refactor: make in_transaction default True

Added Documentation in Russian Language

.github/FUNDING.yml

@@ -0,0 +1 @@
+custom: ["https://sponsor.long2ice.io"]

.github/workflows/ci.yml

@@ -1,7 +1,13 @@
-name: test
-on: [push, pull_request]
+name: ci
+on:
+  push:
+    branches-ignore:
+      - main
+  pull_request:
+    branches-ignore:
+      - main
 jobs:
-  testall:
+  ci:
     runs-on: ubuntu-latest
     services:
       postgres:
@@ -19,10 +25,10 @@ jobs:
       - uses: actions/setup-python@v2
         with:
           python-version: '3.x'
-      - name: Install dependencies
+      - name: Install and configure Poetry
         run: |
-          python -m pip install --upgrade pip
-          pip install -r requirements-dev.txt
+          pip install -U pip poetry
+          poetry config virtualenvs.create false
       - name: CI
         env:
           MYSQL_PASS: root
@@ -31,4 +37,4 @@ jobs:
           POSTGRES_PASS: 123456
           POSTGRES_HOST: 127.0.0.1
           POSTGRES_PORT: 5432
-        run: make testall
+        run: make ci

.github/workflows/pypi.yml

@@ -8,14 +8,17 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: actions/setup-python@v1
+      - uses: actions/setup-python@v2
         with:
           python-version: '3.x'
-      - name: Build dists
+      - name: Install and configure Poetry
         run: |
-          python3 setup.py sdist
+          pip install -U pip poetry
+          poetry config virtualenvs.create false
+      - name: Build dists
+        run: make build
       - name: Pypi Publish
         uses: pypa/gh-action-pypi-publish@master
         with:
           user: __token__
-          password: ${{ secrets.pypi_password }}
+          password: ${{ secrets.pypi_password }}

.gitignore

@@ -143,4 +143,7 @@ cython_debug/
 .idea
 migrations
 aerich.ini
-src
+src
+.vscode
+.DS_Store
+.python-version

CHANGELOG.md

@@ -0,0 +1,248 @@
+# ChangeLog
+
+## 0.7
+
+### 0.7.2
+
+- Support virtual fields.
+- Fix modify multiple times. (#279)
+- Added `-i` and `--in-transaction` options to `aerich migrate` command. (#296)
+- Fix generates two semicolons in a row. (#301)
+
+### 0.7.1
+
+- Fix syntax error with python3.8.10. (#265)
+- Fix sql generate error. (#263)
+- Fix initialize an empty database. (#267)
+
+### 0.7.1rc1
+
+- Fix postgres sql error (#263)
+
+### 0.7.0
+
+**Now aerich use `.py` file to record versions.**
+
+Upgrade Note:
+
+1. Drop `aerich` table
+2. Delete `migrations/models` folder
+3. Run `aerich init-db`
+
+- Improve `inspectdb` adding support to `postgresql::numeric` data type
+- Add support for dynamically load DDL classes easing to add support to
+  new databases without changing `Migrate` class logic
+- Fix decimal field change. (#246)
+- Support add/remove field with index.
+
+## 0.6
+
+### 0.6.3
+
+- Improve `inspectdb` and support `postgres` & `sqlite`.
+
+### 0.6.2
+
+- Support migration for specified index. (#203)
+
+### 0.6.1
+
+- Fix `pyproject.toml` not existing error. (#217)
+
+### 0.6.0
+
+- Change default config file from `aerich.ini` to `pyproject.toml`. (#197)
+
+  **Upgrade note:**
+    1. Run `aerich init -t config.TORTOISE_ORM`.
+    2. Remove `aerich.ini`.
+- Remove `pydantic` dependency. (#198)
+- `inspectdb` support `DATE`. (#215)
+
+## 0.5
+
+### 0.5.8
+
+- Support `indexes` change. (#193)
+
+### 0.5.7
+
+- Fix no module found error. (#188) (#189)
+
+### 0.5.6
+
+- Add `Command` class. (#148) (#141) (#123) (#106)
+- Fix: migrate doesn't use source_field in unique_together. (#181)
+
+### 0.5.5
+
+- Fix KeyError: 'src_folder' after upgrading aerich to 0.5.4. (#176)
+- Fix MySQL 5.X rename column.
+- Fix `db_constraint` when fk changed. (#179)
+
+### 0.5.4
+
+- Fix incorrect index creation order. (#151)
+- Not catch exception when import config. (#164)
+- Support `drop column` for sqlite. (#40)
+
+### 0.5.3
+
+- Fix postgre alter null. (#142)
+- Fix default function when migrate. (#147)
+
+### 0.5.2
+
+- Fix rename field on the field add. (#134)
+- Fix postgres field type change error. (#135)
+- Fix inspectdb for `FloatField`. (#138)
+- Support `rename table`. (#139)
+
+### 0.5.1
+
+- Fix tortoise connections not being closed properly. (#120)
+- Fix bug for field change. (#119)
+- Fix drop model in the downgrade. (#132)
+
+### 0.5.0
+
+- Refactor core code, now has no limitation for everything.
+
+## 0.4
+
+### 0.4.4
+
+- Fix unnecessary import. (#113)
+
+### 0.4.3
+
+- Replace migrations separator to sql standard comment.
+- Add `inspectdb` command.
+
+### 0.4.2
+
+- Use `pathlib` for path resolving. (#89)
+- Fix upgrade in new db. (#96)
+- Fix packaging error. (#92)
+
+### 0.4.1
+
+- Bug fix. (#91 #93)
+
+### 0.4.0
+
+- Use `.sql` instead of `.json` to store version file.
+- Add `rename` column support MySQL5.
+- Remove callable detection for defaults. (#87)
+- Fix `sqlite` stuck. (#90)
+
+## 0.3
+
+### 0.3.3
+
+- Fix encoding error. (#75)
+- Support multiple databases. (#68)
+- Compatible with models file in directory. (#70)
+
+### 0.3.2
+
+- Fix migrate to new database error. (#62)
+
+### 0.3.1
+
+- Fix first version error.
+- Fix init error. (#61)
+
+### 0.3.0
+
+- Refactoring migrate logic, and this version is not compatible with previous version.
+- Now there don't need `old_models.py` and it store in database.
+- Upgrade steps:
+    1. Upgrade aerich version.
+    2. Drop aerich table in database.
+    3. Delete `migrations/{app}` folder and rerun `aerich init-db`.
+    4. Update model and `aerich migrate` normally.
+
+## 0.2
+
+### 0.2.5
+
+- Fix windows support. (#46)
+- Support `db_constraint` in fk, m2m should manual define table with fk. (#52)
+
+### 0.2.4
+
+- Raise error with SQLite unsupported features.
+- Fix Postgres alter table. (#48)
+- Add `Rename` support.
+
+### 0.2.3
+
+- Fix tortoise ssl config.
+- PostgreSQL add/drop index/unique.
+
+### 0.2.2
+
+- Fix postgres drop fk.
+- Fix version sort.
+
+### 0.2.1
+
+- Fix bug in windows.
+- Enhance PostgreSQL support.
+
+### 0.2.0
+
+- Update model file find method.
+- Set `--safe` bool.
+
+## 0.1
+
+### 0.1.9
+
+- Fix default_connection when upgrade
+- Find default app instead of default.
+- Diff MySQL ddl.
+- Check tortoise config.
+
+### 0.1.8
+
+- Fix upgrade error when migrate.
+- Fix init db sql error.
+- Support change column.
+
+### 0.1.7
+
+- Exclude models.Aerich.
+- Add init record when init-db.
+- Fix version num str.
+
+### 0.1.6
+
+- update dependency_links
+
+### 0.1.5
+
+- Add sqlite and postgres support.
+- Fix dependency import.
+- Store versions in db.
+
+### 0.1.4
+
+- Fix transaction and fields import.
+- Make unique index worked.
+- Add cli --version.
+
+### 0.1.3
+
+- Support indexes and unique_together.
+
+### 0.1.2
+
+- Now aerich support m2m.
+- Add cli cmd init-db.
+- Change cli options.
+
+### 0.1.1
+
+- Now aerich is basic worked.

CHANGELOG.rst

@@ -1,31 +0,0 @@
-=========
-ChangeLog
-=========
-
-0.1
-===
-0.1.5
------
-- Add sqlite and postgres support.
-- Fix dependency import.
-- Store versions in db.
-
-0.1.4
------
-- Fix transaction and fields import.
-- Make unique index worked.
-- Add cli --version.
-
-0.1.3
------
-- Support indexes and unique_together.
-
-0.1.2
------
-- Now aerich support m2m.
-- Add cli cmd init-db.
-- Change cli options.
-
-0.1.1
------
-- Now aerich is basic worked.

LICENSE

@@ -1,21 +1,201 @@
-The MIT License (MIT)
+                                 Apache License
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-copies of the Software, and to permit persons to whom the Software is
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+   limitations under the License.

MANIFEST.in

@@ -1,3 +0,0 @@
-include LICENSE
-include README.rst
-include requirements.txt

Makefile

@@ -1,40 +1,26 @@
-checkfiles = aerich/ tests/
+checkfiles = aerich/ tests/ conftest.py
 black_opts = -l 100 -t py38
 py_warn = PYTHONDEVMODE=1
 MYSQL_HOST ?= "127.0.0.1"
 MYSQL_PORT ?= 3306
+MYSQL_PASS ?= "123456"
 POSTGRES_HOST ?= "127.0.0.1"
 POSTGRES_PORT ?= 5432
+POSTGRES_PASS ?= "123456"
 
-help:
-	@echo "Aerich development makefile"
-	@echo
-	@echo  "usage: make <target>"
-	@echo  "Targets:"
-	@echo  "    up			Updates dev/test dependencies"
-	@echo  "    deps        Ensure dev/test dependencies are installed"
-	@echo  "    check		Checks that build is sane"
-	@echo  "    lint		Reports all linter violations"
-	@echo  "    test		Runs all tests"
-	@echo  "    style		Auto-formats the code"
+up:
+	@poetry update
 
 deps:
-	@which pip-sync > /dev/null || pip install -q pip-tools
-	@pip install -r requirements-dev.txt
+	@poetry install -E asyncpg -E asyncmy
 
 style: deps
-	isort -rc $(checkfiles)
-	black $(black_opts) $(checkfiles)
+	@isort -src $(checkfiles)
+	@black $(black_opts) $(checkfiles)
 
 check: deps
-ifneq ($(shell which black),)
-	black --check $(black_opts) $(checkfiles) || (echo "Please run 'make style' to auto-fix style issues" && false)
-endif
-	flake8 $(checkfiles)
-	mypy $(checkfiles)
-	pylint -d C,W,R $(checkfiles)
-	bandit -r $(checkfiles)
-	python setup.py check -mrs
+	@black --check $(black_opts) $(checkfiles) || (echo "Please run 'make style' to auto-fix style issues" && false)
+	@ruff $(checkfiles)
 
 test: deps
 	$(py_warn) TEST_DB=sqlite://:memory: py.test
@@ -43,17 +29,14 @@ test_sqlite:
 	$(py_warn) TEST_DB=sqlite://:memory: py.test
 
 test_mysql:
-	$(py_warn) TEST_DB="mysql://root:$(MYSQL_PASS)@$(MYSQL_HOST):$(MYSQL_PORT)/test_\{\}" py.test
+	$(py_warn) TEST_DB="mysql://root:$(MYSQL_PASS)@$(MYSQL_HOST):$(MYSQL_PORT)/test_\{\}" pytest -vv -s
 
 test_postgres:
-	$(py_warn) TEST_DB="postgres://postgres:$(POSTGRES_PASS)@$(POSTGRES_HOST):$(POSTGRES_PORT)/test_\{\}" py.test
+	$(py_warn) TEST_DB="postgres://postgres:$(POSTGRES_PASS)@$(POSTGRES_HOST):$(POSTGRES_PORT)/test_\{\}" pytest -vv -s
 
 testall: deps test_sqlite test_postgres test_mysql
 
-publish: deps
-	rm -fR dist/
-	python setup.py sdist
-	twine upload dist/*
+build: deps
+	@poetry build
 
-ci:
-	@act -P ubuntu-latest=nektos/act-environments-ubuntu:18.04 -b
+ci: check testall

README.md

@@ -0,0 +1,276 @@
+# Aerich
+
+[![image](https://img.shields.io/pypi/v/aerich.svg?style=flat)](https://pypi.python.org/pypi/aerich)
+[![image](https://img.shields.io/github/license/tortoise/aerich)](https://github.com/tortoise/aerich)
+[![image](https://github.com/tortoise/aerich/workflows/pypi/badge.svg)](https://github.com/tortoise/aerich/actions?query=workflow:pypi)
+[![image](https://github.com/tortoise/aerich/workflows/ci/badge.svg)](https://github.com/tortoise/aerich/actions?query=workflow:ci)
+
+English | [Русский](./README_RU.md)
+
+## Introduction
+
+Aerich is a database migrations tool for TortoiseORM, which is like alembic for SQLAlchemy, or like Django ORM with
+it\'s own migration solution.
+
+## Install
+
+Just install from pypi:
+
+```shell
+pip install aerich
+```
+
+## Quick Start
+
+```shell
+> aerich -h
+
+Usage: aerich [OPTIONS] COMMAND [ARGS]...
+
+Options:
+  -V, --version      Show the version and exit.
+  -c, --config TEXT  Config file.  [default: pyproject.toml]
+  --app TEXT         Tortoise-ORM app name.
+  -h, --help         Show this message and exit.
+
+Commands:
+  downgrade  Downgrade to specified version.
+  heads      Show current available heads in migrate location.
+  history    List all migrate items.
+  init       Init config file and generate root migrate location.
+  init-db    Generate schema and generate app migrate location.
+  inspectdb  Introspects the database tables to standard output as...
+  migrate    Generate migrate changes file.
+  upgrade    Upgrade to specified version.
+```
+
+## Usage
+
+You need add `aerich.models` to your `Tortoise-ORM` config first. Example:
+
+```python
+TORTOISE_ORM = {
+    "connections": {"default": "mysql://root:123456@127.0.0.1:3306/test"},
+    "apps": {
+        "models": {
+            "models": ["tests.models", "aerich.models"],
+            "default_connection": "default",
+        },
+    },
+}
+```
+
+### Initialization
+
+```shell
+> aerich init -h
+
+Usage: aerich init [OPTIONS]
+
+  Init config file and generate root migrate location.
+
+Options:
+  -t, --tortoise-orm TEXT  Tortoise-ORM config module dict variable, like
+                           settings.TORTOISE_ORM.  [required]
+  --location TEXT          Migrate store location.  [default: ./migrations]
+  -s, --src_folder TEXT    Folder of the source, relative to the project root.
+  -h, --help               Show this message and exit.
+```
+
+Initialize the config file and migrations location:
+
+```shell
+> aerich init -t tests.backends.mysql.TORTOISE_ORM
+
+Success create migrate location ./migrations
+Success write config to pyproject.toml
+```
+
+### Init db
+
+```shell
+> aerich init-db
+
+Success create app migrate location ./migrations/models
+Success generate schema for app "models"
+```
+
+If your Tortoise-ORM app is not the default `models`, you must specify the correct app via `--app`,
+e.g. `aerich --app other_models init-db`.
+
+### Update models and make migrate
+
+```shell
+> aerich migrate --name drop_column
+
+Success migrate 1_202029051520102929_drop_column.py
+```
+
+Format of migrate filename is
+`{version_num}_{datetime}_{name|update}.py`.
+
+If `aerich` guesses you are renaming a column, it will ask `Rename {old_column} to {new_column} [True]`. You can choose
+`True` to rename column without column drop, or choose `False` to drop the column then create. Note that the latter may
+lose data.
+
+### Upgrade to latest version
+
+```shell
+> aerich upgrade
+
+Success upgrade 1_202029051520102929_drop_column.py
+```
+
+Now your db is migrated to latest.
+
+### Downgrade to specified version
+
+```shell
+> aerich downgrade -h
+
+Usage: aerich downgrade [OPTIONS]
+
+  Downgrade to specified version.
+
+Options:
+  -v, --version INTEGER  Specified version, default to last.  [default: -1]
+  -d, --delete           Delete version files at the same time.  [default:
+                         False]
+
+  --yes                  Confirm the action without prompting.
+  -h, --help             Show this message and exit.
+```
+
+```shell
+> aerich downgrade
+
+Success downgrade 1_202029051520102929_drop_column.py
+```
+
+Now your db is rolled back to the specified version.
+
+### Show history
+
+```shell
+> aerich history
+
+1_202029051520102929_drop_column.py
+```
+
+### Show heads to be migrated
+
+```shell
+> aerich heads
+
+1_202029051520102929_drop_column.py
+```
+
+### Inspect db tables to TortoiseORM model
+
+Currently `inspectdb` support MySQL & Postgres & SQLite.
+
+```shell
+Usage: aerich inspectdb [OPTIONS]
+
+  Introspects the database tables to standard output as TortoiseORM model.
+
+Options:
+  -t, --table TEXT  Which tables to inspect.
+  -h, --help        Show this message and exit.
+```
+
+Inspect all tables and print to console:
+
+```shell
+aerich --app models inspectdb
+```
+
+Inspect a specified table in the default app and redirect to `models.py`:
+
+```shell
+aerich inspectdb -t user > models.py
+```
+
+For example, you table is:
+
+```sql
+CREATE TABLE `test`
+(
+    `id`       int            NOT NULL AUTO_INCREMENT,
+    `decimal`  decimal(10, 2) NOT NULL,
+    `date`     date                                    DEFAULT NULL,
+    `datetime` datetime       NOT NULL                 DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+    `time`     time                                    DEFAULT NULL,
+    `float`    float                                   DEFAULT NULL,
+    `string`   varchar(200) COLLATE utf8mb4_general_ci DEFAULT NULL,
+    `tinyint`  tinyint                                 DEFAULT NULL,
+    PRIMARY KEY (`id`),
+    KEY `asyncmy_string_index` (`string`)
+) ENGINE = InnoDB
+  DEFAULT CHARSET = utf8mb4
+  COLLATE = utf8mb4_general_ci
+```
+
+Now run `aerich inspectdb -t test` to see the generated model:
+
+```python
+from tortoise import Model, fields
+
+
+class Test(Model):
+    date = fields.DateField(null=True, )
+    datetime = fields.DatetimeField(auto_now=True, )
+    decimal = fields.DecimalField(max_digits=10, decimal_places=2, )
+    float = fields.FloatField(null=True, )
+    id = fields.IntField(pk=True, )
+    string = fields.CharField(max_length=200, null=True, )
+    time = fields.TimeField(null=True, )
+    tinyint = fields.BooleanField(null=True, )
+```
+
+Note that this command is limited and can't infer some fields, such as `IntEnumField`, `ForeignKeyField`, and others.
+
+### Multiple databases
+
+```python
+tortoise_orm = {
+    "connections": {
+        "default": expand_db_url(db_url, True),
+        "second": expand_db_url(db_url_second, True),
+    },
+    "apps": {
+        "models": {"models": ["tests.models", "aerich.models"], "default_connection": "default"},
+        "models_second": {"models": ["tests.models_second"], "default_connection": "second", },
+    },
+}
+```
+
+You only need to specify `aerich.models` in one app, and must specify `--app` when running `aerich migrate` and so on.
+
+## Restore `aerich` workflow
+
+In some cases, such as broken changes from upgrade of `aerich`, you can't run `aerich migrate` or `aerich upgrade`, you
+can make the following steps:
+
+1. drop `aerich` table.
+2. delete `migrations/{app}` directory.
+3. rerun `aerich init-db`.
+
+Note that these actions is safe, also you can do that to reset your migrations if your migration files is too many.
+
+## Use `aerich` in application
+
+You can use `aerich` out of cli by use `Command` class.
+
+```python
+from aerich import Command
+
+command = Command(tortoise_config=config, app='models')
+await command.init()
+await command.migrate('test')
+```
+
+## License
+
+This project is licensed under the
+[Apache-2.0](https://github.com/long2ice/aerich/blob/master/LICENSE) License.

README.rst

@@ -1,160 +0,0 @@
-======
-Aerich
-======
-
-.. image:: https://img.shields.io/pypi/v/aerich.svg?style=flat
-   :target: https://pypi.python.org/pypi/aerich
-.. image:: https://img.shields.io/github/license/long2ice/aerich
-   :target: https://github.com/long2ice/aerich
-.. image:: https://github.com/long2ice/aerich/workflows/pypi/badge.svg
-   :target: https://github.com/long2ice/aerich/actions?query=workflow:pypi
-.. image:: https://github.com/long2ice/aerich/workflows/test/badge.svg
-   :target: https://github.com/long2ice/aerich/actions?query=workflow:test
-
-Introduction
-============
-
-Tortoise-ORM is the best asyncio ORM now, but it lacks a database migrations tool like alembic for SQLAlchemy, or Django ORM with it's own migrations tool.
-
-This project aim to be a best migrations tool for Tortoise-ORM and which written by one of contributors of Tortoise-ORM.
-
-Install
-=======
-
-Just install from pypi:
-
-.. code-block:: shell
-
-    $ pip install aerich
-
-Quick Start
-===========
-
-.. code-block:: shell
-
-    $ aerich -h
-
-    Usage: aerich [OPTIONS] COMMAND [ARGS]...
-
-    Options:
-      -c, --config TEXT  Config file.  [default: aerich.ini]
-      --app TEXT         Tortoise-ORM app name.  [default: models]
-      -n, --name TEXT    Name of section in .ini file to use for aerich config.
-                         [default: aerich]
-      -h, --help         Show this message and exit.
-
-    Commands:
-      downgrade  Downgrade to previous version.
-      heads      Show current available heads in migrate location.
-      history    List all migrate items.
-      init       Init config file and generate root migrate location.
-      init-db    Generate schema and generate app migrate location.
-      migrate    Generate migrate changes file.
-      upgrade    Upgrade to latest version.
-
-Usage
-=====
-You need add ``aerich.models`` to your ``Tortoise-ORM`` config first, example:
-
-.. code-block:: python
-
-    TORTOISE_ORM = {
-        "connections": {"default": "mysql://root:123456@127.0.0.1:3306/test"},
-        "apps": {
-            "models": {
-                "models": ["tests.models", "aerich.models"],
-                "default_connection": "default",
-            },
-        },
-    }
-
-Initialization
---------------
-
-.. code-block:: shell
-
-    $ aerich init -h
-
-    Usage: aerich init [OPTIONS]
-
-      Init config file and generate root migrate location.
-
-    Options:
-      -t, --tortoise-orm TEXT  Tortoise-ORM config module dict variable, like settings.TORTOISE_ORM.
-                               [required]
-      --location TEXT          Migrate store location.  [default: ./migrations]
-      -h, --help               Show this message and exit.
-
-Init config file and location:
-
-.. code-block:: shell
-
-    $ aerich init -t tests.backends.mysql.TORTOISE_ORM
-
-    Success create migrate location ./migrations
-    Success generate config file aerich.ini
-
-Init db
--------
-
-.. code-block:: shell
-
-    $ aerich init-db
-
-    Success create app migrate location ./migrations/models
-    Success generate schema for app "models"
-
-Update models and make migrate
-------------------------------
-
-.. code-block:: shell
-
-    $ aerich migrate --name drop_column
-
-    Success migrate 1_202029051520102929_drop_column.json
-
-Format of migrate filename is ``{version_num}_{datetime}_{name|update}.json``
-
-Upgrade to latest version
--------------------------
-
-.. code-block:: shell
-
-    $ aerich upgrade
-
-    Success upgrade 1_202029051520102929_drop_column.json
-
-Now your db is migrated to latest.
-
-Downgrade to previous version
------------------------------
-
-.. code-block:: shell
-
-    $ aerich downgrade
-
-    Success downgrade 1_202029051520102929_drop_column.json
-
-Now your db rollback to previous version.
-
-Show history
-------------
-
-.. code-block:: shell
-
-    $ aerich history
-
-    1_202029051520102929_drop_column.json
-
-Show heads to be migrated
--------------------------
-
-.. code-block:: shell
-
-    $ aerich heads
-
-    1_202029051520102929_drop_column.json
-
-License
-=======
-This project is licensed under the `MIT <https://github.com/long2ice/aerich/blob/master/LICENSE>`_ License.

README_RU.md

@@ -0,0 +1,274 @@
+# Aerich
+ 
+[![image](https://img.shields.io/pypi/v/aerich.svg?style=flat)](https://pypi.python.org/pypi/aerich)
+[![image](https://img.shields.io/github/license/tortoise/aerich)](https://github.com/tortoise/aerich)
+[![image](https://github.com/tortoise/aerich/workflows/pypi/badge.svg)](https://github.com/tortoise/aerich/actions?query=workflow:pypi)
+[![image](https://github.com/tortoise/aerich/workflows/ci/badge.svg)](https://github.com/tortoise/aerich/actions?query=workflow:ci)
+ 
+[English](./README.md) | Русский
+
+## Введение
+ 
+Aerich - это инструмент для миграции базы данных для TortoiseORM, который аналогичен Alembic для SQLAlchemy или встроенному решению миграций в Django ORM.
+ 
+## Установка
+ 
+Просто установите из pypi:
+ 
+```shell
+pip install aerich
+```
+ 
+## Быстрый старт
+ 
+```shell
+> aerich -h
+ 
+Usage: aerich [OPTIONS] COMMAND [ARGS]...
+ 
+Options:
+  -V, --version      Show the version and exit.
+  -c, --config TEXT  Config file.  [default: pyproject.toml]
+  --app TEXT         Tortoise-ORM app name.
+  -h, --help         Show this message and exit.
+ 
+Commands:
+  downgrade  Downgrade to specified version.
+  heads      Show current available heads in migrate location.
+  history    List all migrate items.
+  init       Init config file and generate root migrate location.
+  init-db    Generate schema and generate app migrate location.
+  inspectdb  Introspects the database tables to standard output as...
+  migrate    Generate migrate changes file.
+  upgrade    Upgrade to specified version.
+```
+ 
+## Использование
+ 
+Сначала вам нужно добавить aerich.models в конфигурацию вашего Tortoise-ORM. Пример:
+ 
+```python
+TORTOISE_ORM = {
+    "connections": {"default": "mysql://root:123456@127.0.0.1:3306/test"},
+    "apps": {
+        "models": {
+            "models": ["tests.models", "aerich.models"],
+            "default_connection": "default",
+        },
+    },
+}
+```
+ 
+### Инициализация
+ 
+```shell
+> aerich init -h
+ 
+Usage: aerich init [OPTIONS]
+ 
+  Init config file and generate root migrate location.
+ 
+Options:
+  -t, --tortoise-orm TEXT  Tortoise-ORM config module dict variable, like
+                           settings.TORTOISE_ORM.  [required]
+  --location TEXT          Migrate store location.  [default: ./migrations]
+  -s, --src_folder TEXT    Folder of the source, relative to the project root.
+  -h, --help               Show this message and exit.
+```
+ 
+Инициализируйте файл конфигурации и задайте местоположение миграций:
+ 
+```shell
+> aerich init -t tests.backends.mysql.TORTOISE_ORM
+ 
+Success create migrate location ./migrations
+Success write config to pyproject.toml
+```
+ 
+### Инициализация базы данных
+ 
+```shell
+> aerich init-db
+ 
+Success create app migrate location ./migrations/models
+Success generate schema for app "models"
+```
+ 
+Если ваше приложение Tortoise-ORM не является приложением по умолчанию с именем models, вы должны указать правильное имя приложения с помощью параметра --app, например: aerich --app other_models init-db.
+ 
+### Обновление моделей и создание миграции
+ 
+```shell
+> aerich migrate --name drop_column
+ 
+Success migrate 1_202029051520102929_drop_column.py
+```
+ 
+Формат имени файла миграции следующий: `{версия}_{дата_и_время}_{имя|обновление}.py`.
+ 
+Если aerich предполагает, что вы переименовываете столбец, он спросит: 
+Переименовать `{старый_столбец} в {новый_столбец} [True]`. Вы можете выбрать `True`,
+чтобы переименовать столбец без удаления столбца, или выбрать `False`, чтобы удалить столбец,
+а затем создать новый. Обратите внимание, что последний вариант может привести к потере данных.
+ 
+ 
+### Обновление до последней версии
+ 
+```shell
+> aerich upgrade
+ 
+Success upgrade 1_202029051520102929_drop_column.py
+```
+ 
+Теперь ваша база данных обновлена до последней версии.
+ 
+### Откат до указанной версии
+ 
+```shell
+> aerich downgrade -h
+ 
+Usage: aerich downgrade [OPTIONS]
+ 
+  Downgrade to specified version.
+ 
+Options:
+  -v, --version INTEGER  Specified version, default to last.  [default: -1]
+  -d, --delete           Delete version files at the same time.  [default:
+                         False]
+ 
+  --yes                  Confirm the action without prompting.
+  -h, --help             Show this message and exit.
+```
+ 
+```shell
+> aerich downgrade
+ 
+Success downgrade 1_202029051520102929_drop_column.py
+```
+ 
+Теперь ваша база данных откатилась до указанной версии.
+ 
+### Показать историю
+ 
+```shell
+> aerich history
+ 
+1_202029051520102929_drop_column.py
+```
+ 
+### Чтобы узнать, какие миграции должны быть применены, можно использовать команду:
+ 
+```shell
+> aerich heads
+ 
+1_202029051520102929_drop_column.py
+```
+ 
+### Осмотр таблиц базы данных для модели TortoiseORM
+ 
+В настоящее время inspectdb поддерживает MySQL, Postgres и SQLite.
+ 
+```shell
+Usage: aerich inspectdb [OPTIONS]
+ 
+  Introspects the database tables to standard output as TortoiseORM model.
+ 
+Options:
+  -t, --table TEXT  Which tables to inspect.
+  -h, --help        Show this message and exit.
+```
+ 
+Посмотреть все таблицы и вывести их на консоль:
+ 
+```shell
+aerich --app models inspectdb
+```
+ 
+Осмотреть указанную таблицу в приложении по умолчанию и перенаправить в models.py:
+ 
+```shell
+aerich inspectdb -t user > models.py
+```
+ 
+Например, ваша таблица выглядит следующим образом:
+ 
+```sql
+CREATE TABLE `test`
+(
+    `id`       int            NOT NULL AUTO_INCREMENT,
+    `decimal`  decimal(10, 2) NOT NULL,
+    `date`     date                                    DEFAULT NULL,
+    `datetime` datetime       NOT NULL                 DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+    `time`     time                                    DEFAULT NULL,
+    `float`    float                                   DEFAULT NULL,
+    `string`   varchar(200) COLLATE utf8mb4_general_ci DEFAULT NULL,
+    `tinyint`  tinyint                                 DEFAULT NULL,
+    PRIMARY KEY (`id`),
+    KEY `asyncmy_string_index` (`string`)
+) ENGINE = InnoDB
+  DEFAULT CHARSET = utf8mb4
+  COLLATE = utf8mb4_general_ci
+```
+ 
+Теперь выполните команду aerich inspectdb -t test, чтобы увидеть сгенерированную модель:
+ 
+```python
+from tortoise import Model, fields
+ 
+ 
+class Test(Model):
+    date = fields.DateField(null=True, )
+    datetime = fields.DatetimeField(auto_now=True, )
+    decimal = fields.DecimalField(max_digits=10, decimal_places=2, )
+    float = fields.FloatField(null=True, )
+    id = fields.IntField(pk=True, )
+    string = fields.CharField(max_length=200, null=True, )
+    time = fields.TimeField(null=True, )
+    tinyint = fields.BooleanField(null=True, )
+```
+ 
+Обратите внимание, что эта команда имеет ограничения и не может автоматически определить некоторые поля, такие как `IntEnumField`, `ForeignKeyField` и другие.
+ 
+### Несколько баз данных
+ 
+```python
+tortoise_orm = {
+    "connections": {
+        "default": expand_db_url(db_url, True),
+        "second": expand_db_url(db_url_second, True),
+    },
+    "apps": {
+        "models": {"models": ["tests.models", "aerich.models"], "default_connection": "default"},
+        "models_second": {"models": ["tests.models_second"], "default_connection": "second", },
+    },
+}
+```
+ 
+Вам нужно указать `aerich.models` только в одном приложении и должны указывать `--app` при запуске команды `aerich migrate` и т.д.
+ 
+## Восстановление рабочего процесса aerich
+ 
+В некоторых случаях, например, при возникновении проблем после обновления `aerich`, вы не можете запустить `aerich migrate` или `aerich upgrade`. В таком случае вы можете выполнить следующие шаги:
+ 
+1. удалите таблицы `aerich`.
+2. удалите директорию `migrations/{app}`.
+3. rerun `aerich init-db`.
+ 
+Обратите внимание, что эти действия безопасны, и вы можете использовать их для сброса миграций, если у вас слишком много файлов миграции.
+ 
+## Использование aerich в приложении
+ 
+Вы можете использовать `aerich` вне командной строки, используя класс `Command`.
+ 
+```python
+from aerich import Command
+ 
+command = Command(tortoise_config=config, app='models')
+await command.init()
+await command.migrate('test')
+```
+ 
+## Лицензия
+ 
+Этот проект лицензирован в соответствии с лицензией
+[Apache-2.0](https://github.com/long2ice/aerich/blob/master/LICENSE) Лицензия.

aerich/__init__.py

@@ -1 +1,150 @@
-__version__ = "0.1.4"
+import os
+from pathlib import Path
+from typing import List
+
+from tortoise import Tortoise, generate_schema_for_client
+from tortoise.exceptions import OperationalError
+from tortoise.transactions import in_transaction
+from tortoise.utils import get_schema_sql
+
+from aerich.exceptions import DowngradeError
+from aerich.inspectdb.mysql import InspectMySQL
+from aerich.inspectdb.postgres import InspectPostgres
+from aerich.inspectdb.sqlite import InspectSQLite
+from aerich.migrate import MIGRATE_TEMPLATE, Migrate
+from aerich.models import Aerich
+from aerich.utils import (
+    get_app_connection,
+    get_app_connection_name,
+    get_models_describe,
+    import_py_file,
+)
+
+
+class Command:
+    def __init__(
+        self,
+        tortoise_config: dict,
+        app: str = "models",
+        location: str = "./migrations",
+    ):
+        self.tortoise_config = tortoise_config
+        self.app = app
+        self.location = location
+        Migrate.app = app
+
+    async def init(self):
+        await Migrate.init(self.tortoise_config, self.app, self.location)
+
+    async def _upgrade(self, conn, version_file):
+        file_path = Path(Migrate.migrate_location, version_file)
+        m = import_py_file(file_path)
+        upgrade = getattr(m, "upgrade")
+        await conn.execute_script(await upgrade(conn))
+        await Aerich.create(
+            version=version_file,
+            app=self.app,
+            content=get_models_describe(self.app),
+        )
+
+    async def upgrade(self, run_in_transaction: bool = True):
+        migrated = []
+        for version_file in Migrate.get_all_version_files():
+            try:
+                exists = await Aerich.exists(version=version_file, app=self.app)
+            except OperationalError:
+                exists = False
+            if not exists:
+                app_conn_name = get_app_connection_name(self.tortoise_config, self.app)
+                if run_in_transaction:
+                    async with in_transaction(app_conn_name) as conn:
+                        await self._upgrade(conn, version_file)
+                else:
+                    app_conn = get_app_connection(self.tortoise_config, self.app)
+                    await self._upgrade(app_conn, version_file)
+                migrated.append(version_file)
+        return migrated
+
+    async def downgrade(self, version: int, delete: bool):
+        ret = []
+        if version == -1:
+            specified_version = await Migrate.get_last_version()
+        else:
+            specified_version = await Aerich.filter(
+                app=self.app, version__startswith=f"{version}_"
+            ).first()
+        if not specified_version:
+            raise DowngradeError("No specified version found")
+        if version == -1:
+            versions = [specified_version]
+        else:
+            versions = await Aerich.filter(app=self.app, pk__gte=specified_version.pk)
+        for version in versions:
+            file = version.version
+            async with in_transaction(
+                get_app_connection_name(self.tortoise_config, self.app)
+            ) as conn:
+                file_path = Path(Migrate.migrate_location, file)
+                m = import_py_file(file_path)
+                downgrade = getattr(m, "downgrade")
+                downgrade_sql = await downgrade(conn)
+                if not downgrade_sql.strip():
+                    raise DowngradeError("No downgrade items found")
+                await conn.execute_script(downgrade_sql)
+                await version.delete()
+                if delete:
+                    os.unlink(file_path)
+                ret.append(file)
+        return ret
+
+    async def heads(self):
+        ret = []
+        versions = Migrate.get_all_version_files()
+        for version in versions:
+            if not await Aerich.exists(version=version, app=self.app):
+                ret.append(version)
+        return ret
+
+    async def history(self):
+        versions = Migrate.get_all_version_files()
+        return [version for version in versions]
+
+    async def inspectdb(self, tables: List[str] = None) -> str:
+        connection = get_app_connection(self.tortoise_config, self.app)
+        dialect = connection.schema_generator.DIALECT
+        if dialect == "mysql":
+            cls = InspectMySQL
+        elif dialect == "postgres":
+            cls = InspectPostgres
+        elif dialect == "sqlite":
+            cls = InspectSQLite
+        else:
+            raise NotImplementedError(f"{dialect} is not supported")
+        inspect = cls(connection, tables)
+        return await inspect.inspect()
+
+    async def migrate(self, name: str = "update"):
+        return await Migrate.migrate(name)
+
+    async def init_db(self, safe: bool):
+        location = self.location
+        app = self.app
+        dirname = Path(location, app)
+        dirname.mkdir(parents=True)
+
+        await Tortoise.init(config=self.tortoise_config)
+        connection = get_app_connection(self.tortoise_config, app)
+        await generate_schema_for_client(connection, safe)
+
+        schema = get_schema_sql(connection, safe)
+
+        version = await Migrate.generate_version()
+        await Aerich.create(
+            version=version,
+            app=app,
+            content=get_models_describe(app),
+        )
+        version_file = Path(dirname, version)
+        content = MIGRATE_TEMPLATE.format(upgrade_sql=schema, downgrade_sql="")
+        with open(version_file, "w", encoding="utf-8") as f:
+            f.write(content)

aerich/cli.py

@@ -1,150 +1,168 @@
-import json
+import asyncio
 import os
-import sys
-from configparser import ConfigParser
-from enum import Enum
+from functools import wraps
+from pathlib import Path
+from typing import List
 
-import asyncclick as click
-from asyncclick import Context, UsageError
-from tortoise import ConfigurationError, Tortoise, generate_schema_for_client
-from tortoise.transactions import in_transaction
+import click
+import tomlkit
+from click import Context, UsageError
+from tomlkit.exceptions import NonExistentKey
+from tortoise import Tortoise
 
-from aerich.migrate import Migrate
-from aerich.utils import get_app_connection, get_app_connection_name, get_tortoise_config
+from aerich import Command
+from aerich.enums import Color
+from aerich.exceptions import DowngradeError
+from aerich.utils import add_src_path, get_tortoise_config
+from aerich.version import __version__
 
-from . import __version__
-from .models import Aerich
+CONFIG_DEFAULT_VALUES = {
+    "src_folder": ".",
+}
 
 
-class Color(str, Enum):
-    green = "green"
-    red = "red"
-    yellow = "yellow"
+def coro(f):
+    @wraps(f)
+    def wrapper(*args, **kwargs):
+        loop = asyncio.get_event_loop()
 
+        # Close db connections at the end of all but the cli group function
+        try:
+            loop.run_until_complete(f(*args, **kwargs))
+        finally:
+            if f.__name__ not in ["cli", "init"]:
+                loop.run_until_complete(Tortoise.close_connections())
 
-parser = ConfigParser()
+    return wrapper
 
 
 @click.group(context_settings={"help_option_names": ["-h", "--help"]})
-@click.version_option(__version__)
+@click.version_option(__version__, "-V", "--version")
 @click.option(
-    "-c", "--config", default="aerich.ini", show_default=True, help="Config file.",
-)
-@click.option("--app", default="models", show_default=True, help="Tortoise-ORM app name.")
-@click.option(
-    "-n",
-    "--name",
-    default="aerich",
+    "-c",
+    "--config",
+    default="pyproject.toml",
     show_default=True,
-    help="Name of section in .ini file to use for aerich config.",
+    help="Config file.",
 )
+@click.option("--app", required=False, help="Tortoise-ORM app name.")
 @click.pass_context
-async def cli(ctx: Context, config, app, name):
+@coro
+async def cli(ctx: Context, config, app):
     ctx.ensure_object(dict)
     ctx.obj["config_file"] = config
-    ctx.obj["name"] = name
-    ctx.obj["app"] = app
 
     invoked_subcommand = ctx.invoked_subcommand
     if invoked_subcommand != "init":
-        if not os.path.exists(config):
+        config_path = Path(config)
+        if not config_path.exists():
             raise UsageError("You must exec init first", ctx=ctx)
-        parser.read(config)
-
-        location = parser[name]["location"]
-        tortoise_orm = parser[name]["tortoise_orm"]
-
+        content = config_path.read_text()
+        doc = tomlkit.parse(content)
+        try:
+            tool = doc["tool"]["aerich"]
+            location = tool["location"]
+            tortoise_orm = tool["tortoise_orm"]
+            src_folder = tool.get("src_folder", CONFIG_DEFAULT_VALUES["src_folder"])
+        except NonExistentKey:
+            raise UsageError("You need run aerich init again when upgrade to 0.6.0+")
+        add_src_path(src_folder)
         tortoise_config = get_tortoise_config(ctx, tortoise_orm)
-
-        ctx.obj["config"] = tortoise_config
-        ctx.obj["location"] = location
-
+        app = app or list(tortoise_config.get("apps").keys())[0]
+        command = Command(tortoise_config=tortoise_config, app=app, location=location)
+        ctx.obj["command"] = command
         if invoked_subcommand != "init-db":
-            try:
-                await Migrate.init_with_old_models(tortoise_config, app, location)
-            except ConfigurationError:
-                raise UsageError(ctx=ctx, message="You must exec init-db first")
+            if not Path(location, app).exists():
+                raise UsageError("You must exec init-db first", ctx=ctx)
+            await command.init()
 
 
 @cli.command(help="Generate migrate changes file.")
 @click.option("--name", default="update", show_default=True, help="Migrate name.")
 @click.pass_context
+@coro
 async def migrate(ctx: Context, name):
-    config = ctx.obj["config"]
-    location = ctx.obj["location"]
-    app = ctx.obj["app"]
-
-    ret = await Migrate.migrate(name)
+    command = ctx.obj["command"]
+    ret = await command.migrate(name)
     if not ret:
         return click.secho("No changes detected", fg=Color.yellow)
-    Migrate.write_old_models(config, app, location)
     click.secho(f"Success migrate {ret}", fg=Color.green)
 
 
-@cli.command(help="Upgrade to latest version.")
+@cli.command(help="Upgrade to specified version.")
+@click.option(
+    "--in-transaction",
+    "-i",
+    default=True,
+    type=bool,
+    help="Make migrations in transaction or not. Can be helpful for large migrations or creating concurrent indexes.",
+)
 @click.pass_context
-async def upgrade(ctx: Context):
-    config = ctx.obj["config"]
-    app = ctx.obj["app"]
-    migrated = False
-    for version in Migrate.get_all_version_files():
-        if not await Aerich.exists(version=version, app=app):
-            async with in_transaction(get_app_connection_name(config, app)) as conn:
-                file_path = os.path.join(Migrate.migrate_location, version)
-                with open(file_path, "r") as f:
-                    content = json.load(f)
-                    upgrade_query_list = content.get("upgrade")
-                    for upgrade_query in upgrade_query_list:
-                        await conn.execute_query(upgrade_query)
-            await Aerich.create(version=version, app=app)
-            click.secho(f"Success upgrade {version}", fg=Color.green)
-            migrated = True
+@coro
+async def upgrade(ctx: Context, in_transaction: bool):
+    command = ctx.obj["command"]
+    migrated = await command.upgrade(run_in_transaction=in_transaction)
     if not migrated:
-        click.secho("No migrate items", fg=Color.yellow)
+        click.secho("No upgrade items found", fg=Color.yellow)
+    else:
+        for version_file in migrated:
+            click.secho(f"Success upgrade {version_file}", fg=Color.green)
 
 
-@cli.command(help="Downgrade to previous version.")
+@cli.command(help="Downgrade to specified version.")
+@click.option(
+    "-v",
+    "--version",
+    default=-1,
+    type=int,
+    show_default=True,
+    help="Specified version, default to last.",
+)
+@click.option(
+    "-d",
+    "--delete",
+    is_flag=True,
+    default=False,
+    show_default=True,
+    help="Delete version files at the same time.",
+)
 @click.pass_context
-async def downgrade(ctx: Context):
-    app = ctx.obj["app"]
-    config = ctx.obj["config"]
-    last_version = await Migrate.get_last_version()
-    if not last_version:
-        return click.secho("No last version found", fg=Color.yellow)
-    file = last_version.version
-    async with in_transaction(get_app_connection_name(config, app)) as conn:
-        file_path = os.path.join(Migrate.migrate_location, file)
-        with open(file_path, "r") as f:
-            content = json.load(f)
-            downgrade_query_list = content.get("downgrade")
-            for downgrade_query in downgrade_query_list:
-                await conn.execute_query(downgrade_query)
-            await last_version.delete()
-        return click.secho(f"Success downgrade {file}", fg=Color.green)
+@click.confirmation_option(
+    prompt="Downgrade is dangerous, which maybe lose your data, are you sure?",
+)
+@coro
+async def downgrade(ctx: Context, version: int, delete: bool):
+    command = ctx.obj["command"]
+    try:
+        files = await command.downgrade(version, delete)
+    except DowngradeError as e:
+        return click.secho(str(e), fg=Color.yellow)
+    for file in files:
+        click.secho(f"Success downgrade {file}", fg=Color.green)
 
 
 @cli.command(help="Show current available heads in migrate location.")
 @click.pass_context
+@coro
 async def heads(ctx: Context):
-    app = ctx.obj["app"]
-    versions = Migrate.get_all_version_files()
-    is_heads = False
-    for version in versions:
-        if not await Aerich.exists(version=version, app=app):
-            click.secho(version, fg=Color.green)
-            is_heads = True
-    if not is_heads:
-        click.secho("No available heads,try migrate", fg=Color.green)
+    command = ctx.obj["command"]
+    head_list = await command.heads()
+    if not head_list:
+        return click.secho("No available heads, try migrate first", fg=Color.green)
+    for version in head_list:
+        click.secho(version, fg=Color.green)
 
 
 @cli.command(help="List all migrate items.")
 @click.pass_context
-def history(ctx):
-    versions = Migrate.get_all_version_files()
+@coro
+async def history(ctx: Context):
+    command = ctx.obj["command"]
+    versions = await command.history()
+    if not versions:
+        return click.secho("No history, try migrate", fg=Color.green)
     for version in versions:
         click.secho(version, fg=Color.green)
-    if not versions:
-        click.secho("No history,try migrate", fg=Color.green)
 
 
 @cli.command(help="Init config file and generate root migrate location.")
@@ -155,59 +173,97 @@ def history(ctx):
     help="Tortoise-ORM config module dict variable, like settings.TORTOISE_ORM.",
 )
 @click.option(
-    "--location", default="./migrations", show_default=True, help="Migrate store location."
+    "--location",
+    default="./migrations",
+    show_default=True,
+    help="Migrate store location.",
+)
+@click.option(
+    "-s",
+    "--src_folder",
+    default=CONFIG_DEFAULT_VALUES["src_folder"],
+    show_default=False,
+    help="Folder of the source, relative to the project root.",
 )
 @click.pass_context
-async def init(
-    ctx: Context, tortoise_orm, location,
-):
+@coro
+async def init(ctx: Context, tortoise_orm, location, src_folder):
     config_file = ctx.obj["config_file"]
-    name = ctx.obj["name"]
-    if os.path.exists(config_file):
-        return click.secho("You have inited", fg=Color.yellow)
 
-    parser.add_section(name)
-    parser.set(name, "tortoise_orm", tortoise_orm)
-    parser.set(name, "location", location)
+    if os.path.isabs(src_folder):
+        src_folder = os.path.relpath(os.getcwd(), src_folder)
+    # Add ./ so it's clear that this is relative path
+    if not src_folder.startswith("./"):
+        src_folder = "./" + src_folder
 
-    with open(config_file, "w") as f:
-        parser.write(f)
+    # check that we can find the configuration, if not we can fail before the config file gets created
+    add_src_path(src_folder)
+    get_tortoise_config(ctx, tortoise_orm)
+    config_path = Path(config_file)
+    if config_path.exists():
+        content = config_path.read_text()
+        doc = tomlkit.parse(content)
+    else:
+        doc = tomlkit.parse("[tool.aerich]")
+    table = tomlkit.table()
+    table["tortoise_orm"] = tortoise_orm
+    table["location"] = location
+    table["src_folder"] = src_folder
+    doc["tool"]["aerich"] = table
 
-    if not os.path.isdir(location):
-        os.mkdir(location)
+    config_path.write_text(tomlkit.dumps(doc))
+
+    Path(location).mkdir(parents=True, exist_ok=True)
 
     click.secho(f"Success create migrate location {location}", fg=Color.green)
-    click.secho(f"Success generate config file {config_file}", fg=Color.green)
+    click.secho(f"Success write config to {config_file}", fg=Color.green)
 
 
 @cli.command(help="Generate schema and generate app migrate location.")
 @click.option(
+    "-s",
     "--safe",
+    type=bool,
     is_flag=True,
     default=True,
     help="When set to true, creates the table only when it does not already exist.",
     show_default=True,
 )
 @click.pass_context
-async def init_db(ctx: Context, safe):
-    config = ctx.obj["config"]
-    location = ctx.obj["location"]
-    app = ctx.obj["app"]
-
-    dirname = os.path.join(location, app)
-    if not os.path.isdir(dirname):
-        os.mkdir(dirname)
+@coro
+async def init_db(ctx: Context, safe: bool):
+    command = ctx.obj["command"]
+    app = command.app
+    dirname = Path(command.location, app)
+    try:
+        await command.init_db(safe)
         click.secho(f"Success create app migrate location {dirname}", fg=Color.green)
+        click.secho(f'Success generate schema for app "{app}"', fg=Color.green)
+    except FileExistsError:
+        return click.secho(
+            f"Inited {app} already, or delete {dirname} and try again.", fg=Color.yellow
+        )
 
-    Migrate.write_old_models(config, app, location)
 
-    await Tortoise.init(config=config)
-    connection = get_app_connection(config, app)
-    await generate_schema_for_client(connection, safe)
-
-    return click.secho(f'Success generate schema for app "{app}"', fg=Color.green)
+@cli.command(help="Introspects the database tables to standard output as TortoiseORM model.")
+@click.option(
+    "-t",
+    "--table",
+    help="Which tables to inspect.",
+    multiple=True,
+    required=False,
+)
+@click.pass_context
+@coro
+async def inspectdb(ctx: Context, table: List[str]):
+    command = ctx.obj["command"]
+    ret = await command.inspectdb(table)
+    click.secho(ret)
 
 
 def main():
-    sys.path.insert(0, ".")
-    cli(_anyio_backend="asyncio")
+    cli()
+
+
+if __name__ == "__main__":
+    main()

aerich/coder.py

@@ -0,0 +1,31 @@
+import base64
+import json
+import pickle  # nosec: B301,B403
+
+from tortoise.indexes import Index
+
+
+class JsonEncoder(json.JSONEncoder):
+    def default(self, obj):
+        if isinstance(obj, Index):
+            return {
+                "type": "index",
+                "val": base64.b64encode(pickle.dumps(obj)).decode(),  # nosec: B301
+            }
+        else:
+            return super().default(obj)
+
+
+def object_hook(obj):
+    _type = obj.get("type")
+    if not _type:
+        return obj
+    return pickle.loads(base64.b64decode(obj["val"]))  # nosec: B301
+
+
+def encoder(obj: dict):
+    return json.dumps(obj, cls=JsonEncoder)
+
+
+def decoder(obj: str):
+    return json.loads(obj, object_hook=object_hook)

aerich/ddl/__init__.py

@@ -1,67 +1,97 @@
+from enum import Enum
 from typing import List, Type
 
-from tortoise import BaseDBAsyncClient, ForeignKeyFieldInstance, ManyToManyFieldInstance, Model
+from tortoise import BaseDBAsyncClient, Model
 from tortoise.backends.base.schema_generator import BaseSchemaGenerator
-from tortoise.fields import Field, JSONField, TextField, UUIDField
+
+from aerich.utils import is_default_function
 
 
 class BaseDDL:
     schema_generator_cls: Type[BaseSchemaGenerator] = BaseSchemaGenerator
     DIALECT = "sql"
-    _DROP_TABLE_TEMPLATE = "DROP TABLE IF EXISTS {table_name}"
-    _ADD_COLUMN_TEMPLATE = "ALTER TABLE {table_name} ADD {column}"
-    _DROP_COLUMN_TEMPLATE = "ALTER TABLE {table_name} DROP COLUMN {column_name}"
-    _ADD_INDEX_TEMPLATE = (
-        "ALTER TABLE {table_name} ADD {unique} INDEX {index_name} ({column_names})"
+    _DROP_TABLE_TEMPLATE = 'DROP TABLE IF EXISTS "{table_name}"'
+    _ADD_COLUMN_TEMPLATE = 'ALTER TABLE "{table_name}" ADD {column}'
+    _DROP_COLUMN_TEMPLATE = 'ALTER TABLE "{table_name}" DROP COLUMN "{column_name}"'
+    _ALTER_DEFAULT_TEMPLATE = 'ALTER TABLE "{table_name}" ALTER COLUMN "{column}" {default}'
+    _RENAME_COLUMN_TEMPLATE = (
+        'ALTER TABLE "{table_name}" RENAME COLUMN "{old_column_name}" TO "{new_column_name}"'
     )
-    _DROP_INDEX_TEMPLATE = "ALTER TABLE {table_name} DROP INDEX {index_name}"
-    _ADD_FK_TEMPLATE = "ALTER TABLE {table_name} ADD CONSTRAINT `{fk_name}` FOREIGN KEY (`{db_column}`) REFERENCES `{table}` (`{field}`) ON DELETE {on_delete}"
-    _DROP_FK_TEMPLATE = "ALTER TABLE {table_name} DROP FOREIGN KEY {fk_name}"
-    _M2M_TABLE_TEMPLATE = "CREATE TABLE {table_name} ({backward_key} {backward_type} NOT NULL REFERENCES {backward_table} ({backward_field}) ON DELETE CASCADE,{forward_key} {forward_type} NOT NULL REFERENCES {forward_table} ({forward_field}) ON DELETE CASCADE){extra}{comment};"
+    _ADD_INDEX_TEMPLATE = (
+        'ALTER TABLE "{table_name}" ADD {unique}INDEX "{index_name}" ({column_names})'
+    )
+    _DROP_INDEX_TEMPLATE = 'ALTER TABLE "{table_name}" DROP INDEX "{index_name}"'
+    _ADD_FK_TEMPLATE = 'ALTER TABLE "{table_name}" ADD CONSTRAINT "{fk_name}" FOREIGN KEY ("{db_column}") REFERENCES "{table}" ("{field}") ON DELETE {on_delete}'
+    _DROP_FK_TEMPLATE = 'ALTER TABLE "{table_name}" DROP FOREIGN KEY "{fk_name}"'
+    _M2M_TABLE_TEMPLATE = (
+        'CREATE TABLE "{table_name}" (\n'
+        '    "{backward_key}" {backward_type} NOT NULL REFERENCES "{backward_table}" ("{backward_field}") ON DELETE CASCADE,\n'
+        '    "{forward_key}" {forward_type} NOT NULL REFERENCES "{forward_table}" ("{forward_field}") ON DELETE {on_delete}\n'
+        "){extra}{comment}"
+    )
+    _MODIFY_COLUMN_TEMPLATE = 'ALTER TABLE "{table_name}" MODIFY COLUMN {column}'
+    _CHANGE_COLUMN_TEMPLATE = (
+        'ALTER TABLE "{table_name}" CHANGE {old_column_name} {new_column_name} {new_column_type}'
+    )
+    _RENAME_TABLE_TEMPLATE = 'ALTER TABLE "{old_table_name}" RENAME TO "{new_table_name}"'
 
     def __init__(self, client: "BaseDBAsyncClient"):
         self.client = client
         self.schema_generator = self.schema_generator_cls(client)
 
     def create_table(self, model: "Type[Model]"):
-        return self.schema_generator._get_table_sql(model, True)["table_creation_string"]
+        return self.schema_generator._get_table_sql(model, True)["table_creation_string"].rstrip(
+            ";"
+        )
 
-    def drop_table(self, model: "Type[Model]"):
-        return self._DROP_TABLE_TEMPLATE.format(table_name=model._meta.db_table)
+    def drop_table(self, table_name: str):
+        return self._DROP_TABLE_TEMPLATE.format(table_name=table_name)
 
-    def create_m2m_table(self, model: "Type[Model]", field: ManyToManyFieldInstance):
+    def create_m2m(
+        self, model: "Type[Model]", field_describe: dict, reference_table_describe: dict
+    ):
+        through = field_describe.get("through")
+        description = field_describe.get("description")
+        reference_id = reference_table_describe.get("pk_field").get("db_column")
+        db_field_types = reference_table_describe.get("pk_field").get("db_field_types")
         return self._M2M_TABLE_TEMPLATE.format(
-            table_name=field.through,
+            table_name=through,
             backward_table=model._meta.db_table,
-            forward_table=field.related_model._meta.db_table,
+            forward_table=reference_table_describe.get("table"),
             backward_field=model._meta.db_pk_column,
-            forward_field=field.related_model._meta.db_pk_column,
-            backward_key=field.backward_key,
+            forward_field=reference_id,
+            backward_key=field_describe.get("backward_key"),
             backward_type=model._meta.pk.get_for_dialect(self.DIALECT, "SQL_TYPE"),
-            forward_key=field.forward_key,
-            forward_type=field.related_model._meta.pk.get_for_dialect(self.DIALECT, "SQL_TYPE"),
-            extra=self.schema_generator._table_generate_extra(table=field.through),
+            forward_key=field_describe.get("forward_key"),
+            forward_type=db_field_types.get(self.DIALECT) or db_field_types.get(""),
+            on_delete=field_describe.get("on_delete"),
+            extra=self.schema_generator._table_generate_extra(table=through),
             comment=self.schema_generator._table_comment_generator(
-                table=field.through, comment=field.description
+                table=through, comment=description
             )
-            if field.description
+            if description
             else "",
         )
 
-    def drop_m2m(self, field: ManyToManyFieldInstance):
-        return self._DROP_TABLE_TEMPLATE.format(table_name=field.through)
+    def drop_m2m(self, table_name: str):
+        return self._DROP_TABLE_TEMPLATE.format(table_name=table_name)
 
-    def add_column(self, model: "Type[Model]", field_object: Field):
+    def _get_default(self, model: "Type[Model]", field_describe: dict):
         db_table = model._meta.db_table
-        default = field_object.default
-        db_column = field_object.model_field_name
-        auto_now_add = getattr(field_object, "auto_now_add", False)
-        auto_now = getattr(field_object, "auto_now", False)
+        default = field_describe.get("default")
+        if isinstance(default, Enum):
+            default = default.value
+        db_column = field_describe.get("db_column")
+        auto_now_add = field_describe.get("auto_now_add", False)
+        auto_now = field_describe.get("auto_now", False)
         if default is not None or auto_now_add:
-            if callable(default) or isinstance(field_object, (UUIDField, TextField, JSONField)):
+            if field_describe.get("field_type") in [
+                "UUIDField",
+                "TextField",
+                "JSONField",
+            ] or is_default_function(default):
                 default = ""
             else:
-                default = field_object.to_db_value(default, model)
                 try:
                     default = self.schema_generator._column_default_generator(
                         db_table,
@@ -73,22 +103,32 @@ class BaseDDL:
                 except NotImplementedError:
                     default = ""
         else:
+            default = None
+        return default
+
+    def add_column(self, model: "Type[Model]", field_describe: dict, is_pk: bool = False):
+        db_table = model._meta.db_table
+        description = field_describe.get("description")
+        db_column = field_describe.get("db_column")
+        db_field_types = field_describe.get("db_field_types")
+        default = self._get_default(model, field_describe)
+        if default is None:
             default = ""
         return self._ADD_COLUMN_TEMPLATE.format(
             table_name=db_table,
             column=self.schema_generator._create_string(
-                db_column=field_object.model_field_name,
-                field_type=field_object.get_for_dialect(self.DIALECT, "SQL_TYPE"),
-                nullable="NOT NULL" if not field_object.null else "",
-                unique="UNIQUE" if field_object.unique else "",
+                db_column=db_column,
+                field_type=db_field_types.get(self.DIALECT, db_field_types.get("")),
+                nullable="NOT NULL" if not field_describe.get("nullable") else "",
+                unique="UNIQUE" if field_describe.get("unique") else "",
                 comment=self.schema_generator._column_comment_generator(
                     table=db_table,
-                    column=field_object.model_field_name,
-                    comment=field_object.description,
+                    column=db_column,
+                    comment=field_describe.get("description"),
                 )
-                if field_object.description
+                if description
                 else "",
-                is_primary_key=field_object.pk,
+                is_primary_key=is_pk,
                 default=default,
             ),
         )
@@ -98,14 +138,56 @@ class BaseDDL:
             table_name=model._meta.db_table, column_name=column_name
         )
 
+    def modify_column(self, model: "Type[Model]", field_describe: dict, is_pk: bool = False):
+        db_table = model._meta.db_table
+        db_field_types = field_describe.get("db_field_types")
+        default = self._get_default(model, field_describe)
+        if default is None:
+            default = ""
+        return self._MODIFY_COLUMN_TEMPLATE.format(
+            table_name=db_table,
+            column=self.schema_generator._create_string(
+                db_column=field_describe.get("db_column"),
+                field_type=db_field_types.get(self.DIALECT) or db_field_types.get(""),
+                nullable="NOT NULL" if not field_describe.get("nullable") else "",
+                unique="",
+                comment=self.schema_generator._column_comment_generator(
+                    table=db_table,
+                    column=field_describe.get("db_column"),
+                    comment=field_describe.get("description"),
+                )
+                if field_describe.get("description")
+                else "",
+                is_primary_key=is_pk,
+                default=default,
+            ),
+        )
+
+    def rename_column(self, model: "Type[Model]", old_column_name: str, new_column_name: str):
+        return self._RENAME_COLUMN_TEMPLATE.format(
+            table_name=model._meta.db_table,
+            old_column_name=old_column_name,
+            new_column_name=new_column_name,
+        )
+
+    def change_column(
+        self, model: "Type[Model]", old_column_name: str, new_column_name: str, new_column_type: str
+    ):
+        return self._CHANGE_COLUMN_TEMPLATE.format(
+            table_name=model._meta.db_table,
+            old_column_name=old_column_name,
+            new_column_name=new_column_name,
+            new_column_type=new_column_type,
+        )
+
     def add_index(self, model: "Type[Model]", field_names: List[str], unique=False):
         return self._ADD_INDEX_TEMPLATE.format(
-            unique="UNIQUE" if unique else "",
+            unique="UNIQUE " if unique else "",
             index_name=self.schema_generator._generate_index_name(
                 "idx" if not unique else "uid", model, field_names
             ),
             table_name=model._meta.db_table,
-            column_names=", ".join([self.schema_generator.quote(f) for f in field_names]),
+            column_names=", ".join(self.schema_generator.quote(f) for f in field_names),
         )
 
     def drop_index(self, model: "Type[Model]", field_names: List[str], unique=False):
@@ -116,39 +198,61 @@ class BaseDDL:
             table_name=model._meta.db_table,
         )
 
-    def add_fk(self, model: "Type[Model]", field: ForeignKeyFieldInstance):
-        db_table = model._meta.db_table
-        to_field_name = field.to_field_instance.source_field
-        if not to_field_name:
-            to_field_name = field.to_field_instance.model_field_name
+    def drop_index_by_name(self, model: "Type[Model]", index_name: str):
+        return self._DROP_INDEX_TEMPLATE.format(
+            index_name=index_name,
+            table_name=model._meta.db_table,
+        )
 
-        db_column = field.source_field or field.model_field_name + "_id"
+    def add_fk(self, model: "Type[Model]", field_describe: dict, reference_table_describe: dict):
+        db_table = model._meta.db_table
+
+        db_column = field_describe.get("raw_field")
+        reference_id = reference_table_describe.get("pk_field").get("db_column")
         fk_name = self.schema_generator._generate_fk_name(
             from_table=db_table,
             from_field=db_column,
-            to_table=field.related_model._meta.db_table,
-            to_field=to_field_name,
+            to_table=reference_table_describe.get("table"),
+            to_field=reference_table_describe.get("pk_field").get("db_column"),
         )
         return self._ADD_FK_TEMPLATE.format(
             table_name=db_table,
             fk_name=fk_name,
             db_column=db_column,
-            table=field.related_model._meta.db_table,
-            field=to_field_name,
-            on_delete=field.on_delete,
+            table=reference_table_describe.get("table"),
+            field=reference_id,
+            on_delete=field_describe.get("on_delete"),
         )
 
-    def drop_fk(self, model: "Type[Model]", field: ForeignKeyFieldInstance):
-        to_field_name = field.to_field_instance.source_field
-        if not to_field_name:
-            to_field_name = field.to_field_instance.model_field_name
+    def drop_fk(self, model: "Type[Model]", field_describe: dict, reference_table_describe: dict):
         db_table = model._meta.db_table
         return self._DROP_FK_TEMPLATE.format(
             table_name=db_table,
             fk_name=self.schema_generator._generate_fk_name(
                 from_table=db_table,
-                from_field=field.source_field or field.model_field_name + "_id",
-                to_table=field.related_model._meta.db_table,
-                to_field=to_field_name,
+                from_field=field_describe.get("raw_field"),
+                to_table=reference_table_describe.get("table"),
+                to_field=reference_table_describe.get("pk_field").get("db_column"),
             ),
         )
+
+    def alter_column_default(self, model: "Type[Model]", field_describe: dict):
+        db_table = model._meta.db_table
+        default = self._get_default(model, field_describe)
+        return self._ALTER_DEFAULT_TEMPLATE.format(
+            table_name=db_table,
+            column=field_describe.get("db_column"),
+            default="SET" + default if default is not None else "DROP DEFAULT",
+        )
+
+    def alter_column_null(self, model: "Type[Model]", field_describe: dict):
+        return self.modify_column(model, field_describe)
+
+    def set_comment(self, model: "Type[Model]", field_describe: dict):
+        return self.modify_column(model, field_describe)
+
+    def rename_table(self, model: "Type[Model]", old_table_name: str, new_table_name: str):
+        db_table = model._meta.db_table
+        return self._RENAME_TABLE_TEMPLATE.format(
+            table_name=db_table, old_table_name=old_table_name, new_table_name=new_table_name
+        )

aerich/ddl/mysql/__init__.py

@@ -6,3 +6,27 @@ from aerich.ddl import BaseDDL
 class MysqlDDL(BaseDDL):
     schema_generator_cls = MySQLSchemaGenerator
     DIALECT = MySQLSchemaGenerator.DIALECT
+    _DROP_TABLE_TEMPLATE = "DROP TABLE IF EXISTS `{table_name}`"
+    _ADD_COLUMN_TEMPLATE = "ALTER TABLE `{table_name}` ADD {column}"
+    _ALTER_DEFAULT_TEMPLATE = "ALTER TABLE `{table_name}` ALTER COLUMN `{column}` {default}"
+    _CHANGE_COLUMN_TEMPLATE = (
+        "ALTER TABLE `{table_name}` CHANGE {old_column_name} {new_column_name} {new_column_type}"
+    )
+    _DROP_COLUMN_TEMPLATE = "ALTER TABLE `{table_name}` DROP COLUMN `{column_name}`"
+    _RENAME_COLUMN_TEMPLATE = (
+        "ALTER TABLE `{table_name}` RENAME COLUMN `{old_column_name}` TO `{new_column_name}`"
+    )
+    _ADD_INDEX_TEMPLATE = (
+        "ALTER TABLE `{table_name}` ADD {unique}INDEX `{index_name}` ({column_names})"
+    )
+    _DROP_INDEX_TEMPLATE = "ALTER TABLE `{table_name}` DROP INDEX `{index_name}`"
+    _ADD_FK_TEMPLATE = "ALTER TABLE `{table_name}` ADD CONSTRAINT `{fk_name}` FOREIGN KEY (`{db_column}`) REFERENCES `{table}` (`{field}`) ON DELETE {on_delete}"
+    _DROP_FK_TEMPLATE = "ALTER TABLE `{table_name}` DROP FOREIGN KEY `{fk_name}`"
+    _M2M_TABLE_TEMPLATE = (
+        "CREATE TABLE `{table_name}` (\n"
+        "    `{backward_key}` {backward_type} NOT NULL REFERENCES `{backward_table}` (`{backward_field}`) ON DELETE CASCADE,\n"
+        "    `{forward_key}` {forward_type} NOT NULL REFERENCES `{forward_table}` (`{forward_field}`) ON DELETE CASCADE\n"
+        "){extra}{comment}"
+    )
+    _MODIFY_COLUMN_TEMPLATE = "ALTER TABLE `{table_name}` MODIFY COLUMN {column}"
+    _RENAME_TABLE_TEMPLATE = "ALTER TABLE `{old_table_name}` RENAME TO `{new_table_name}`"

aerich/ddl/postgres/__init__.py

@@ -1,3 +1,6 @@
+from typing import Type
+
+from tortoise import Model
 from tortoise.backends.asyncpg.schema_generator import AsyncpgSchemaGenerator
 
 from aerich.ddl import BaseDDL
@@ -6,3 +9,41 @@ from aerich.ddl import BaseDDL
 class PostgresDDL(BaseDDL):
     schema_generator_cls = AsyncpgSchemaGenerator
     DIALECT = AsyncpgSchemaGenerator.DIALECT
+    _ADD_INDEX_TEMPLATE = 'CREATE {unique}INDEX "{index_name}" ON "{table_name}" ({column_names})'
+    _DROP_INDEX_TEMPLATE = 'DROP INDEX "{index_name}"'
+    _ALTER_NULL_TEMPLATE = 'ALTER TABLE "{table_name}" ALTER COLUMN "{column}" {set_drop} NOT NULL'
+    _MODIFY_COLUMN_TEMPLATE = (
+        'ALTER TABLE "{table_name}" ALTER COLUMN "{column}" TYPE {datatype}{using}'
+    )
+    _SET_COMMENT_TEMPLATE = 'COMMENT ON COLUMN "{table_name}"."{column}" IS {comment}'
+    _DROP_FK_TEMPLATE = 'ALTER TABLE "{table_name}" DROP CONSTRAINT "{fk_name}"'
+
+    def alter_column_null(self, model: "Type[Model]", field_describe: dict):
+        db_table = model._meta.db_table
+        return self._ALTER_NULL_TEMPLATE.format(
+            table_name=db_table,
+            column=field_describe.get("db_column"),
+            set_drop="DROP" if field_describe.get("nullable") else "SET",
+        )
+
+    def modify_column(self, model: "Type[Model]", field_describe: dict, is_pk: bool = False):
+        db_table = model._meta.db_table
+        db_field_types = field_describe.get("db_field_types")
+        db_column = field_describe.get("db_column")
+        datatype = db_field_types.get(self.DIALECT) or db_field_types.get("")
+        return self._MODIFY_COLUMN_TEMPLATE.format(
+            table_name=db_table,
+            column=db_column,
+            datatype=datatype,
+            using=f' USING "{db_column}"::{datatype}',
+        )
+
+    def set_comment(self, model: "Type[Model]", field_describe: dict):
+        db_table = model._meta.db_table
+        return self._SET_COMMENT_TEMPLATE.format(
+            table_name=db_table,
+            column=field_describe.get("db_column") or field_describe.get("raw_field"),
+            comment="'{}'".format(field_describe.get("description"))
+            if field_describe.get("description")
+            else "NULL",
+        )

aerich/ddl/sqlite/__init__.py

@@ -1,8 +1,24 @@
+from typing import Type
+
+from tortoise import Model
 from tortoise.backends.sqlite.schema_generator import SqliteSchemaGenerator
 
 from aerich.ddl import BaseDDL
+from aerich.exceptions import NotSupportError
 
 
 class SqliteDDL(BaseDDL):
     schema_generator_cls = SqliteSchemaGenerator
     DIALECT = SqliteSchemaGenerator.DIALECT
+
+    def modify_column(self, model: "Type[Model]", field_object: dict, is_pk: bool = True):
+        raise NotSupportError("Modify column is unsupported in SQLite.")
+
+    def alter_column_default(self, model: "Type[Model]", field_describe: dict):
+        raise NotSupportError("Alter column default is unsupported in SQLite.")
+
+    def alter_column_null(self, model: "Type[Model]", field_describe: dict):
+        raise NotSupportError("Alter column null is unsupported in SQLite.")
+
+    def set_comment(self, model: "Type[Model]", field_describe: dict):
+        raise NotSupportError("Alter column comment is unsupported in SQLite.")

aerich/enums.py

@@ -0,0 +1,7 @@
+from enum import Enum
+
+
+class Color(str, Enum):
+    green = "green"
+    red = "red"
+    yellow = "yellow"

aerich/exceptions.py

@@ -1,6 +1,10 @@
-class ConfigurationError(Exception):
+class NotSupportError(Exception):
     """
-    config error
+    raise when features not support
     """
 
-    pass
+
+class DowngradeError(Exception):
+    """
+    raise when downgrade error
+    """

aerich/inspectdb/__init__.py

@@ -0,0 +1,168 @@
+from typing import Any, List, Optional
+
+from pydantic import BaseModel
+from tortoise import BaseDBAsyncClient
+
+
+class Column(BaseModel):
+    name: str
+    data_type: str
+    null: bool
+    default: Any
+    comment: Optional[str]
+    pk: bool
+    unique: bool
+    index: bool
+    length: Optional[int]
+    extra: Optional[str]
+    decimal_places: Optional[int]
+    max_digits: Optional[int]
+
+    def translate(self) -> dict:
+        comment = default = length = index = null = pk = ""
+        if self.pk:
+            pk = "pk=True, "
+        else:
+            if self.unique:
+                index = "unique=True, "
+            else:
+                if self.index:
+                    index = "index=True, "
+        if self.data_type in ["varchar", "VARCHAR"]:
+            length = f"max_length={self.length}, "
+        if self.data_type in ["decimal", "numeric"]:
+            length_parts = []
+            if self.max_digits:
+                length_parts.append(f"max_digits={self.max_digits}")
+            if self.decimal_places:
+                length_parts.append(f"decimal_places={self.decimal_places}")
+            length = ", ".join(length_parts)
+        if self.null:
+            null = "null=True, "
+        if self.default is not None:
+            if self.data_type in ["tinyint", "INT"]:
+                default = f"default={'True' if self.default == '1' else 'False'}, "
+            elif self.data_type == "bool":
+                default = f"default={'True' if self.default == 'true' else 'False'}, "
+            elif self.data_type in ["datetime", "timestamptz", "TIMESTAMP"]:
+                if "CURRENT_TIMESTAMP" == self.default:
+                    if "DEFAULT_GENERATED on update CURRENT_TIMESTAMP" == self.extra:
+                        default = "auto_now=True, "
+                    else:
+                        default = "auto_now_add=True, "
+            else:
+                if "::" in self.default:
+                    default = f"default={self.default.split('::')[0]}, "
+                elif self.default.endswith("()"):
+                    default = ""
+                else:
+                    default = f"default={self.default}, "
+
+        if self.comment:
+            comment = f"description='{self.comment}', "
+        return {
+            "name": self.name,
+            "pk": pk,
+            "index": index,
+            "null": null,
+            "default": default,
+            "length": length,
+            "comment": comment,
+        }
+
+
+class Inspect:
+    _table_template = "class {table}(Model):\n"
+
+    def __init__(self, conn: BaseDBAsyncClient, tables: Optional[List[str]] = None):
+        self.conn = conn
+        try:
+            self.database = conn.database
+        except AttributeError:
+            pass
+        self.tables = tables
+
+    @property
+    def field_map(self) -> dict:
+        raise NotImplementedError
+
+    async def inspect(self) -> str:
+        if not self.tables:
+            self.tables = await self.get_all_tables()
+        result = "from tortoise import Model, fields\n\n\n"
+        tables = []
+        for table in self.tables:
+            columns = await self.get_columns(table)
+            fields = []
+            model = self._table_template.format(table=table.title().replace("_", ""))
+            for column in columns:
+                field = self.field_map[column.data_type](**column.translate())
+                fields.append("    " + field)
+            tables.append(model + "\n".join(fields))
+        return result + "\n\n\n".join(tables)
+
+    async def get_columns(self, table: str) -> List[Column]:
+        raise NotImplementedError
+
+    async def get_all_tables(self) -> List[str]:
+        raise NotImplementedError
+
+    @classmethod
+    def decimal_field(cls, **kwargs) -> str:
+        return "{name} = fields.DecimalField({pk}{index}{length}{null}{default}{comment})".format(
+            **kwargs
+        )
+
+    @classmethod
+    def time_field(cls, **kwargs) -> str:
+        return "{name} = fields.TimeField({null}{default}{comment})".format(**kwargs)
+
+    @classmethod
+    def date_field(cls, **kwargs) -> str:
+        return "{name} = fields.DateField({null}{default}{comment})".format(**kwargs)
+
+    @classmethod
+    def float_field(cls, **kwargs) -> str:
+        return "{name} = fields.FloatField({null}{default}{comment})".format(**kwargs)
+
+    @classmethod
+    def datetime_field(cls, **kwargs) -> str:
+        return "{name} = fields.DatetimeField({null}{default}{comment})".format(**kwargs)
+
+    @classmethod
+    def text_field(cls, **kwargs) -> str:
+        return "{name} = fields.TextField({null}{default}{comment})".format(**kwargs)
+
+    @classmethod
+    def char_field(cls, **kwargs) -> str:
+        return "{name} = fields.CharField({pk}{index}{length}{null}{default}{comment})".format(
+            **kwargs
+        )
+
+    @classmethod
+    def int_field(cls, **kwargs) -> str:
+        return "{name} = fields.IntField({pk}{index}{comment})".format(**kwargs)
+
+    @classmethod
+    def smallint_field(cls, **kwargs) -> str:
+        return "{name} = fields.SmallIntField({pk}{index}{comment})".format(**kwargs)
+
+    @classmethod
+    def bigint_field(cls, **kwargs) -> str:
+        return "{name} = fields.BigIntField({pk}{index}{default}{comment})".format(**kwargs)
+
+    @classmethod
+    def bool_field(cls, **kwargs) -> str:
+        return "{name} = fields.BooleanField({null}{default}{comment})".format(**kwargs)
+
+    @classmethod
+    def uuid_field(cls, **kwargs) -> str:
+        return "{name} = fields.UUIDField({pk}{index}{default}{comment})".format(**kwargs)
+
+    @classmethod
+    def json_field(cls, **kwargs) -> str:
+        return "{name} = fields.JSONField({null}{default}{comment})".format(**kwargs)
+
+    @classmethod
+    def binary_field(cls, **kwargs) -> str:
+        return "{name} = fields.BinaryField({null}{default}{comment})".format(**kwargs)

aerich/inspectdb/mysql.py

@@ -0,0 +1,69 @@
+from typing import List
+
+from aerich.inspectdb import Column, Inspect
+
+
+class InspectMySQL(Inspect):
+    @property
+    def field_map(self) -> dict:
+        return {
+            "int": self.int_field,
+            "smallint": self.smallint_field,
+            "tinyint": self.bool_field,
+            "bigint": self.bigint_field,
+            "varchar": self.char_field,
+            "longtext": self.text_field,
+            "text": self.text_field,
+            "datetime": self.datetime_field,
+            "float": self.float_field,
+            "date": self.date_field,
+            "time": self.time_field,
+            "decimal": self.decimal_field,
+            "json": self.json_field,
+            "longblob": self.binary_field,
+        }
+
+    async def get_all_tables(self) -> List[str]:
+        sql = "select TABLE_NAME from information_schema.TABLES where TABLE_SCHEMA=%s"
+        ret = await self.conn.execute_query_dict(sql, [self.database])
+        return list(map(lambda x: x["TABLE_NAME"], ret))
+
+    async def get_columns(self, table: str) -> List[Column]:
+        columns = []
+        sql = """select c.*, s.NON_UNIQUE, s.INDEX_NAME
+from information_schema.COLUMNS c
+         left join information_schema.STATISTICS s on c.TABLE_NAME = s.TABLE_NAME
+    and c.TABLE_SCHEMA = s.TABLE_SCHEMA
+    and c.COLUMN_NAME = s.COLUMN_NAME
+where c.TABLE_SCHEMA = %s
+  and c.TABLE_NAME = %s"""
+        ret = await self.conn.execute_query_dict(sql, [self.database, table])
+        for row in ret:
+            non_unique = row["NON_UNIQUE"]
+            if non_unique is None:
+                unique = False
+            else:
+                unique = not non_unique
+            index_name = row["INDEX_NAME"]
+            if index_name is None:
+                index = False
+            else:
+                index = row["INDEX_NAME"] != "PRIMARY"
+            columns.append(
+                Column(
+                    name=row["COLUMN_NAME"],
+                    data_type=row["DATA_TYPE"],
+                    null=row["IS_NULLABLE"] == "YES",
+                    default=row["COLUMN_DEFAULT"],
+                    pk=row["COLUMN_KEY"] == "PRI",
+                    comment=row["COLUMN_COMMENT"],
+                    unique=row["COLUMN_KEY"] == "UNI",
+                    extra=row["EXTRA"],
+                    unque=unique,
+                    index=index,
+                    length=row["CHARACTER_MAXIMUM_LENGTH"],
+                    max_digits=row["NUMERIC_PRECISION"],
+                    decimal_places=row["NUMERIC_SCALE"],
+                )
+            )
+        return columns

aerich/inspectdb/postgres.py

@@ -0,0 +1,76 @@
+from typing import List, Optional
+
+from tortoise import BaseDBAsyncClient
+
+from aerich.inspectdb import Column, Inspect
+
+
+class InspectPostgres(Inspect):
+    def __init__(self, conn: BaseDBAsyncClient, tables: Optional[List[str]] = None):
+        super().__init__(conn, tables)
+        self.schema = self.conn.server_settings.get("schema") or "public"
+
+    @property
+    def field_map(self) -> dict:
+        return {
+            "int4": self.int_field,
+            "int8": self.int_field,
+            "smallint": self.smallint_field,
+            "varchar": self.char_field,
+            "text": self.text_field,
+            "bigint": self.bigint_field,
+            "timestamptz": self.datetime_field,
+            "float4": self.float_field,
+            "float8": self.float_field,
+            "date": self.date_field,
+            "time": self.time_field,
+            "decimal": self.decimal_field,
+            "numeric": self.decimal_field,
+            "uuid": self.uuid_field,
+            "jsonb": self.json_field,
+            "bytea": self.binary_field,
+            "bool": self.bool_field,
+            "timestamp": self.datetime_field,
+        }
+
+    async def get_all_tables(self) -> List[str]:
+        sql = "select TABLE_NAME from information_schema.TABLES where table_catalog=$1 and table_schema=$2"
+        ret = await self.conn.execute_query_dict(sql, [self.database, self.schema])
+        return list(map(lambda x: x["table_name"], ret))
+
+    async def get_columns(self, table: str) -> List[Column]:
+        columns = []
+        sql = f"""select c.column_name,
+       col_description('public.{table}'::regclass, ordinal_position) as column_comment,
+       t.constraint_type as column_key,
+       udt_name as data_type,
+       is_nullable,
+       column_default,
+       character_maximum_length,
+       numeric_precision,
+       numeric_scale
+from information_schema.constraint_column_usage const
+         join information_schema.table_constraints t
+              using (table_catalog, table_schema, table_name, constraint_catalog, constraint_schema, constraint_name)
+         right join information_schema.columns c using (column_name, table_catalog, table_schema, table_name)
+where c.table_catalog = $1
+  and c.table_name = $2
+  and c.table_schema = $3"""
+        ret = await self.conn.execute_query_dict(sql, [self.database, table, self.schema])
+        for row in ret:
+            columns.append(
+                Column(
+                    name=row["column_name"],
+                    data_type=row["data_type"],
+                    null=row["is_nullable"] == "YES",
+                    default=row["column_default"],
+                    length=row["character_maximum_length"],
+                    max_digits=row["numeric_precision"],
+                    decimal_places=row["numeric_scale"],
+                    comment=row["column_comment"],
+                    pk=row["column_key"] == "PRIMARY KEY",
+                    unique=False,  # can't get this simply
+                    index=False,  # can't get this simply
+                )
+            )
+        return columns

aerich/inspectdb/sqlite.py

@@ -0,0 +1,61 @@
+from typing import List
+
+from aerich.inspectdb import Column, Inspect
+
+
+class InspectSQLite(Inspect):
+    @property
+    def field_map(self) -> dict:
+        return {
+            "INTEGER": self.int_field,
+            "INT": self.bool_field,
+            "SMALLINT": self.smallint_field,
+            "VARCHAR": self.char_field,
+            "TEXT": self.text_field,
+            "TIMESTAMP": self.datetime_field,
+            "REAL": self.float_field,
+            "BIGINT": self.bigint_field,
+            "DATE": self.date_field,
+            "TIME": self.time_field,
+            "JSON": self.json_field,
+            "BLOB": self.binary_field,
+        }
+
+    async def get_columns(self, table: str) -> List[Column]:
+        columns = []
+        sql = f"PRAGMA table_info({table})"
+        ret = await self.conn.execute_query_dict(sql)
+        columns_index = await self._get_columns_index(table)
+        for row in ret:
+            try:
+                length = row["type"].split("(")[1].split(")")[0]
+            except IndexError:
+                length = None
+            columns.append(
+                Column(
+                    name=row["name"],
+                    data_type=row["type"].split("(")[0],
+                    null=row["notnull"] == 0,
+                    default=row["dflt_value"],
+                    length=length,
+                    pk=row["pk"] == 1,
+                    unique=columns_index.get(row["name"]) == "unique",
+                    index=columns_index.get(row["name"]) == "index",
+                )
+            )
+        return columns
+
+    async def _get_columns_index(self, table: str):
+        sql = f"PRAGMA index_list ({table})"
+        indexes = await self.conn.execute_query_dict(sql)
+        ret = {}
+        for index in indexes:
+            sql = f"PRAGMA index_info({index['name']})"
+            index_info = (await self.conn.execute_query_dict(sql))[0]
+            ret[index_info["name"]] = "unique" if index["unique"] else "index"
+        return ret
+
+    async def get_all_tables(self) -> List[str]:
+        sql = "select tbl_name from sqlite_master where type='table' and name!='sqlite_sequence'"
+        ret = await self.conn.execute_query_dict(sql)
+        return list(map(lambda x: x["tbl_name"], ret))

aerich/migrate.py

@@ -1,23 +1,32 @@
-import json
+import importlib
 import os
-import re
-from copy import deepcopy
 from datetime import datetime
-from typing import Dict, List, Tuple, Type
+from hashlib import md5
+from pathlib import Path
+from typing import Dict, List, Optional, Tuple, Type, Union
 
-from tortoise import (
-    BackwardFKRelation,
-    BackwardOneToOneRelation,
-    ForeignKeyFieldInstance,
-    ManyToManyFieldInstance,
-    Model,
-    Tortoise,
-)
-from tortoise.fields import Field
+import click
+from dictdiffer import diff
+from tortoise import BaseDBAsyncClient, Model, Tortoise
+from tortoise.exceptions import OperationalError
+from tortoise.indexes import Index
 
 from aerich.ddl import BaseDDL
-from aerich.models import Aerich
-from aerich.utils import get_app_connection
+from aerich.models import MAX_VERSION_LENGTH, Aerich
+from aerich.utils import get_app_connection, get_models_describe, is_default_function
+
+MIGRATE_TEMPLATE = """from tortoise import BaseDBAsyncClient
+
+
+async def upgrade(db: BaseDBAsyncClient) -> str:
+    return \"\"\"
+        {upgrade_sql}\"\"\"
+
+
+async def downgrade(db: BaseDBAsyncClient) -> str:
+    return \"\"\"
+        {downgrade_sql}\"\"\"
+"""
 
 
 class Migrate:
@@ -27,71 +36,97 @@ class Migrate:
     _downgrade_fk_m2m_index_operators: List[str] = []
     _upgrade_m2m: List[str] = []
     _downgrade_m2m: List[str] = []
+    _aerich = Aerich.__name__
+    _rename_old = []
+    _rename_new = []
 
     ddl: BaseDDL
-    migrate_config: dict
-    old_models = "old_models"
-    diff_app = "diff_models"
+    _last_version_content: Optional[dict] = None
     app: str
-    migrate_location: str
-
-    @classmethod
-    def get_old_model_file(cls):
-        return cls.old_models + ".py"
+    migrate_location: Path
+    dialect: str
+    _db_version: Optional[str] = None
 
     @classmethod
     def get_all_version_files(cls) -> List[str]:
-        return sorted(filter(lambda x: x.endswith("json"), os.listdir(cls.migrate_location)))
+        return sorted(
+            filter(lambda x: x.endswith("py"), os.listdir(cls.migrate_location)),
+            key=lambda x: int(x.split("_")[0]),
+        )
 
     @classmethod
-    async def get_last_version(cls) -> Aerich:
-        return await Aerich.filter(app=cls.app).first()
+    def _get_model(cls, model: str) -> Type[Model]:
+        return Tortoise.apps.get(cls.app).get(model)
 
     @classmethod
-    async def init_with_old_models(cls, config: dict, app: str, location: str):
-        migrate_config = cls._get_migrate_config(config, app, location)
+    async def get_last_version(cls) -> Optional[Aerich]:
+        try:
+            return await Aerich.filter(app=cls.app).first()
+        except OperationalError:
+            pass
 
+    @classmethod
+    async def _get_db_version(cls, connection: BaseDBAsyncClient):
+        if cls.dialect == "mysql":
+            sql = "select version() as version"
+            ret = await connection.execute_query(sql)
+            cls._db_version = ret[1][0].get("version")
+
+    @classmethod
+    async def load_ddl_class(cls):
+        ddl_dialect_module = importlib.import_module(f"aerich.ddl.{cls.dialect}")
+        return getattr(ddl_dialect_module, f"{cls.dialect.capitalize()}DDL")
+
+    @classmethod
+    async def init(cls, config: dict, app: str, location: str):
+        await Tortoise.init(config=config)
+        last_version = await cls.get_last_version()
         cls.app = app
-        cls.migrate_config = migrate_config
-        cls.migrate_location = os.path.join(location, app)
-
-        await Tortoise.init(config=migrate_config)
+        cls.migrate_location = Path(location, app)
+        if last_version:
+            cls._last_version_content = last_version.content
 
         connection = get_app_connection(config, app)
-        if connection.schema_generator.DIALECT == "mysql":
-            from aerich.ddl.mysql import MysqlDDL
-
-            cls.ddl = MysqlDDL(connection)
-        elif connection.schema_generator.DIALECT == "sqlite":
-            from aerich.ddl.sqlite import SqliteDDL
-
-            cls.ddl = SqliteDDL(connection)
-        elif connection.schema_generator.DIALECT == "postgres":
-            from aerich.ddl.postgres import PostgresDDL
-
-            cls.ddl = PostgresDDL(connection)
-        else:
-            raise NotImplementedError("Current only support MySQL")
+        cls.dialect = connection.schema_generator.DIALECT
+        cls.ddl_class = await cls.load_ddl_class()
+        cls.ddl = cls.ddl_class(connection)
+        await cls._get_db_version(connection)
 
     @classmethod
     async def _get_last_version_num(cls):
         last_version = await cls.get_last_version()
         if not last_version:
-            return 0
+            return None
         version = last_version.version
-        return version.split("_")[0]
+        return int(version.split("_", 1)[0])
 
     @classmethod
-    async def _generate_diff_sql(cls, name):
-        now = datetime.now().strftime("%Y%M%D%H%M%S").replace("/", "")
+    async def generate_version(cls, name=None):
+        now = datetime.now().strftime("%Y%m%d%H%M%S").replace("/", "")
         last_version_num = await cls._get_last_version_num()
-        version = f"{last_version_num + 1}_{now}_{name}.json"
-        content = {
-            "upgrade": cls.upgrade_operators,
-            "downgrade": cls.downgrade_operators,
-        }
-        with open(os.path.join(cls.migrate_location, version), "w") as f:
-            json.dump(content, f, indent=2, ensure_ascii=False)
+        if last_version_num is None:
+            return f"0_{now}_init.py"
+        version = f"{last_version_num + 1}_{now}_{name}.py"
+        if len(version) > MAX_VERSION_LENGTH:
+            raise ValueError(f"Version name exceeds maximum length ({MAX_VERSION_LENGTH})")
+        return version
+
+    @classmethod
+    async def _generate_diff_py(cls, name):
+        version = await cls.generate_version(name)
+        # delete if same version exists
+        for version_file in cls.get_all_version_files():
+            if version_file.startswith(version.split("_")[0]):
+                os.unlink(Path(cls.migrate_location, version_file))
+
+        version_file = Path(cls.migrate_location, version)
+        content = MIGRATE_TEMPLATE.format(
+            upgrade_sql=";\n        ".join(cls.upgrade_operators) + ";",
+            downgrade_sql=";\n        ".join(cls.downgrade_operators) + ";",
+        )
+
+        with open(version_file, "w", encoding="utf-8") as f:
+            f.write(content)
         return version
 
     @classmethod
@@ -101,95 +136,52 @@ class Migrate:
         :param name:
         :return:
         """
-        apps = Tortoise.apps
-        diff_models = apps.get(cls.diff_app)
-        app_models = apps.get(cls.app)
-
-        cls._diff_models(diff_models, app_models)
-        cls._diff_models(app_models, diff_models, False)
+        new_version_content = get_models_describe(cls.app)
+        cls.diff_models(cls._last_version_content, new_version_content)
+        cls.diff_models(new_version_content, cls._last_version_content, False)
 
         cls._merge_operators()
 
         if not cls.upgrade_operators:
             return ""
 
-        return await cls._generate_diff_sql(name)
+        return await cls._generate_diff_py(name)
 
     @classmethod
-    def _add_operator(cls, operator: str, upgrade=True, fk=False):
+    def _add_operator(cls, operator: str, upgrade=True, fk_m2m_index=False):
         """
         add operator,differentiate fk because fk is order limit
         :param operator:
         :param upgrade:
-        :param fk_m2m:
+        :param fk_m2m_index:
         :return:
         """
+        operator = operator.rstrip(";")
         if upgrade:
-            if fk:
+            if fk_m2m_index:
                 cls._upgrade_fk_m2m_index_operators.append(operator)
             else:
                 cls.upgrade_operators.append(operator)
         else:
-            if fk:
+            if fk_m2m_index:
                 cls._downgrade_fk_m2m_index_operators.append(operator)
             else:
                 cls.downgrade_operators.append(operator)
 
     @classmethod
-    def cp_models(
-        cls, app: str, model_files: List[str], old_model_file,
-    ):
-        """
-        cp currents models to old_model_files
-        :param app:
-        :param model_files:
-        :param old_model_file:
-        :return:
-        """
-        pattern = rf"(\n)?('|\")({app})(.\w+)('|\")"
-        for i, model_file in enumerate(model_files):
-            with open(model_file, "r") as f:
-                content = f.read()
-            ret = re.sub(pattern, rf"\2{cls.diff_app}\4\5", content)
-            mode = "w" if i == 0 else "a"
-            with open(old_model_file, mode) as f:
-                f.write(ret)
+    def _handle_indexes(cls, model: Type[Model], indexes: List[Union[Tuple[str], Index]]):
+        ret = []
+        for index in indexes:
+            if isinstance(index, Index):
+                index.__hash__ = lambda self: md5(  # nosec: B303
+                    self.index_name(cls.ddl.schema_generator, model).encode()
+                    + self.__class__.__name__.encode()
+                ).hexdigest()
+            ret.append(index)
+        return ret
 
     @classmethod
-    def _get_migrate_config(cls, config: dict, app: str, location: str):
-        """
-        generate tmp config with old models
-        :param config:
-        :param app:
-        :param location:
-        :return:
-        """
-        temp_config = deepcopy(config)
-        path = os.path.join(location, app, cls.old_models)
-        path = path.replace("/", ".").lstrip(".")
-        temp_config["apps"][cls.diff_app] = {"models": [path]}
-        return temp_config
-
-    @classmethod
-    def write_old_models(cls, config: dict, app: str, location: str):
-        """
-        write new models to old models
-        :param config:
-        :param app:
-        :param location:
-        :return:
-        """
-        old_model_files = []
-        models = config.get("apps").get(app).get("models")
-        for model in models:
-            old_model_files.append(model.replace(".", "/") + ".py")
-
-        cls.cp_models(app, old_model_files, os.path.join(location, app, cls.get_old_model_file()))
-
-    @classmethod
-    def _diff_models(
-        cls, old_models: Dict[str, Type[Model]], new_models: Dict[str, Type[Model]], upgrade=True
-    ):
+    def diff_models(cls, old_models: Dict[str, dict], new_models: Dict[str, dict], upgrade=True):
         """
         diff models and add operators
         :param old_models:
@@ -197,177 +189,418 @@ class Migrate:
         :param upgrade:
         :return:
         """
-        for new_model_str, new_model in new_models.items():
+        _aerich = f"{cls.app}.{cls._aerich}"
+        old_models.pop(_aerich, None)
+        new_models.pop(_aerich, None)
+
+        for new_model_str, new_model_describe in new_models.items():
+            model = cls._get_model(new_model_describe.get("name").split(".")[1])
+
             if new_model_str not in old_models.keys():
-                cls._add_operator(cls.add_model(new_model), upgrade)
+                if upgrade:
+                    cls._add_operator(cls.add_model(model), upgrade)
+                else:
+                    # we can't find origin model when downgrade, so skip
+                    pass
             else:
-                cls.diff_model(old_models.get(new_model_str), new_model, upgrade)
+                old_model_describe = old_models.get(new_model_str)
+                # rename table
+                new_table = new_model_describe.get("table")
+                old_table = old_model_describe.get("table")
+                if new_table != old_table:
+                    cls._add_operator(cls.rename_table(model, old_table, new_table), upgrade)
+                old_unique_together = set(
+                    map(lambda x: tuple(x), old_model_describe.get("unique_together"))
+                )
+                new_unique_together = set(
+                    map(lambda x: tuple(x), new_model_describe.get("unique_together"))
+                )
+                old_indexes = set(
+                    map(
+                        lambda x: x if isinstance(x, Index) else tuple(x),
+                        cls._handle_indexes(model, old_model_describe.get("indexes", [])),
+                    )
+                )
+                new_indexes = set(
+                    map(
+                        lambda x: x if isinstance(x, Index) else tuple(x),
+                        cls._handle_indexes(model, new_model_describe.get("indexes", [])),
+                    )
+                )
+                old_pk_field = old_model_describe.get("pk_field")
+                new_pk_field = new_model_describe.get("pk_field")
+                # pk field
+                changes = diff(old_pk_field, new_pk_field)
+                for action, option, change in changes:
+                    # current only support rename pk
+                    if action == "change" and option == "name":
+                        cls._add_operator(cls._rename_field(model, *change), upgrade)
+                # m2m fields
+                old_m2m_fields = old_model_describe.get("m2m_fields")
+                new_m2m_fields = new_model_describe.get("m2m_fields")
+                for action, option, change in diff(old_m2m_fields, new_m2m_fields):
+                    if change[0][0] == "db_constraint":
+                        continue
+                    table = change[0][1].get("through")
+                    if action == "add":
+                        add = False
+                        if upgrade and table not in cls._upgrade_m2m:
+                            cls._upgrade_m2m.append(table)
+                            add = True
+                        elif not upgrade and table not in cls._downgrade_m2m:
+                            cls._downgrade_m2m.append(table)
+                            add = True
+                        if add:
+                            cls._add_operator(
+                                cls.create_m2m(
+                                    model,
+                                    change[0][1],
+                                    new_models.get(change[0][1].get("model_name")),
+                                ),
+                                upgrade,
+                                fk_m2m_index=True,
+                            )
+                    elif action == "remove":
+                        add = False
+                        if upgrade and table not in cls._upgrade_m2m:
+                            cls._upgrade_m2m.append(table)
+                            add = True
+                        elif not upgrade and table not in cls._downgrade_m2m:
+                            cls._downgrade_m2m.append(table)
+                            add = True
+                        if add:
+                            cls._add_operator(cls.drop_m2m(table), upgrade, True)
+                # add unique_together
+                for index in new_unique_together.difference(old_unique_together):
+                    cls._add_operator(cls._add_index(model, index, True), upgrade, True)
+                # remove unique_together
+                for index in old_unique_together.difference(new_unique_together):
+                    cls._add_operator(cls._drop_index(model, index, True), upgrade, True)
+                # add indexes
+                for index in new_indexes.difference(old_indexes):
+                    cls._add_operator(cls._add_index(model, index, False), upgrade, True)
+                # remove indexes
+                for index in old_indexes.difference(new_indexes):
+                    cls._add_operator(cls._drop_index(model, index, False), upgrade, True)
+                old_data_fields = list(
+                    filter(
+                        lambda x: x.get("db_field_types") is not None,
+                        old_model_describe.get("data_fields"),
+                    )
+                )
+                new_data_fields = list(
+                    filter(
+                        lambda x: x.get("db_field_types") is not None,
+                        new_model_describe.get("data_fields"),
+                    )
+                )
+
+                old_data_fields_name = list(map(lambda x: x.get("name"), old_data_fields))
+                new_data_fields_name = list(map(lambda x: x.get("name"), new_data_fields))
+
+                # add fields or rename fields
+                for new_data_field_name in set(new_data_fields_name).difference(
+                    set(old_data_fields_name)
+                ):
+                    new_data_field = next(
+                        filter(lambda x: x.get("name") == new_data_field_name, new_data_fields)
+                    )
+                    is_rename = False
+                    for old_data_field in old_data_fields:
+                        changes = list(diff(old_data_field, new_data_field))
+                        old_data_field_name = old_data_field.get("name")
+                        if len(changes) == 2:
+                            # rename field
+                            if (
+                                changes[0]
+                                == (
+                                    "change",
+                                    "name",
+                                    (old_data_field_name, new_data_field_name),
+                                )
+                                and changes[1]
+                                == (
+                                    "change",
+                                    "db_column",
+                                    (
+                                        old_data_field.get("db_column"),
+                                        new_data_field.get("db_column"),
+                                    ),
+                                )
+                                and old_data_field_name not in new_data_fields_name
+                            ):
+                                if upgrade:
+                                    is_rename = click.prompt(
+                                        f"Rename {old_data_field_name} to {new_data_field_name}?",
+                                        default=True,
+                                        type=bool,
+                                        show_choices=True,
+                                    )
+                                else:
+                                    is_rename = old_data_field_name in cls._rename_new
+                                if is_rename:
+                                    cls._rename_new.append(new_data_field_name)
+                                    cls._rename_old.append(old_data_field_name)
+                                    # only MySQL8+ has rename syntax
+                                    if (
+                                        cls.dialect == "mysql"
+                                        and cls._db_version
+                                        and cls._db_version.startswith("5.")
+                                    ):
+                                        cls._add_operator(
+                                            cls._change_field(
+                                                model, old_data_field, new_data_field
+                                            ),
+                                            upgrade,
+                                        )
+                                    else:
+                                        cls._add_operator(
+                                            cls._rename_field(model, *changes[1][2]),
+                                            upgrade,
+                                        )
+                    if not is_rename:
+                        cls._add_operator(
+                            cls._add_field(
+                                model,
+                                new_data_field,
+                            ),
+                            upgrade,
+                        )
+                        if new_data_field["indexed"]:
+                            cls._add_operator(
+                                cls._add_index(
+                                    model, {new_data_field["db_column"]}, new_data_field["unique"]
+                                ),
+                                upgrade,
+                                True,
+                            )
+                # remove fields
+                for old_data_field_name in set(old_data_fields_name).difference(
+                    set(new_data_fields_name)
+                ):
+                    # don't remove field if is renamed
+                    if (upgrade and old_data_field_name in cls._rename_old) or (
+                        not upgrade and old_data_field_name in cls._rename_new
+                    ):
+                        continue
+                    old_data_field = next(
+                        filter(lambda x: x.get("name") == old_data_field_name, old_data_fields)
+                    )
+                    db_column = old_data_field["db_column"]
+                    cls._add_operator(
+                        cls._remove_field(
+                            model,
+                            db_column,
+                        ),
+                        upgrade,
+                    )
+                    if old_data_field["indexed"]:
+                        cls._add_operator(
+                            cls._drop_index(
+                                model,
+                                {db_column},
+                            ),
+                            upgrade,
+                            True,
+                        )
+
+                old_fk_fields = old_model_describe.get("fk_fields")
+                new_fk_fields = new_model_describe.get("fk_fields")
+
+                old_fk_fields_name = list(map(lambda x: x.get("name"), old_fk_fields))
+                new_fk_fields_name = list(map(lambda x: x.get("name"), new_fk_fields))
+
+                # add fk
+                for new_fk_field_name in set(new_fk_fields_name).difference(
+                    set(old_fk_fields_name)
+                ):
+                    fk_field = next(
+                        filter(lambda x: x.get("name") == new_fk_field_name, new_fk_fields)
+                    )
+                    if fk_field.get("db_constraint"):
+                        cls._add_operator(
+                            cls._add_fk(
+                                model, fk_field, new_models.get(fk_field.get("python_type"))
+                            ),
+                            upgrade,
+                            fk_m2m_index=True,
+                        )
+                # drop fk
+                for old_fk_field_name in set(old_fk_fields_name).difference(
+                    set(new_fk_fields_name)
+                ):
+                    old_fk_field = next(
+                        filter(lambda x: x.get("name") == old_fk_field_name, old_fk_fields)
+                    )
+                    if old_fk_field.get("db_constraint"):
+                        cls._add_operator(
+                            cls._drop_fk(
+                                model, old_fk_field, old_models.get(old_fk_field.get("python_type"))
+                            ),
+                            upgrade,
+                            fk_m2m_index=True,
+                        )
+                # change fields
+                for field_name in set(new_data_fields_name).intersection(set(old_data_fields_name)):
+                    old_data_field = next(
+                        filter(lambda x: x.get("name") == field_name, old_data_fields)
+                    )
+                    new_data_field = next(
+                        filter(lambda x: x.get("name") == field_name, new_data_fields)
+                    )
+                    changes = diff(old_data_field, new_data_field)
+                    modified = False
+                    for change in changes:
+                        _, option, old_new = change
+                        if option == "indexed":
+                            # change index
+                            unique = new_data_field.get("unique")
+                            if old_new[0] is False and old_new[1] is True:
+                                cls._add_operator(
+                                    cls._add_index(model, (field_name,), unique), upgrade, True
+                                )
+                            else:
+                                cls._add_operator(
+                                    cls._drop_index(model, (field_name,), unique), upgrade, True
+                                )
+                        elif option == "db_field_types.":
+                            if new_data_field.get("field_type") == "DecimalField":
+                                # modify column
+                                cls._add_operator(
+                                    cls._modify_field(model, new_data_field),
+                                    upgrade,
+                                )
+                            else:
+                                continue
+                        elif option == "default":
+                            if not (
+                                is_default_function(old_new[0]) or is_default_function(old_new[1])
+                            ):
+                                # change column default
+                                cls._add_operator(
+                                    cls._alter_default(model, new_data_field), upgrade
+                                )
+                        elif option == "unique":
+                            # because indexed include it
+                            continue
+                        elif option == "nullable":
+                            # change nullable
+                            cls._add_operator(cls._alter_null(model, new_data_field), upgrade)
+                        else:
+                            if modified:
+                                continue
+                            # modify column
+                            cls._add_operator(
+                                cls._modify_field(model, new_data_field),
+                                upgrade,
+                            )
+                            modified = True
 
         for old_model in old_models:
             if old_model not in new_models.keys():
-                cls._add_operator(cls.remove_model(old_models.get(old_model)), upgrade)
+                cls._add_operator(cls.drop_model(old_models.get(old_model).get("table")), upgrade)
+
+    @classmethod
+    def rename_table(cls, model: Type[Model], old_table_name: str, new_table_name: str):
+        return cls.ddl.rename_table(model, old_table_name, new_table_name)
 
     @classmethod
     def add_model(cls, model: Type[Model]):
         return cls.ddl.create_table(model)
 
     @classmethod
-    def remove_model(cls, model: Type[Model]):
-        return cls.ddl.drop_table(model)
+    def drop_model(cls, table_name: str):
+        return cls.ddl.drop_table(table_name)
 
     @classmethod
-    def diff_model(cls, old_model: Type[Model], new_model: Type[Model], upgrade=True):
-        """
-        diff single model
-        :param old_model:
-        :param new_model:
-        :param upgrade:
-        :return:
-        """
-        old_indexes = old_model._meta.indexes
-        new_indexes = new_model._meta.indexes
+    def create_m2m(cls, model: Type[Model], field_describe: dict, reference_table_describe: dict):
+        return cls.ddl.create_m2m(model, field_describe, reference_table_describe)
 
-        old_unique_together = old_model._meta.unique_together
-        new_unique_together = new_model._meta.unique_together
-
-        old_fields_map = old_model._meta.fields_map
-        new_fields_map = new_model._meta.fields_map
-
-        old_keys = old_fields_map.keys()
-        new_keys = new_fields_map.keys()
-        for new_key in new_keys:
-            new_field = new_fields_map.get(new_key)
-            if cls._exclude_field(new_field, upgrade):
-                continue
-            if new_key not in old_keys:
-                cls._add_operator(
-                    cls._add_field(new_model, new_field),
-                    upgrade,
-                    isinstance(new_field, (ForeignKeyFieldInstance, ManyToManyFieldInstance)),
-                )
-            else:
-                old_field = old_fields_map.get(new_key)
-                if (old_field.index and not new_field.index) or (
-                    old_field.unique and not new_field.unique
-                ):
-                    cls._add_operator(
-                        cls._remove_index(
-                            old_model, (old_field.model_field_name,), old_field.unique
-                        ),
-                        upgrade,
-                        isinstance(old_field, (ForeignKeyFieldInstance, ManyToManyFieldInstance)),
-                    )
-                elif (new_field.index and not old_field.index) or (
-                    new_field.unique and not old_field.unique
-                ):
-                    cls._add_operator(
-                        cls._add_index(new_model, (new_field.model_field_name,), new_field.unique),
-                        upgrade,
-                        isinstance(new_field, (ForeignKeyFieldInstance, ManyToManyFieldInstance)),
-                    )
-
-        for old_key in old_keys:
-            field = old_fields_map.get(old_key)
-            if old_key not in new_keys and not cls._exclude_field(field, upgrade):
-                cls._add_operator(
-                    cls._remove_field(old_model, field),
-                    upgrade,
-                    isinstance(field, (ForeignKeyFieldInstance, ManyToManyFieldInstance)),
-                )
-
-        for new_index in new_indexes:
-            if new_index not in old_indexes:
-                cls._add_operator(cls._add_index(new_model, new_index,), upgrade)
-        for old_index in old_indexes:
-            if old_index not in new_indexes:
-                cls._add_operator(cls._remove_index(old_model, old_index), upgrade)
-
-        for new_unique in new_unique_together:
-            if new_unique not in old_unique_together:
-                cls._add_operator(cls._add_index(new_model, new_unique, unique=True), upgrade)
-
-        for old_unique in old_unique_together:
-            if old_unique not in new_unique_together:
-                cls._add_operator(cls._remove_index(old_model, old_unique, unique=True), upgrade)
+    @classmethod
+    def drop_m2m(cls, table_name: str):
+        return cls.ddl.drop_m2m(table_name)
 
     @classmethod
     def _resolve_fk_fields_name(cls, model: Type[Model], fields_name: Tuple[str]):
         ret = []
         for field_name in fields_name:
-            if field_name in model._meta.fk_fields:
+            field = model._meta.fields_map[field_name]
+            if field.source_field:
+                ret.append(field.source_field)
+            elif field_name in model._meta.fk_fields:
                 ret.append(field_name + "_id")
             else:
                 ret.append(field_name)
         return ret
 
     @classmethod
-    def _remove_index(cls, model: Type[Model], fields_name: Tuple[str], unique=False):
+    def _drop_index(cls, model: Type[Model], fields_name: Union[Tuple[str], Index], unique=False):
+        if isinstance(fields_name, Index):
+            return cls.ddl.drop_index_by_name(
+                model, fields_name.index_name(cls.ddl.schema_generator, model)
+            )
         fields_name = cls._resolve_fk_fields_name(model, fields_name)
         return cls.ddl.drop_index(model, fields_name, unique)
 
     @classmethod
-    def _add_index(cls, model: Type[Model], fields_name: Tuple[str], unique=False):
+    def _add_index(cls, model: Type[Model], fields_name: Union[Tuple[str], Index], unique=False):
+        if isinstance(fields_name, Index):
+            return fields_name.get_sql(cls.ddl.schema_generator, model, False)
         fields_name = cls._resolve_fk_fields_name(model, fields_name)
         return cls.ddl.add_index(model, fields_name, unique)
 
     @classmethod
-    def _exclude_field(cls, field: Field, upgrade=False):
-        """
-        exclude BackwardFKRelation and repeat m2m field
-        :param field:
-        :return:
-        """
-        if isinstance(field, ManyToManyFieldInstance):
-            through = field.through
-            if upgrade:
-                if through in cls._upgrade_m2m:
-                    return True
-                else:
-                    cls._upgrade_m2m.append(through)
-                    return False
-            else:
-                if through in cls._downgrade_m2m:
-                    return True
-                else:
-                    cls._downgrade_m2m.append(through)
-                    return False
-        return isinstance(field, (BackwardFKRelation, BackwardOneToOneRelation))
+    def _add_field(cls, model: Type[Model], field_describe: dict, is_pk: bool = False):
+        return cls.ddl.add_column(model, field_describe, is_pk)
 
     @classmethod
-    def _add_field(cls, model: Type[Model], field: Field):
-        if isinstance(field, ForeignKeyFieldInstance):
-            return cls.ddl.add_fk(model, field)
-        if isinstance(field, ManyToManyFieldInstance):
-            return cls.ddl.create_m2m_table(model, field)
-        return cls.ddl.add_column(model, field)
+    def _alter_default(cls, model: Type[Model], field_describe: dict):
+        return cls.ddl.alter_column_default(model, field_describe)
 
     @classmethod
-    def _remove_field(cls, model: Type[Model], field: Field):
-        if isinstance(field, ForeignKeyFieldInstance):
-            return cls.ddl.drop_fk(model, field)
-        if isinstance(field, ManyToManyFieldInstance):
-            return cls.ddl.drop_m2m(field)
-        return cls.ddl.drop_column(model, field.model_field_name)
+    def _alter_null(cls, model: Type[Model], field_describe: dict):
+        return cls.ddl.alter_column_null(model, field_describe)
 
     @classmethod
-    def _add_fk(cls, model: Type[Model], field: ForeignKeyFieldInstance):
+    def _set_comment(cls, model: Type[Model], field_describe: dict):
+        return cls.ddl.set_comment(model, field_describe)
+
+    @classmethod
+    def _modify_field(cls, model: Type[Model], field_describe: dict):
+        return cls.ddl.modify_column(model, field_describe)
+
+    @classmethod
+    def _drop_fk(cls, model: Type[Model], field_describe: dict, reference_table_describe: dict):
+        return cls.ddl.drop_fk(model, field_describe, reference_table_describe)
+
+    @classmethod
+    def _remove_field(cls, model: Type[Model], column_name: str):
+        return cls.ddl.drop_column(model, column_name)
+
+    @classmethod
+    def _rename_field(cls, model: Type[Model], old_field_name: str, new_field_name: str):
+        return cls.ddl.rename_column(model, old_field_name, new_field_name)
+
+    @classmethod
+    def _change_field(cls, model: Type[Model], old_field_describe: dict, new_field_describe: dict):
+        db_field_types = new_field_describe.get("db_field_types")
+        return cls.ddl.change_column(
+            model,
+            old_field_describe.get("db_column"),
+            new_field_describe.get("db_column"),
+            db_field_types.get(cls.dialect) or db_field_types.get(""),
+        )
+
+    @classmethod
+    def _add_fk(cls, model: Type[Model], field_describe: dict, reference_table_describe: dict):
         """
         add fk
         :param model:
-        :param field:
+        :param field_describe:
+        :param reference_table_describe:
         :return:
         """
-        return cls.ddl.add_fk(model, field)
-
-    @classmethod
-    def _remove_fk(cls, model: Type[Model], field: ForeignKeyFieldInstance):
-        """
-        drop fk
-        :param model:
-        :param field:
-        :return:
-        """
-        return cls.ddl.drop_fk(model, field)
+        return cls.ddl.add_fk(model, field_describe, reference_table_describe)
 
     @classmethod
     def _merge_operators(cls):

aerich/models.py

@@ -1,9 +1,15 @@
 from tortoise import Model, fields
 
+from aerich.coder import decoder, encoder
+
+MAX_VERSION_LENGTH = 255
+MAX_APP_LENGTH = 100
+
 
 class Aerich(Model):
-    version = fields.CharField(max_length=50)
-    app = fields.CharField(max_length=20)
+    version = fields.CharField(max_length=MAX_VERSION_LENGTH)
+    app = fields.CharField(max_length=MAX_APP_LENGTH)
+    content = fields.JSONField(encoder=encoder, decoder=decoder)
 
     class Meta:
         ordering = ["-id"]

aerich/utils.py

@@ -1,17 +1,44 @@
-import importlib
+import importlib.util
+import os
+import re
+import sys
+from pathlib import Path
+from typing import Dict
 
-from asyncclick import BadOptionUsage, Context
+from click import BadOptionUsage, ClickException, Context
 from tortoise import BaseDBAsyncClient, Tortoise
 
 
-def get_app_connection_name(config, app) -> str:
+def add_src_path(path: str) -> str:
+    """
+    add a folder to the paths, so we can import from there
+    :param path: path to add
+    :return: absolute path
+    """
+    if not os.path.isabs(path):
+        # use the absolute path, otherwise some other things (e.g. __file__) won't work properly
+        path = os.path.abspath(path)
+    if not os.path.isdir(path):
+        raise ClickException(f"Specified source folder does not exist: {path}")
+    if path not in sys.path:
+        sys.path.insert(0, path)
+    return path
+
+
+def get_app_connection_name(config, app_name: str) -> str:
     """
     get connection name
     :param config:
-    :param app:
+    :param app_name:
     :return:
     """
-    return config.get("apps").get(app).get("default_connection")
+    app = config.get("apps").get(app_name)
+    if app:
+        return app.get("default_connection", "default")
+    raise BadOptionUsage(
+        option_name="--app",
+        message=f'Can\'t get app named "{app_name}"',
+    )
 
 
 def get_app_connection(config, app) -> BaseDBAsyncClient:
@@ -34,12 +61,11 @@ def get_tortoise_config(ctx: Context, tortoise_orm: str) -> dict:
     splits = tortoise_orm.split(".")
     config_path = ".".join(splits[:-1])
     tortoise_config = splits[-1]
+
     try:
         config_module = importlib.import_module(config_path)
-    except (ModuleNotFoundError, AttributeError):
-        raise BadOptionUsage(
-            ctx=ctx, message=f'No config named "{config_path}"', option_name="--config"
-        )
+    except ModuleNotFoundError as e:
+        raise ClickException(f"Error while importing configuration module: {e}") from None
 
     config = getattr(config_module, tortoise_config, None)
     if not config:
@@ -49,3 +75,28 @@ def get_tortoise_config(ctx: Context, tortoise_orm: str) -> dict:
             ctx=ctx,
         )
     return config
+
+
+def get_models_describe(app: str) -> Dict:
+    """
+    get app models describe
+    :param app:
+    :return:
+    """
+    ret = {}
+    for model in Tortoise.apps.get(app).values():
+        describe = model.describe()
+        ret[describe.get("name")] = describe
+    return ret
+
+
+def is_default_function(string: str):
+    return re.match(r"^<function.+>$", str(string or ""))
+
+
+def import_py_file(file: Path):
+    module_name, file_ext = os.path.splitext(os.path.split(file)[-1])
+    spec = importlib.util.spec_from_file_location(module_name, file)
+    module = importlib.util.module_from_spec(spec)
+    spec.loader.exec_module(module)
+    return module

aerich/version.py

@@ -0,0 +1 @@
+__version__ = "0.7.2"

conftest.py

@@ -1,11 +1,65 @@
+import asyncio
 import os
 
 import pytest
-from tortoise.contrib.test import finalizer, initializer
+from tortoise import Tortoise, expand_db_url, generate_schema_for_client
+from tortoise.backends.asyncpg.schema_generator import AsyncpgSchemaGenerator
+from tortoise.backends.mysql.schema_generator import MySQLSchemaGenerator
+from tortoise.backends.sqlite.schema_generator import SqliteSchemaGenerator
+
+from aerich.ddl.mysql import MysqlDDL
+from aerich.ddl.postgres import PostgresDDL
+from aerich.ddl.sqlite import SqliteDDL
+from aerich.migrate import Migrate
+
+db_url = os.getenv("TEST_DB", "sqlite://:memory:")
+db_url_second = os.getenv("TEST_DB_SECOND", "sqlite://:memory:")
+tortoise_orm = {
+    "connections": {
+        "default": expand_db_url(db_url, True),
+        "second": expand_db_url(db_url_second, True),
+    },
+    "apps": {
+        "models": {"models": ["tests.models", "aerich.models"], "default_connection": "default"},
+        "models_second": {"models": ["tests.models_second"], "default_connection": "second"},
+    },
+}
 
 
-@pytest.fixture(scope="module", autouse=True)
-def initialize_tests(request):
-    db_url = os.getenv("TEST_DB", "sqlite://:memory:")
-    initializer(["tests.models"], db_url=db_url)
-    request.addfinalizer(finalizer)
+@pytest.fixture(scope="function", autouse=True)
+def reset_migrate():
+    Migrate.upgrade_operators = []
+    Migrate.downgrade_operators = []
+    Migrate._upgrade_fk_m2m_index_operators = []
+    Migrate._downgrade_fk_m2m_index_operators = []
+    Migrate._upgrade_m2m = []
+    Migrate._downgrade_m2m = []
+
+
+@pytest.fixture(scope="session")
+def event_loop():
+    policy = asyncio.get_event_loop_policy()
+    res = policy.new_event_loop()
+    asyncio.set_event_loop(res)
+    res._close = res.close
+    res.close = lambda: None
+
+    yield res
+
+    res._close()
+
+
+@pytest.fixture(scope="session", autouse=True)
+async def initialize_tests(event_loop, request):
+    await Tortoise.init(config=tortoise_orm, _create_db=True)
+    await generate_schema_for_client(Tortoise.get_connection("default"), safe=True)
+
+    client = Tortoise.get_connection("default")
+    if client.schema_generator is MySQLSchemaGenerator:
+        Migrate.ddl = MysqlDDL(client)
+    elif client.schema_generator is SqliteSchemaGenerator:
+        Migrate.ddl = SqliteDDL(client)
+    elif client.schema_generator is AsyncpgSchemaGenerator:
+        Migrate.ddl = PostgresDDL(client)
+    Migrate.dialect = Migrate.ddl.DIALECT
+    request.addfinalizer(lambda: event_loop.run_until_complete(Tortoise._drop_databases()))

pyproject.toml

@@ -1,32 +1,66 @@
 [tool.poetry]
 name = "aerich"
-version = "0.1.1"
+version = "0.7.2"
 description = "A database migrations tool for Tortoise ORM."
 authors = ["long2ice <long2ice@gmail.com>"]
+license = "Apache-2.0"
+readme = "README.md"
+homepage = "https://github.com/tortoise/aerich"
+repository = "https://github.com/tortoise/aerich.git"
+documentation = "https://github.com/tortoise/aerich"
+keywords = ["migrate", "Tortoise-ORM", "mysql"]
+packages = [
+    { include = "aerich" }
+]
+include = ["CHANGELOG.md", "LICENSE", "README.md"]
 
 [tool.poetry.dependencies]
-python = "^3.8"
-tortoise-orm = {git = "https://github.com/long2ice/tortoise-orm.git", branch = "develop"}
-asyncclick = "*"
+python = "^3.7"
+tortoise-orm = "*"
+click = "*"
+asyncpg = { version = "*", optional = true }
+asyncmy = { version = "^0.2.8rc1", optional = true, allow-prereleases = true }
 pydantic = "*"
+dictdiffer = "*"
+tomlkit = "*"
 
 [tool.poetry.dev-dependencies]
-taskipy = "*"
-asynctest = "*"
-flake8 = "*"
+ruff = "*"
 isort = "*"
-black = "^19.10b0"
+black = "*"
 pytest = "*"
-aiomysql = "*"
-asyncpg = "*"
 pytest-xdist = "*"
-mypy = "*"
+pytest-asyncio = "*"
+bandit = "*"
+pytest-mock = "*"
+cryptography = "*"
 
-[tool.taskipy.tasks]
-export = "poetry export -f requirements.txt --without-hashes > requirements.txt"
-export-dev = "poetry export -f requirements.txt --dev --without-hashes > requirements-dev.txt"
+[tool.poetry.extras]
+asyncmy = ["asyncmy"]
+asyncpg = ["asyncpg"]
+
+[tool.aerich]
+tortoise_orm = "conftest.tortoise_orm"
+location = "./migrations"
+src_folder = "./."
 
 [build-system]
 requires = ["poetry>=0.12"]
 build-backend = "poetry.masonry.api"
 
+[tool.poetry.scripts]
+aerich = "aerich.cli:main"
+
+[tool.black]
+line-length = 100
+target-version = ['py36', 'py37', 'py38', 'py39']
+
+[tool.pytest.ini_options]
+asyncio_mode = 'auto'
+
+[tool.mypy]
+pretty = true
+ignore_missing_imports = true
+
+[tool.ruff]
+ignore = ['E501']

pytest.ini

@@ -1,2 +0,0 @@
-[pytest]
-addopts = -p no:warnings --ignore=src

requirements-dev.txt

@@ -1,48 +0,0 @@
-aiomysql==0.0.20
-aiosqlite==0.13.0
-anyio==1.3.0
-apipkg==1.5
-appdirs==1.4.4
-async-generator==1.10
-asyncclick==7.0.9
-asyncpg==0.20.1
-asynctest==0.13.0
-atomicwrites==1.4.0; sys_platform == "win32"
-attrs==19.3.0
-black==19.10b0
-cffi==1.14.0
-ciso8601==2.1.3; sys_platform != "win32" and implementation_name == "cpython"
-click==7.1.2
-colorama==0.4.3; sys_platform == "win32"
-cryptography==2.9.2
-execnet==1.7.1
-flake8==3.8.1
-iso8601==0.1.12; sys_platform == "win32" or implementation_name != "cpython"
-isort==4.3.21
-mccabe==0.6.1
-more-itertools==8.3.0
-mypy==0.770
-mypy-extensions==0.4.3
-packaging==20.4
-pathspec==0.8.0
-pluggy==0.13.1
-py==1.8.1
-pycodestyle==2.6.0
-pycparser==2.20
-pydantic==1.5.1
-pyflakes==2.2.0
-pymysql==0.9.2
-pyparsing==2.4.7
-pypika==0.37.6
-pytest==5.4.2
-pytest-forked==1.1.3
-pytest-xdist==1.32.0
-regex==2020.5.14
-six==1.14.0
-sniffio==1.1.0
-taskipy==1.2.1
-toml==0.10.1
--e git+https://github.com/long2ice/tortoise-orm.git@1f67b7a0ca1384365d6ff89d9e245e733166d1a6#egg=tortoise-orm
-typed-ast==1.4.1
-typing-extensions==3.7.4.2
-wcwidth==0.1.9

requirements.txt

@@ -1,10 +0,0 @@
-aiosqlite==0.13.0
-anyio==1.3.0
-async-generator==1.10
-asyncclick==7.0.9
-ciso8601==2.1.3; sys_platform != "win32" and implementation_name == "cpython"
-iso8601==0.1.12; sys_platform == "win32" or implementation_name != "cpython"
-pydantic==1.5.1
-pypika==0.37.6
-sniffio==1.1.0
-typing-extensions==3.7.4.2

setup.cfg

@@ -1,47 +0,0 @@
-[flake8]
-max-line-length = 100
-exclude =
-ignore = E501,W503,DAR101,DAR201,DAR402
-
-[darglint]
-docstring_style=sphinx
-
-[isort]
-not_skip=__init__.py
-multi_line_output=3
-include_trailing_comma=True
-force_grid_wrap=0
-use_parentheses=True
-line_length=100
-
-[tool:pytest]
-addopts = -n auto --tb=native -q
-
-[mypy]
-pretty = True
-ignore_missing_imports = True
-check_untyped_defs = True
-disallow_subclassing_any = True
-disallow_untyped_calls = True
-disallow_untyped_defs = False
-disallow_incomplete_defs = False
-disallow_untyped_decorators = True
-no_implicit_optional = True
-warn_redundant_casts = True
-warn_unused_ignores = True
-warn_no_return = True
-warn_return_any = False
-warn_unused_configs = True
-warn_unreachable = True
-allow_redefinition = True
-strict_equality = True
-show_error_context = True
-
-[mypy-tests.*]
-check_untyped_defs = False
-disallow_untyped_defs = False
-disallow_incomplete_defs = False
-warn_unreachable = False
-
-[mypy-conftest]
-disallow_untyped_defs = False

setup.py

@@ -1,44 +0,0 @@
-import os
-import re
-from setuptools import find_packages, setup
-
-
-def version():
-    ver_str_line = open('aerich/__init__.py', 'rt').read()
-    mob = re.search(r"^__version__ = ['\"]([^'\"]*)['\"]", ver_str_line, re.M)
-    if not mob:
-        raise RuntimeError("Unable to find version string")
-    return mob.group(1)
-
-
-with open(os.path.join(os.path.dirname(__file__), 'README.rst')) as f:
-    long_description = f.read()
-
-
-def requirements():
-    return open('requirements.txt', 'rt').read().splitlines()
-
-
-setup(
-    name='aerich',
-    version=version(),
-    description='A database migrations tool for Tortoise-ORM.',
-    author='long2ice',
-    long_description_content_type='text/x-rst',
-    long_description=long_description,
-    author_email='long2ice@gmail.com',
-    url='https://github.com/long2ice/aerich',
-    license='MIT License',
-    packages=find_packages(include=['aerich*']),
-    include_package_data=True,
-    zip_safe=True,
-    entry_points={
-        'console_scripts': ['aerich = aerich.cli:main'],
-    },
-    platforms='any',
-    keywords=(
-        'migrate Tortoise-ORM mysql'
-    ),
-    dependency_links=['https://github.com/long2ice/tortoise-orm.git@develop#egg=tortoise-orm'],
-    install_requires=requirements(),
-)

tests/__init__.py

@@ -1,6 +0,0 @@
-TORTOISE_ORM = {
-    "connections": {"default": "mysql://root:123456@127.0.0.1:3306/test"},
-    "apps": {
-        "models": {"models": ["tests.models", "aerich.models"], "default_connection": "default"}
-    },
-}

tests/models.py

@@ -1,4 +1,5 @@
 import datetime
+import uuid
 from enum import IntEnum
 
 from tortoise import Model, fields
@@ -23,17 +24,29 @@ class Status(IntEnum):
 
 class User(Model):
     username = fields.CharField(max_length=20, unique=True)
-    password = fields.CharField(max_length=200)
+    password = fields.CharField(max_length=100)
     last_login = fields.DatetimeField(description="Last Login", default=datetime.datetime.now)
     is_active = fields.BooleanField(default=True, description="Is Active")
     is_superuser = fields.BooleanField(default=False, description="Is SuperUser")
-    avatar = fields.CharField(max_length=200, default="")
     intro = fields.TextField(default="")
+    longitude = fields.DecimalField(max_digits=10, decimal_places=8)
+
+
+class Email(Model):
+    email_id = fields.IntField(pk=True)
+    email = fields.CharField(max_length=200, index=True)
+    is_primary = fields.BooleanField(default=False)
+    address = fields.CharField(max_length=200)
+    users = fields.ManyToManyField("models.User")
+
+
+def default_name():
+    return uuid.uuid4()
 
 
 class Category(Model):
-    slug = fields.CharField(max_length=200)
-    name = fields.CharField(max_length=200)
+    slug = fields.CharField(max_length=100)
+    name = fields.CharField(max_length=200, null=True, default=default_name)
     user = fields.ForeignKeyField("models.User", description="User")
     created_at = fields.DatetimeField(auto_now_add=True)
 
@@ -41,17 +54,28 @@ class Category(Model):
 class Product(Model):
     categories = fields.ManyToManyField("models.Category")
     name = fields.CharField(max_length=50)
-    view_num = fields.IntField(description="View Num")
+    view_num = fields.IntField(description="View Num", default=0)
     sort = fields.IntField()
     is_reviewed = fields.BooleanField(description="Is Reviewed")
-    type = fields.IntEnumField(ProductType, description="Product Type")
-    image = fields.CharField(max_length=200)
+    type = fields.IntEnumField(
+        ProductType, description="Product Type", source_field="type_db_alias"
+    )
+    pic = fields.CharField(max_length=200)
     body = fields.TextField()
     created_at = fields.DatetimeField(auto_now_add=True)
 
+    class Meta:
+        unique_together = (("name", "type"),)
+        indexes = (("name", "type"),)
+
 
 class Config(Model):
     label = fields.CharField(max_length=200)
     key = fields.CharField(max_length=20)
     value = fields.JSONField()
-    status: Status = fields.IntEnumField(Status, default=Status.on)
+    status: Status = fields.IntEnumField(Status)
+    user = fields.ForeignKeyField("models.User", description="User")
+
+
+class NewModel(Model):
+    name = fields.CharField(max_length=50)

tests/models_second.py

@@ -0,0 +1,65 @@
+import datetime
+from enum import IntEnum
+
+from tortoise import Model, fields
+
+
+class ProductType(IntEnum):
+    article = 1
+    page = 2
+
+
+class PermissionAction(IntEnum):
+    create = 1
+    delete = 2
+    update = 3
+    read = 4
+
+
+class Status(IntEnum):
+    on = 1
+    off = 0
+
+
+class User(Model):
+    username = fields.CharField(max_length=20, unique=True)
+    password = fields.CharField(max_length=200)
+    last_login = fields.DatetimeField(description="Last Login", default=datetime.datetime.now)
+    is_active = fields.BooleanField(default=True, description="Is Active")
+    is_superuser = fields.BooleanField(default=False, description="Is SuperUser")
+    avatar = fields.CharField(max_length=200, default="")
+    intro = fields.TextField(default="")
+
+
+class Email(Model):
+    email = fields.CharField(max_length=200)
+    is_primary = fields.BooleanField(default=False)
+    user = fields.ForeignKeyField("models_second.User", db_constraint=False)
+
+
+class Category(Model):
+    slug = fields.CharField(max_length=200)
+    name = fields.CharField(max_length=200)
+    user = fields.ForeignKeyField("models_second.User", description="User")
+    created_at = fields.DatetimeField(auto_now_add=True)
+
+
+class Product(Model):
+    categories = fields.ManyToManyField("models_second.Category")
+    name = fields.CharField(max_length=50)
+    view_num = fields.IntField(description="View Num")
+    sort = fields.IntField()
+    is_reviewed = fields.BooleanField(description="Is Reviewed")
+    type = fields.IntEnumField(
+        ProductType, description="Product Type", source_field="type_db_alias"
+    )
+    image = fields.CharField(max_length=200)
+    body = fields.TextField()
+    created_at = fields.DatetimeField(auto_now_add=True)
+
+
+class Config(Model):
+    label = fields.CharField(max_length=200)
+    key = fields.CharField(max_length=20)
+    value = fields.JSONField()
+    status: Status = fields.IntEnumField(Status, default=Status.on)

tests/old_models.py

@@ -0,0 +1,69 @@
+import datetime
+from enum import IntEnum
+
+from tortoise import Model, fields
+
+
+class ProductType(IntEnum):
+    article = 1
+    page = 2
+
+
+class PermissionAction(IntEnum):
+    create = 1
+    delete = 2
+    update = 3
+    read = 4
+
+
+class Status(IntEnum):
+    on = 1
+    off = 0
+
+
+class User(Model):
+    username = fields.CharField(max_length=20)
+    password = fields.CharField(max_length=200)
+    last_login = fields.DatetimeField(description="Last Login", default=datetime.datetime.now)
+    is_active = fields.BooleanField(default=True, description="Is Active")
+    is_superuser = fields.BooleanField(default=False, description="Is SuperUser")
+    avatar = fields.CharField(max_length=200, default="")
+    intro = fields.TextField(default="")
+    longitude = fields.DecimalField(max_digits=12, decimal_places=9)
+
+
+class Email(Model):
+    email = fields.CharField(max_length=200)
+    is_primary = fields.BooleanField(default=False)
+    user = fields.ForeignKeyField("models.User", db_constraint=False)
+
+
+class Category(Model):
+    slug = fields.CharField(max_length=200)
+    name = fields.CharField(max_length=200)
+    user = fields.ForeignKeyField("models.User", description="User")
+    created_at = fields.DatetimeField(auto_now_add=True)
+
+
+class Product(Model):
+    categories = fields.ManyToManyField("models.Category")
+    name = fields.CharField(max_length=50)
+    view_num = fields.IntField(description="View Num")
+    sort = fields.IntField()
+    is_reviewed = fields.BooleanField(description="Is Reviewed")
+    type = fields.IntEnumField(
+        ProductType, description="Product Type", source_field="type_db_alias"
+    )
+    image = fields.CharField(max_length=200)
+    body = fields.TextField()
+    created_at = fields.DatetimeField(auto_now_add=True)
+
+
+class Config(Model):
+    label = fields.CharField(max_length=200)
+    key = fields.CharField(max_length=20)
+    value = fields.JSONField()
+    status: Status = fields.IntEnumField(Status, default=Status.on)
+
+    class Meta:
+        table = "configs"

tests/test_ddl.py

@@ -1,114 +1,206 @@
-from tortoise import Tortoise
-from tortoise.backends.asyncpg.schema_generator import AsyncpgSchemaGenerator
-from tortoise.backends.mysql.schema_generator import MySQLSchemaGenerator
-from tortoise.backends.sqlite.schema_generator import SqliteSchemaGenerator
-from tortoise.contrib import test
-
 from aerich.ddl.mysql import MysqlDDL
 from aerich.ddl.postgres import PostgresDDL
 from aerich.ddl.sqlite import SqliteDDL
-from tests.models import Category
+from aerich.migrate import Migrate
+from tests.models import Category, Product, User
 
 
-class TestDDL(test.TruncationTestCase):
-    maxDiff = None
-
-    def setUp(self) -> None:
-        client = Tortoise.get_connection("models")
-        if client.schema_generator is MySQLSchemaGenerator:
-            self.ddl = MysqlDDL(client)
-        elif client.schema_generator is SqliteSchemaGenerator:
-            self.ddl = SqliteDDL(client)
-        elif client.schema_generator is AsyncpgSchemaGenerator:
-            self.ddl = PostgresDDL(client)
-
-    def test_create_table(self):
-        ret = self.ddl.create_table(Category)
-        if isinstance(self.ddl, MysqlDDL):
-            self.assertEqual(
-                ret,
-                """CREATE TABLE IF NOT EXISTS `category` (
+def test_create_table():
+    ret = Migrate.ddl.create_table(Category)
+    if isinstance(Migrate.ddl, MysqlDDL):
+        assert (
+            ret
+            == """CREATE TABLE IF NOT EXISTS `category` (
     `id` INT NOT NULL PRIMARY KEY AUTO_INCREMENT,
-    `slug` VARCHAR(200) NOT NULL,
-    `name` VARCHAR(200) NOT NULL,
+    `slug` VARCHAR(100) NOT NULL,
+    `name` VARCHAR(200),
     `created_at` DATETIME(6) NOT NULL  DEFAULT CURRENT_TIMESTAMP(6),
     `user_id` INT NOT NULL COMMENT 'User',
     CONSTRAINT `fk_category_user_e2e3874c` FOREIGN KEY (`user_id`) REFERENCES `user` (`id`) ON DELETE CASCADE
-) CHARACTER SET utf8mb4;""",
-            )
-        elif isinstance(self.ddl, SqliteDDL):
-            self.assertEqual(
-                ret,
-                """CREATE TABLE IF NOT EXISTS "category" (
-    "id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
-    "slug" VARCHAR(200) NOT NULL,
-    "name" VARCHAR(200) NOT NULL,
-    "created_at" TIMESTAMP NOT NULL  DEFAULT CURRENT_TIMESTAMP,
-    "user_id" INT NOT NULL REFERENCES "user" ("id") ON DELETE CASCADE /* User */
-);""",
-            )
-        elif isinstance(self.ddl, PostgresDDL):
-            self.assertEqual(
-                ret,
-                """CREATE TABLE IF NOT EXISTS "category" (
-    "id" SERIAL NOT NULL PRIMARY KEY,
-    "slug" VARCHAR(200) NOT NULL,
-    "name" VARCHAR(200) NOT NULL,
-    "created_at" TIMESTAMP NOT NULL  DEFAULT CURRENT_TIMESTAMP,
-    "user_id" INT NOT NULL REFERENCES "user" ("id") ON DELETE CASCADE
-);
-COMMENT ON COLUMN "category"."user_id" IS 'User';""",
-            )
-
-    def test_drop_table(self):
-        ret = self.ddl.drop_table(Category)
-        self.assertEqual(ret, "DROP TABLE IF EXISTS category")
-
-    def test_add_column(self):
-        ret = self.ddl.add_column(Category, Category._meta.fields_map.get("name"))
-        if isinstance(self.ddl, MysqlDDL):
-            self.assertEqual(ret, "ALTER TABLE category ADD `name` VARCHAR(200) NOT NULL")
-        elif isinstance(self.ddl, PostgresDDL):
-            self.assertEqual(ret, 'ALTER TABLE category ADD "name" VARCHAR(200) NOT NULL')
-        elif isinstance(self.ddl, SqliteDDL):
-            self.assertEqual(ret, 'ALTER TABLE category ADD "name" VARCHAR(200) NOT NULL')
-
-    def test_drop_column(self):
-        ret = self.ddl.drop_column(Category, "name")
-        self.assertEqual(ret, "ALTER TABLE category DROP COLUMN name")
-        self.assertEqual(ret, "ALTER TABLE category DROP COLUMN name")
-
-    def test_add_index(self):
-        index = self.ddl.add_index(Category, ["name"])
-        index_u = self.ddl.add_index(Category, ["name"], True)
-        if isinstance(self.ddl, MysqlDDL):
-            self.assertEqual(
-                index, "ALTER TABLE category ADD  INDEX idx_category_name_8b0cb9 (`name`)"
-            )
-            self.assertEqual(
-                index_u, "ALTER TABLE category ADD UNIQUE INDEX uid_category_name_8b0cb9 (`name`)"
-            )
-        elif isinstance(self.ddl, SqliteDDL):
-            self.assertEqual(
-                index_u, 'ALTER TABLE category ADD UNIQUE INDEX uid_category_name_8b0cb9 ("name")'
-            )
-            self.assertEqual(
-                index_u, 'ALTER TABLE category ADD UNIQUE INDEX uid_category_name_8b0cb9 ("name")'
-            )
-
-    def test_drop_index(self):
-        ret = self.ddl.drop_index(Category, ["name"])
-        self.assertEqual(ret, "ALTER TABLE category DROP INDEX idx_category_name_8b0cb9")
-        ret = self.ddl.drop_index(Category, ["name"], True)
-        self.assertEqual(ret, "ALTER TABLE category DROP INDEX uid_category_name_8b0cb9")
-
-    def test_add_fk(self):
-        ret = self.ddl.add_fk(Category, Category._meta.fields_map.get("user"))
-        self.assertEqual(
-            ret,
-            "ALTER TABLE category ADD CONSTRAINT `fk_category_user_e2e3874c` FOREIGN KEY (`user_id`) REFERENCES `user` (`id`) ON DELETE CASCADE",
+) CHARACTER SET utf8mb4"""
         )
 
-    def test_drop_fk(self):
-        ret = self.ddl.drop_fk(Category, Category._meta.fields_map.get("user"))
-        self.assertEqual(ret, "ALTER TABLE category DROP FOREIGN KEY fk_category_user_e2e3874c")
+    elif isinstance(Migrate.ddl, SqliteDDL):
+        assert (
+            ret
+            == """CREATE TABLE IF NOT EXISTS "category" (
+    "id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
+    "slug" VARCHAR(100) NOT NULL,
+    "name" VARCHAR(200),
+    "created_at" TIMESTAMP NOT NULL  DEFAULT CURRENT_TIMESTAMP,
+    "user_id" INT NOT NULL REFERENCES "user" ("id") ON DELETE CASCADE /* User */
+)"""
+        )
+
+    elif isinstance(Migrate.ddl, PostgresDDL):
+        assert (
+            ret
+            == """CREATE TABLE IF NOT EXISTS "category" (
+    "id" SERIAL NOT NULL PRIMARY KEY,
+    "slug" VARCHAR(100) NOT NULL,
+    "name" VARCHAR(200),
+    "created_at" TIMESTAMPTZ NOT NULL  DEFAULT CURRENT_TIMESTAMP,
+    "user_id" INT NOT NULL REFERENCES "user" ("id") ON DELETE CASCADE
+);
+COMMENT ON COLUMN "category"."user_id" IS 'User'"""
+        )
+
+
+def test_drop_table():
+    ret = Migrate.ddl.drop_table(Category._meta.db_table)
+    if isinstance(Migrate.ddl, MysqlDDL):
+        assert ret == "DROP TABLE IF EXISTS `category`"
+    else:
+        assert ret == 'DROP TABLE IF EXISTS "category"'
+
+
+def test_add_column():
+    ret = Migrate.ddl.add_column(Category, Category._meta.fields_map.get("name").describe(False))
+    if isinstance(Migrate.ddl, MysqlDDL):
+        assert ret == "ALTER TABLE `category` ADD `name` VARCHAR(200)"
+    else:
+        assert ret == 'ALTER TABLE "category" ADD "name" VARCHAR(200)'
+
+
+def test_modify_column():
+    if isinstance(Migrate.ddl, SqliteDDL):
+        return
+
+    ret0 = Migrate.ddl.modify_column(
+        Category, Category._meta.fields_map.get("name").describe(False)
+    )
+    ret1 = Migrate.ddl.modify_column(User, User._meta.fields_map.get("is_active").describe(False))
+    if isinstance(Migrate.ddl, MysqlDDL):
+        assert ret0 == "ALTER TABLE `category` MODIFY COLUMN `name` VARCHAR(200)"
+        assert (
+            ret1
+            == "ALTER TABLE `user` MODIFY COLUMN `is_active` BOOL NOT NULL  COMMENT 'Is Active' DEFAULT 1"
+        )
+    elif isinstance(Migrate.ddl, PostgresDDL):
+        assert (
+            ret0
+            == 'ALTER TABLE "category" ALTER COLUMN "name" TYPE VARCHAR(200) USING "name"::VARCHAR(200)'
+        )
+
+        assert (
+            ret1 == 'ALTER TABLE "user" ALTER COLUMN "is_active" TYPE BOOL USING "is_active"::BOOL'
+        )
+
+
+def test_alter_column_default():
+    if isinstance(Migrate.ddl, SqliteDDL):
+        return
+    ret = Migrate.ddl.alter_column_default(User, User._meta.fields_map.get("intro").describe(False))
+    if isinstance(Migrate.ddl, PostgresDDL):
+        assert ret == 'ALTER TABLE "user" ALTER COLUMN "intro" SET DEFAULT \'\''
+    elif isinstance(Migrate.ddl, MysqlDDL):
+        assert ret == "ALTER TABLE `user` ALTER COLUMN `intro` SET DEFAULT ''"
+
+    ret = Migrate.ddl.alter_column_default(
+        Category, Category._meta.fields_map.get("created_at").describe(False)
+    )
+    if isinstance(Migrate.ddl, PostgresDDL):
+        assert (
+            ret == 'ALTER TABLE "category" ALTER COLUMN "created_at" SET DEFAULT CURRENT_TIMESTAMP'
+        )
+    elif isinstance(Migrate.ddl, MysqlDDL):
+        assert (
+            ret
+            == "ALTER TABLE `category` ALTER COLUMN `created_at` SET DEFAULT CURRENT_TIMESTAMP(6)"
+        )
+
+    ret = Migrate.ddl.alter_column_default(
+        Product, Product._meta.fields_map.get("view_num").describe(False)
+    )
+    if isinstance(Migrate.ddl, PostgresDDL):
+        assert ret == 'ALTER TABLE "product" ALTER COLUMN "view_num" SET DEFAULT 0'
+    elif isinstance(Migrate.ddl, MysqlDDL):
+        assert ret == "ALTER TABLE `product` ALTER COLUMN `view_num` SET DEFAULT 0"
+
+
+def test_alter_column_null():
+    if isinstance(Migrate.ddl, (SqliteDDL, MysqlDDL)):
+        return
+    ret = Migrate.ddl.alter_column_null(
+        Category, Category._meta.fields_map.get("name").describe(False)
+    )
+    if isinstance(Migrate.ddl, PostgresDDL):
+        assert ret == 'ALTER TABLE "category" ALTER COLUMN "name" DROP NOT NULL'
+
+
+def test_set_comment():
+    if isinstance(Migrate.ddl, (SqliteDDL, MysqlDDL)):
+        return
+    ret = Migrate.ddl.set_comment(Category, Category._meta.fields_map.get("name").describe(False))
+    assert ret == 'COMMENT ON COLUMN "category"."name" IS NULL'
+
+    ret = Migrate.ddl.set_comment(Category, Category._meta.fields_map.get("user").describe(False))
+    assert ret == 'COMMENT ON COLUMN "category"."user_id" IS \'User\''
+
+
+def test_drop_column():
+    ret = Migrate.ddl.drop_column(Category, "name")
+    if isinstance(Migrate.ddl, MysqlDDL):
+        assert ret == "ALTER TABLE `category` DROP COLUMN `name`"
+    elif isinstance(Migrate.ddl, PostgresDDL):
+        assert ret == 'ALTER TABLE "category" DROP COLUMN "name"'
+
+
+def test_add_index():
+    index = Migrate.ddl.add_index(Category, ["name"])
+    index_u = Migrate.ddl.add_index(Category, ["name"], True)
+    if isinstance(Migrate.ddl, MysqlDDL):
+        assert index == "ALTER TABLE `category` ADD INDEX `idx_category_name_8b0cb9` (`name`)"
+        assert (
+            index_u == "ALTER TABLE `category` ADD UNIQUE INDEX `uid_category_name_8b0cb9` (`name`)"
+        )
+    elif isinstance(Migrate.ddl, PostgresDDL):
+        assert index == 'CREATE INDEX "idx_category_name_8b0cb9" ON "category" ("name")'
+        assert index_u == 'CREATE UNIQUE INDEX "uid_category_name_8b0cb9" ON "category" ("name")'
+    else:
+        assert index == 'ALTER TABLE "category" ADD INDEX "idx_category_name_8b0cb9" ("name")'
+        assert (
+            index_u == 'ALTER TABLE "category" ADD UNIQUE INDEX "uid_category_name_8b0cb9" ("name")'
+        )
+
+
+def test_drop_index():
+    ret = Migrate.ddl.drop_index(Category, ["name"])
+    ret_u = Migrate.ddl.drop_index(Category, ["name"], True)
+    if isinstance(Migrate.ddl, MysqlDDL):
+        assert ret == "ALTER TABLE `category` DROP INDEX `idx_category_name_8b0cb9`"
+        assert ret_u == "ALTER TABLE `category` DROP INDEX `uid_category_name_8b0cb9`"
+    elif isinstance(Migrate.ddl, PostgresDDL):
+        assert ret == 'DROP INDEX "idx_category_name_8b0cb9"'
+        assert ret_u == 'DROP INDEX "uid_category_name_8b0cb9"'
+    else:
+        assert ret == 'ALTER TABLE "category" DROP INDEX "idx_category_name_8b0cb9"'
+        assert ret_u == 'ALTER TABLE "category" DROP INDEX "uid_category_name_8b0cb9"'
+
+
+def test_add_fk():
+    ret = Migrate.ddl.add_fk(
+        Category, Category._meta.fields_map.get("user").describe(False), User.describe(False)
+    )
+    if isinstance(Migrate.ddl, MysqlDDL):
+        assert (
+            ret
+            == "ALTER TABLE `category` ADD CONSTRAINT `fk_category_user_e2e3874c` FOREIGN KEY (`user_id`) REFERENCES `user` (`id`) ON DELETE CASCADE"
+        )
+    else:
+        assert (
+            ret
+            == 'ALTER TABLE "category" ADD CONSTRAINT "fk_category_user_e2e3874c" FOREIGN KEY ("user_id") REFERENCES "user" ("id") ON DELETE CASCADE'
+        )
+
+
+def test_drop_fk():
+    ret = Migrate.ddl.drop_fk(
+        Category, Category._meta.fields_map.get("user").describe(False), User.describe(False)
+    )
+    if isinstance(Migrate.ddl, MysqlDDL):
+        assert ret == "ALTER TABLE `category` DROP FOREIGN KEY `fk_category_user_e2e3874c`"
+    elif isinstance(Migrate.ddl, PostgresDDL):
+        assert ret == 'ALTER TABLE "category" DROP CONSTRAINT "fk_category_user_e2e3874c"'
+    else:
+        assert ret == 'ALTER TABLE "category" DROP FOREIGN KEY "fk_category_user_e2e3874c"'

tests/test_migrate.py

@@ -0,0 +1,968 @@
+import pytest
+from pytest_mock import MockerFixture
+
+from aerich.ddl.mysql import MysqlDDL
+from aerich.ddl.postgres import PostgresDDL
+from aerich.ddl.sqlite import SqliteDDL
+from aerich.exceptions import NotSupportError
+from aerich.migrate import Migrate
+from aerich.utils import get_models_describe
+
+old_models_describe = {
+    "models.Category": {
+        "name": "models.Category",
+        "app": "models",
+        "table": "category",
+        "abstract": False,
+        "description": None,
+        "docstring": None,
+        "unique_together": [],
+        "indexes": [],
+        "pk_field": {
+            "name": "id",
+            "field_type": "IntField",
+            "db_column": "id",
+            "python_type": "int",
+            "generated": True,
+            "nullable": False,
+            "unique": True,
+            "indexed": True,
+            "default": None,
+            "description": None,
+            "docstring": None,
+            "constraints": {"ge": 1, "le": 2147483647},
+            "db_field_types": {"": "INT"},
+        },
+        "data_fields": [
+            {
+                "name": "slug",
+                "field_type": "CharField",
+                "db_column": "slug",
+                "python_type": "str",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"max_length": 200},
+                "db_field_types": {"": "VARCHAR(200)"},
+            },
+            {
+                "name": "name",
+                "field_type": "CharField",
+                "db_column": "name",
+                "python_type": "str",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"max_length": 200},
+                "db_field_types": {"": "VARCHAR(200)"},
+            },
+            {
+                "name": "created_at",
+                "field_type": "DatetimeField",
+                "db_column": "created_at",
+                "python_type": "datetime.datetime",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"readOnly": True},
+                "db_field_types": {
+                    "": "TIMESTAMP",
+                    "mysql": "DATETIME(6)",
+                    "postgres": "TIMESTAMPTZ",
+                },
+                "auto_now_add": True,
+                "auto_now": False,
+            },
+            {
+                "name": "user_id",
+                "field_type": "IntField",
+                "db_column": "user_id",
+                "python_type": "int",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": "User",
+                "docstring": None,
+                "constraints": {"ge": 1, "le": 2147483647},
+                "db_field_types": {"": "INT"},
+            },
+        ],
+        "fk_fields": [
+            {
+                "name": "user",
+                "field_type": "ForeignKeyFieldInstance",
+                "python_type": "models.User",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": "User",
+                "docstring": None,
+                "constraints": {},
+                "raw_field": "user_id",
+                "on_delete": "CASCADE",
+            }
+        ],
+        "backward_fk_fields": [],
+        "o2o_fields": [],
+        "backward_o2o_fields": [],
+        "m2m_fields": [
+            {
+                "name": "products",
+                "field_type": "ManyToManyFieldInstance",
+                "python_type": "models.Product",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {},
+                "model_name": "models.Product",
+                "related_name": "categories",
+                "forward_key": "product_id",
+                "backward_key": "category_id",
+                "through": "product_category",
+                "on_delete": "CASCADE",
+                "_generated": True,
+            }
+        ],
+    },
+    "models.Config": {
+        "name": "models.Config",
+        "app": "models",
+        "table": "configs",
+        "abstract": False,
+        "description": None,
+        "docstring": None,
+        "unique_together": [],
+        "indexes": [],
+        "pk_field": {
+            "name": "id",
+            "field_type": "IntField",
+            "db_column": "id",
+            "python_type": "int",
+            "generated": True,
+            "nullable": False,
+            "unique": True,
+            "indexed": True,
+            "default": None,
+            "description": None,
+            "docstring": None,
+            "constraints": {"ge": 1, "le": 2147483647},
+            "db_field_types": {"": "INT"},
+        },
+        "data_fields": [
+            {
+                "name": "label",
+                "field_type": "CharField",
+                "db_column": "label",
+                "python_type": "str",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"max_length": 200},
+                "db_field_types": {"": "VARCHAR(200)"},
+            },
+            {
+                "name": "key",
+                "field_type": "CharField",
+                "db_column": "key",
+                "python_type": "str",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"max_length": 20},
+                "db_field_types": {"": "VARCHAR(20)"},
+            },
+            {
+                "name": "value",
+                "field_type": "JSONField",
+                "db_column": "value",
+                "python_type": "Union[dict, list]",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {},
+                "db_field_types": {"": "TEXT", "postgres": "JSONB"},
+            },
+            {
+                "name": "status",
+                "field_type": "IntEnumFieldInstance",
+                "db_column": "status",
+                "python_type": "int",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": 1,
+                "description": "on: 1\noff: 0",
+                "docstring": None,
+                "constraints": {"ge": -32768, "le": 32767},
+                "db_field_types": {"": "SMALLINT"},
+            },
+        ],
+        "fk_fields": [],
+        "backward_fk_fields": [],
+        "o2o_fields": [],
+        "backward_o2o_fields": [],
+        "m2m_fields": [],
+    },
+    "models.Email": {
+        "name": "models.Email",
+        "app": "models",
+        "table": "email",
+        "abstract": False,
+        "description": None,
+        "docstring": None,
+        "unique_together": [],
+        "indexes": [],
+        "pk_field": {
+            "name": "id",
+            "field_type": "IntField",
+            "db_column": "id",
+            "python_type": "int",
+            "generated": True,
+            "nullable": False,
+            "unique": True,
+            "indexed": True,
+            "default": None,
+            "description": None,
+            "docstring": None,
+            "constraints": {"ge": 1, "le": 2147483647},
+            "db_field_types": {"": "INT"},
+        },
+        "data_fields": [
+            {
+                "name": "email",
+                "field_type": "CharField",
+                "db_column": "email",
+                "python_type": "str",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"max_length": 200},
+                "db_field_types": {"": "VARCHAR(200)"},
+            },
+            {
+                "name": "is_primary",
+                "field_type": "BooleanField",
+                "db_column": "is_primary",
+                "python_type": "bool",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": False,
+                "description": None,
+                "docstring": None,
+                "constraints": {},
+                "db_field_types": {"": "BOOL", "sqlite": "INT"},
+            },
+            {
+                "name": "user_id",
+                "field_type": "IntField",
+                "db_column": "user_id",
+                "python_type": "int",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"ge": 1, "le": 2147483647},
+                "db_field_types": {"": "INT"},
+            },
+        ],
+        "fk_fields": [
+            {
+                "name": "user",
+                "field_type": "ForeignKeyFieldInstance",
+                "python_type": "models.User",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {},
+                "raw_field": "user_id",
+                "on_delete": "CASCADE",
+            }
+        ],
+        "backward_fk_fields": [],
+        "o2o_fields": [],
+        "backward_o2o_fields": [],
+        "m2m_fields": [],
+    },
+    "models.Product": {
+        "name": "models.Product",
+        "app": "models",
+        "table": "product",
+        "abstract": False,
+        "description": None,
+        "docstring": None,
+        "unique_together": [],
+        "indexes": [],
+        "pk_field": {
+            "name": "id",
+            "field_type": "IntField",
+            "db_column": "id",
+            "python_type": "int",
+            "generated": True,
+            "nullable": False,
+            "unique": True,
+            "indexed": True,
+            "default": None,
+            "description": None,
+            "docstring": None,
+            "constraints": {"ge": 1, "le": 2147483647},
+            "db_field_types": {"": "INT"},
+        },
+        "data_fields": [
+            {
+                "name": "name",
+                "field_type": "CharField",
+                "db_column": "name",
+                "python_type": "str",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"max_length": 50},
+                "db_field_types": {"": "VARCHAR(50)"},
+            },
+            {
+                "name": "view_num",
+                "field_type": "IntField",
+                "db_column": "view_num",
+                "python_type": "int",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": "View Num",
+                "docstring": None,
+                "constraints": {"ge": -2147483648, "le": 2147483647},
+                "db_field_types": {"": "INT"},
+            },
+            {
+                "name": "sort",
+                "field_type": "IntField",
+                "db_column": "sort",
+                "python_type": "int",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"ge": -2147483648, "le": 2147483647},
+                "db_field_types": {"": "INT"},
+            },
+            {
+                "name": "is_reviewed",
+                "field_type": "BooleanField",
+                "db_column": "is_reviewed",
+                "python_type": "bool",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": "Is Reviewed",
+                "docstring": None,
+                "constraints": {},
+                "db_field_types": {"": "BOOL", "sqlite": "INT"},
+            },
+            {
+                "name": "type",
+                "field_type": "IntEnumFieldInstance",
+                "db_column": "type_db_alias",
+                "python_type": "int",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": "Product Type",
+                "docstring": None,
+                "constraints": {"ge": -32768, "le": 32767},
+                "db_field_types": {"": "SMALLINT"},
+            },
+            {
+                "name": "image",
+                "field_type": "CharField",
+                "db_column": "image",
+                "python_type": "str",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"max_length": 200},
+                "db_field_types": {"": "VARCHAR(200)"},
+            },
+            {
+                "name": "body",
+                "field_type": "TextField",
+                "db_column": "body",
+                "python_type": "str",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {},
+                "db_field_types": {"": "TEXT", "mysql": "LONGTEXT"},
+            },
+            {
+                "name": "created_at",
+                "field_type": "DatetimeField",
+                "db_column": "created_at",
+                "python_type": "datetime.datetime",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"readOnly": True},
+                "db_field_types": {
+                    "": "TIMESTAMP",
+                    "mysql": "DATETIME(6)",
+                    "postgres": "TIMESTAMPTZ",
+                },
+                "auto_now_add": True,
+                "auto_now": False,
+            },
+        ],
+        "fk_fields": [],
+        "backward_fk_fields": [],
+        "o2o_fields": [],
+        "backward_o2o_fields": [],
+        "m2m_fields": [
+            {
+                "name": "categories",
+                "field_type": "ManyToManyFieldInstance",
+                "python_type": "models.Category",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {},
+                "model_name": "models.Category",
+                "related_name": "products",
+                "forward_key": "category_id",
+                "backward_key": "product_id",
+                "through": "product_category",
+                "on_delete": "CASCADE",
+                "_generated": False,
+            }
+        ],
+    },
+    "models.User": {
+        "name": "models.User",
+        "app": "models",
+        "table": "user",
+        "abstract": False,
+        "description": None,
+        "docstring": None,
+        "unique_together": [],
+        "indexes": [],
+        "pk_field": {
+            "name": "id",
+            "field_type": "IntField",
+            "db_column": "id",
+            "python_type": "int",
+            "generated": True,
+            "nullable": False,
+            "unique": True,
+            "indexed": True,
+            "default": None,
+            "description": None,
+            "docstring": None,
+            "constraints": {"ge": 1, "le": 2147483647},
+            "db_field_types": {"": "INT"},
+        },
+        "data_fields": [
+            {
+                "name": "username",
+                "field_type": "CharField",
+                "db_column": "username",
+                "python_type": "str",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"max_length": 20},
+                "db_field_types": {"": "VARCHAR(20)"},
+            },
+            {
+                "name": "password",
+                "field_type": "CharField",
+                "db_column": "password",
+                "python_type": "str",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"max_length": 200},
+                "db_field_types": {"": "VARCHAR(200)"},
+            },
+            {
+                "name": "last_login",
+                "field_type": "DatetimeField",
+                "db_column": "last_login",
+                "python_type": "datetime.datetime",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": "<function None.now>",
+                "description": "Last Login",
+                "docstring": None,
+                "constraints": {},
+                "db_field_types": {
+                    "": "TIMESTAMP",
+                    "mysql": "DATETIME(6)",
+                    "postgres": "TIMESTAMPTZ",
+                },
+                "auto_now_add": False,
+                "auto_now": False,
+            },
+            {
+                "name": "is_active",
+                "field_type": "BooleanField",
+                "db_column": "is_active",
+                "python_type": "bool",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": True,
+                "description": "Is Active",
+                "docstring": None,
+                "constraints": {},
+                "db_field_types": {"": "BOOL", "sqlite": "INT"},
+            },
+            {
+                "name": "is_superuser",
+                "field_type": "BooleanField",
+                "db_column": "is_superuser",
+                "python_type": "bool",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": False,
+                "description": "Is SuperUser",
+                "docstring": None,
+                "constraints": {},
+                "db_field_types": {"": "BOOL", "sqlite": "INT"},
+            },
+            {
+                "name": "avatar",
+                "field_type": "CharField",
+                "db_column": "avatar",
+                "python_type": "str",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": "",
+                "description": None,
+                "docstring": None,
+                "constraints": {"max_length": 200},
+                "db_field_types": {"": "VARCHAR(200)"},
+            },
+            {
+                "name": "intro",
+                "field_type": "TextField",
+                "db_column": "intro",
+                "python_type": "str",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": "",
+                "description": None,
+                "docstring": None,
+                "constraints": {},
+                "db_field_types": {"": "TEXT", "mysql": "LONGTEXT"},
+            },
+            {
+                "name": "longitude",
+                "unique": False,
+                "default": None,
+                "indexed": False,
+                "nullable": False,
+                "db_column": "longitude",
+                "docstring": None,
+                "generated": False,
+                "field_type": "DecimalField",
+                "constraints": {},
+                "description": None,
+                "python_type": "decimal.Decimal",
+                "db_field_types": {"": "DECIMAL(12,9)", "sqlite": "VARCHAR(40)"},
+            },
+        ],
+        "fk_fields": [],
+        "backward_fk_fields": [
+            {
+                "name": "categorys",
+                "field_type": "BackwardFKRelation",
+                "python_type": "models.Category",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": "User",
+                "docstring": None,
+                "constraints": {},
+            },
+            {
+                "name": "emails",
+                "field_type": "BackwardFKRelation",
+                "python_type": "models.Email",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {},
+            },
+        ],
+        "o2o_fields": [],
+        "backward_o2o_fields": [],
+        "m2m_fields": [],
+    },
+    "models.Aerich": {
+        "name": "models.Aerich",
+        "app": "models",
+        "table": "aerich",
+        "abstract": False,
+        "description": None,
+        "docstring": None,
+        "unique_together": [],
+        "indexes": [],
+        "pk_field": {
+            "name": "id",
+            "field_type": "IntField",
+            "db_column": "id",
+            "python_type": "int",
+            "generated": True,
+            "nullable": False,
+            "unique": True,
+            "indexed": True,
+            "default": None,
+            "description": None,
+            "docstring": None,
+            "constraints": {"ge": 1, "le": 2147483647},
+            "db_field_types": {"": "INT"},
+        },
+        "data_fields": [
+            {
+                "name": "version",
+                "field_type": "CharField",
+                "db_column": "version",
+                "python_type": "str",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"max_length": 255},
+                "db_field_types": {"": "VARCHAR(255)"},
+            },
+            {
+                "name": "app",
+                "field_type": "CharField",
+                "db_column": "app",
+                "python_type": "str",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"max_length": 20},
+                "db_field_types": {"": "VARCHAR(20)"},
+            },
+            {
+                "name": "content",
+                "field_type": "JSONField",
+                "db_column": "content",
+                "python_type": "Union[dict, list]",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {},
+                "db_field_types": {"": "TEXT", "postgres": "JSONB"},
+            },
+        ],
+        "fk_fields": [],
+        "backward_fk_fields": [],
+        "o2o_fields": [],
+        "backward_o2o_fields": [],
+        "m2m_fields": [],
+    },
+}
+
+
+def test_migrate(mocker: MockerFixture):
+    """
+    models.py diff with old_models.py
+    - change email pk: id -> email_id
+    - add field: Email.address
+    - add fk: Config.user
+    - drop fk: Email.user
+    - drop field: User.avatar
+    - add index: Email.email
+    - add many to many: Email.users
+    - remove unique: User.username
+    - change column: length User.password
+    - add unique_together: (name,type) of Product
+    - alter default: Config.status
+    - rename column: Product.image -> Product.pic
+    """
+    mocker.patch("click.prompt", side_effect=(True,))
+
+    models_describe = get_models_describe("models")
+    Migrate.app = "models"
+    if isinstance(Migrate.ddl, SqliteDDL):
+        with pytest.raises(NotSupportError):
+            Migrate.diff_models(old_models_describe, models_describe)
+            Migrate.diff_models(models_describe, old_models_describe, False)
+    else:
+        Migrate.diff_models(old_models_describe, models_describe)
+        Migrate.diff_models(models_describe, old_models_describe, False)
+    Migrate._merge_operators()
+    if isinstance(Migrate.ddl, MysqlDDL):
+        expected_upgrade_operators = {
+            "ALTER TABLE `category` MODIFY COLUMN `name` VARCHAR(200)",
+            "ALTER TABLE `category` MODIFY COLUMN `slug` VARCHAR(100) NOT NULL",
+            "ALTER TABLE `config` ADD `user_id` INT NOT NULL  COMMENT 'User'",
+            "ALTER TABLE `config` ADD CONSTRAINT `fk_config_user_17daa970` FOREIGN KEY (`user_id`) REFERENCES `user` (`id`) ON DELETE CASCADE",
+            "ALTER TABLE `config` ALTER COLUMN `status` DROP DEFAULT",
+            "ALTER TABLE `config` MODIFY COLUMN `value` JSON NOT NULL",
+            "ALTER TABLE `email` ADD `address` VARCHAR(200) NOT NULL",
+            "ALTER TABLE `email` DROP COLUMN `user_id`",
+            "ALTER TABLE `configs` RENAME TO `config`",
+            "ALTER TABLE `product` RENAME COLUMN `image` TO `pic`",
+            "ALTER TABLE `email` RENAME COLUMN `id` TO `email_id`",
+            "ALTER TABLE `product` ADD INDEX `idx_product_name_869427` (`name`, `type_db_alias`)",
+            "ALTER TABLE `email` ADD INDEX `idx_email_email_4a1a33` (`email`)",
+            "ALTER TABLE `product` ADD UNIQUE INDEX `uid_product_name_869427` (`name`, `type_db_alias`)",
+            "ALTER TABLE `product` ALTER COLUMN `view_num` SET DEFAULT 0",
+            "ALTER TABLE `product` MODIFY COLUMN `created_at` DATETIME(6) NOT NULL  DEFAULT CURRENT_TIMESTAMP(6)",
+            "ALTER TABLE `product` MODIFY COLUMN `is_reviewed` BOOL NOT NULL  COMMENT 'Is Reviewed'",
+            "ALTER TABLE `user` DROP COLUMN `avatar`",
+            "ALTER TABLE `user` MODIFY COLUMN `password` VARCHAR(100) NOT NULL",
+            "ALTER TABLE `user` MODIFY COLUMN `intro` LONGTEXT NOT NULL",
+            "ALTER TABLE `user` MODIFY COLUMN `last_login` DATETIME(6) NOT NULL  COMMENT 'Last Login'",
+            "ALTER TABLE `user` MODIFY COLUMN `is_active` BOOL NOT NULL  COMMENT 'Is Active' DEFAULT 1",
+            "ALTER TABLE `user` MODIFY COLUMN `is_superuser` BOOL NOT NULL  COMMENT 'Is SuperUser' DEFAULT 0",
+            "ALTER TABLE `user` MODIFY COLUMN `longitude` DECIMAL(10,8) NOT NULL",
+            "ALTER TABLE `user` ADD UNIQUE INDEX `uid_user_usernam_9987ab` (`username`)",
+            "CREATE TABLE `email_user` (\n    `email_id` INT NOT NULL REFERENCES `email` (`email_id`) ON DELETE CASCADE,\n    `user_id` INT NOT NULL REFERENCES `user` (`id`) ON DELETE CASCADE\n) CHARACTER SET utf8mb4",
+            "CREATE TABLE IF NOT EXISTS `newmodel` (\n    `id` INT NOT NULL PRIMARY KEY AUTO_INCREMENT,\n    `name` VARCHAR(50) NOT NULL\n) CHARACTER SET utf8mb4",
+            "ALTER TABLE `category` MODIFY COLUMN `created_at` DATETIME(6) NOT NULL  DEFAULT CURRENT_TIMESTAMP(6)",
+            "ALTER TABLE `product` MODIFY COLUMN `body` LONGTEXT NOT NULL",
+            "ALTER TABLE `email` MODIFY COLUMN `is_primary` BOOL NOT NULL  DEFAULT 0",
+        }
+        expected_downgrade_operators = {
+            "ALTER TABLE `category` MODIFY COLUMN `name` VARCHAR(200) NOT NULL",
+            "ALTER TABLE `category` MODIFY COLUMN `slug` VARCHAR(200) NOT NULL",
+            "ALTER TABLE `config` DROP COLUMN `user_id`",
+            "ALTER TABLE `config` DROP FOREIGN KEY `fk_config_user_17daa970`",
+            "ALTER TABLE `config` ALTER COLUMN `status` SET DEFAULT 1",
+            "ALTER TABLE `email` ADD `user_id` INT NOT NULL",
+            "ALTER TABLE `email` DROP COLUMN `address`",
+            "ALTER TABLE `config` RENAME TO `configs`",
+            "ALTER TABLE `product` RENAME COLUMN `pic` TO `image`",
+            "ALTER TABLE `email` RENAME COLUMN `email_id` TO `id`",
+            "ALTER TABLE `product` DROP INDEX `idx_product_name_869427`",
+            "ALTER TABLE `email` DROP INDEX `idx_email_email_4a1a33`",
+            "ALTER TABLE `product` DROP INDEX `uid_product_name_869427`",
+            "ALTER TABLE `product` ALTER COLUMN `view_num` DROP DEFAULT",
+            "ALTER TABLE `user` ADD `avatar` VARCHAR(200) NOT NULL  DEFAULT ''",
+            "ALTER TABLE `user` DROP INDEX `idx_user_usernam_9987ab`",
+            "ALTER TABLE `user` MODIFY COLUMN `password` VARCHAR(200) NOT NULL",
+            "DROP TABLE IF EXISTS `email_user`",
+            "DROP TABLE IF EXISTS `newmodel`",
+            "ALTER TABLE `user` MODIFY COLUMN `intro` LONGTEXT NOT NULL",
+            "ALTER TABLE `config` MODIFY COLUMN `value` TEXT NOT NULL",
+            "ALTER TABLE `category` MODIFY COLUMN `created_at` DATETIME(6) NOT NULL  DEFAULT CURRENT_TIMESTAMP(6)",
+            "ALTER TABLE `product` MODIFY COLUMN `created_at` DATETIME(6) NOT NULL  DEFAULT CURRENT_TIMESTAMP(6)",
+            "ALTER TABLE `product` MODIFY COLUMN `is_reviewed` BOOL NOT NULL  COMMENT 'Is Reviewed'",
+            "ALTER TABLE `user` MODIFY COLUMN `last_login` DATETIME(6) NOT NULL  COMMENT 'Last Login'",
+            "ALTER TABLE `user` MODIFY COLUMN `is_active` BOOL NOT NULL  COMMENT 'Is Active' DEFAULT 1",
+            "ALTER TABLE `user` MODIFY COLUMN `is_superuser` BOOL NOT NULL  COMMENT 'Is SuperUser' DEFAULT 0",
+            "ALTER TABLE `user` MODIFY COLUMN `longitude` DECIMAL(12,9) NOT NULL",
+            "ALTER TABLE `product` MODIFY COLUMN `body` LONGTEXT NOT NULL",
+            "ALTER TABLE `email` MODIFY COLUMN `is_primary` BOOL NOT NULL  DEFAULT 0",
+        }
+        assert not set(Migrate.upgrade_operators).symmetric_difference(expected_upgrade_operators)
+
+        assert not set(Migrate.downgrade_operators).symmetric_difference(
+            expected_downgrade_operators
+        )
+
+    elif isinstance(Migrate.ddl, PostgresDDL):
+        expected_upgrade_operators = {
+            'ALTER TABLE "category" ALTER COLUMN "name" DROP NOT NULL',
+            'ALTER TABLE "category" ALTER COLUMN "slug" TYPE VARCHAR(100) USING "slug"::VARCHAR(100)',
+            'ALTER TABLE "category" ALTER COLUMN "created_at" TYPE TIMESTAMPTZ USING "created_at"::TIMESTAMPTZ',
+            'ALTER TABLE "config" ADD "user_id" INT NOT NULL',
+            'ALTER TABLE "config" ADD CONSTRAINT "fk_config_user_17daa970" FOREIGN KEY ("user_id") REFERENCES "user" ("id") ON DELETE CASCADE',
+            'ALTER TABLE "config" ALTER COLUMN "status" DROP DEFAULT',
+            'ALTER TABLE "config" ALTER COLUMN "value" TYPE JSONB USING "value"::JSONB',
+            'ALTER TABLE "configs" RENAME TO "config"',
+            'ALTER TABLE "email" ADD "address" VARCHAR(200) NOT NULL',
+            'ALTER TABLE "email" DROP COLUMN "user_id"',
+            'ALTER TABLE "email" RENAME COLUMN "id" TO "email_id"',
+            'ALTER TABLE "email" ALTER COLUMN "is_primary" TYPE BOOL USING "is_primary"::BOOL',
+            'ALTER TABLE "product" ALTER COLUMN "view_num" SET DEFAULT 0',
+            'ALTER TABLE "product" RENAME COLUMN "image" TO "pic"',
+            'ALTER TABLE "product" ALTER COLUMN "is_reviewed" TYPE BOOL USING "is_reviewed"::BOOL',
+            'ALTER TABLE "product" ALTER COLUMN "body" TYPE TEXT USING "body"::TEXT',
+            'ALTER TABLE "product" ALTER COLUMN "created_at" TYPE TIMESTAMPTZ USING "created_at"::TIMESTAMPTZ',
+            'ALTER TABLE "user" ALTER COLUMN "password" TYPE VARCHAR(100) USING "password"::VARCHAR(100)',
+            'ALTER TABLE "user" DROP COLUMN "avatar"',
+            'ALTER TABLE "user" ALTER COLUMN "is_superuser" TYPE BOOL USING "is_superuser"::BOOL',
+            'ALTER TABLE "user" ALTER COLUMN "last_login" TYPE TIMESTAMPTZ USING "last_login"::TIMESTAMPTZ',
+            'ALTER TABLE "user" ALTER COLUMN "intro" TYPE TEXT USING "intro"::TEXT',
+            'ALTER TABLE "user" ALTER COLUMN "is_active" TYPE BOOL USING "is_active"::BOOL',
+            'ALTER TABLE "user" ALTER COLUMN "longitude" TYPE DECIMAL(10,8) USING "longitude"::DECIMAL(10,8)',
+            'CREATE INDEX "idx_product_name_869427" ON "product" ("name", "type_db_alias")',
+            'CREATE INDEX "idx_email_email_4a1a33" ON "email" ("email")',
+            'CREATE TABLE "email_user" (\n    "email_id" INT NOT NULL REFERENCES "email" ("email_id") ON DELETE CASCADE,\n    "user_id" INT NOT NULL REFERENCES "user" ("id") ON DELETE CASCADE\n)',
+            'CREATE TABLE IF NOT EXISTS "newmodel" (\n    "id" SERIAL NOT NULL PRIMARY KEY,\n    "name" VARCHAR(50) NOT NULL\n);\nCOMMENT ON COLUMN "config"."user_id" IS \'User\'',
+            'CREATE UNIQUE INDEX "uid_product_name_869427" ON "product" ("name", "type_db_alias")',
+            'CREATE UNIQUE INDEX "uid_user_usernam_9987ab" ON "user" ("username")',
+        }
+        expected_downgrade_operators = {
+            'ALTER TABLE "category" ALTER COLUMN "name" SET NOT NULL',
+            'ALTER TABLE "category" ALTER COLUMN "slug" TYPE VARCHAR(200) USING "slug"::VARCHAR(200)',
+            'ALTER TABLE "category" ALTER COLUMN "created_at" TYPE TIMESTAMPTZ USING "created_at"::TIMESTAMPTZ',
+            'ALTER TABLE "config" ALTER COLUMN "status" SET DEFAULT 1',
+            'ALTER TABLE "config" DROP COLUMN "user_id"',
+            'ALTER TABLE "config" DROP CONSTRAINT "fk_config_user_17daa970"',
+            'ALTER TABLE "config" RENAME TO "configs"',
+            'ALTER TABLE "config" ALTER COLUMN "value" TYPE JSONB USING "value"::JSONB',
+            'ALTER TABLE "email" ADD "user_id" INT NOT NULL',
+            'ALTER TABLE "email" DROP COLUMN "address"',
+            'ALTER TABLE "email" RENAME COLUMN "email_id" TO "id"',
+            'ALTER TABLE "email" ALTER COLUMN "is_primary" TYPE BOOL USING "is_primary"::BOOL',
+            'ALTER TABLE "product" ALTER COLUMN "view_num" DROP DEFAULT',
+            'ALTER TABLE "product" RENAME COLUMN "pic" TO "image"',
+            'ALTER TABLE "user" ADD "avatar" VARCHAR(200) NOT NULL  DEFAULT \'\'',
+            'ALTER TABLE "user" ALTER COLUMN "password" TYPE VARCHAR(200) USING "password"::VARCHAR(200)',
+            'ALTER TABLE "user" ALTER COLUMN "last_login" TYPE TIMESTAMPTZ USING "last_login"::TIMESTAMPTZ',
+            'ALTER TABLE "user" ALTER COLUMN "is_superuser" TYPE BOOL USING "is_superuser"::BOOL',
+            'ALTER TABLE "user" ALTER COLUMN "is_active" TYPE BOOL USING "is_active"::BOOL',
+            'ALTER TABLE "user" ALTER COLUMN "intro" TYPE TEXT USING "intro"::TEXT',
+            'ALTER TABLE "user" ALTER COLUMN "longitude" TYPE DECIMAL(12,9) USING "longitude"::DECIMAL(12,9)',
+            'ALTER TABLE "product" ALTER COLUMN "created_at" TYPE TIMESTAMPTZ USING "created_at"::TIMESTAMPTZ',
+            'ALTER TABLE "product" ALTER COLUMN "is_reviewed" TYPE BOOL USING "is_reviewed"::BOOL',
+            'ALTER TABLE "product" ALTER COLUMN "body" TYPE TEXT USING "body"::TEXT',
+            'DROP INDEX "idx_product_name_869427"',
+            'DROP INDEX "idx_email_email_4a1a33"',
+            'DROP INDEX "idx_user_usernam_9987ab"',
+            'DROP INDEX "uid_product_name_869427"',
+            'DROP TABLE IF EXISTS "email_user"',
+            'DROP TABLE IF EXISTS "newmodel"',
+        }
+        assert not set(Migrate.upgrade_operators).symmetric_difference(expected_upgrade_operators)
+        assert not set(Migrate.downgrade_operators).symmetric_difference(
+            expected_downgrade_operators
+        )
+
+    elif isinstance(Migrate.ddl, SqliteDDL):
+        assert Migrate.upgrade_operators == []
+        assert Migrate.downgrade_operators == []
+
+
+def test_sort_all_version_files(mocker):
+    mocker.patch(
+        "os.listdir",
+        return_value=[
+            "1_datetime_update.py",
+            "11_datetime_update.py",
+            "10_datetime_update.py",
+            "2_datetime_update.py",
+        ],
+    )
+
+    Migrate.migrate_location = "."
+
+    assert Migrate.get_all_version_files() == [
+        "1_datetime_update.py",
+        "2_datetime_update.py",
+        "10_datetime_update.py",
+        "11_datetime_update.py",
+    ]

tests/test_utils.py

@@ -0,0 +1,6 @@
+from aerich.utils import import_py_file
+
+
+def test_import_py_file():
+    m = import_py_file("aerich/utils.py")
+    assert getattr(m, "import_py_file")