fix: aerich init-db process is suspended (#435)

* fix style issue

* fixing m2m test error

.github/FUNDING.yml

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

.github/workflows/ci.yml

@@ -0,0 +1,109 @@
+name: ci
+on:
+  push:
+    branches-ignore:
+      - main
+  pull_request:
+    branches-ignore:
+      - main
+jobs:
+  ci:
+    runs-on: ubuntu-latest
+    services:
+      postgres:
+        image: postgres:latest
+        ports:
+          - 5432:5432
+        env:
+          POSTGRES_PASSWORD: 123456
+          POSTGRES_USER: postgres
+        options: --health-cmd=pg_isready --health-interval 10s --health-timeout 5s --health-retries 5
+    strategy:
+      matrix:
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
+        tortoise-orm:
+          - tortoise021
+          - tortoise022
+          - tortoise023
+          - tortoise024
+          # TODO: add dev back when drop python3.8 support
+          # - tortoisedev
+    steps:
+      - name: Start MySQL
+        run: sudo systemctl start mysql.service
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+      - uses: actions/cache@v4
+        with:
+          path: ~/.cache/pip
+          key: ${{ runner.os }}-pip-${{ hashFiles('**/poetry.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-pip-
+      - name: Install and configure Poetry
+        run: |
+          pip install -U pip
+          if [[ "${{ matrix.python-version }}" == "3.8" ]]; then
+            # poetry2.0+ does not support installed by python3.8, but can manage project using py38
+            python3.12 -m pip install "poetry>=2.0"
+          else
+            pip install "poetry>=2.0"
+          fi
+          poetry env use python${{ matrix.python-version }}
+      - name: Install dependencies and check style
+        run: poetry run make check
+      - name: Install TortoiseORM v0.21
+        if: matrix.tortoise-orm == 'tortoise021'
+        run: poetry run pip install --upgrade "tortoise-orm>=0.21,<0.22"
+      - name: Install TortoiseORM v0.22
+        if: matrix.tortoise-orm == 'tortoise022'
+        run: poetry run pip install --upgrade "tortoise-orm>=0.22,<0.23"
+      - name: Install TortoiseORM v0.23
+        if: matrix.tortoise-orm == 'tortoise023'
+        run: poetry run pip install --upgrade "tortoise-orm>=0.23,<0.24"
+      - name: Install TortoiseORM v0.24
+        if: matrix.tortoise-orm == 'tortoise024'
+        run: |
+          if [[ "${{ matrix.python-version }}" == "3.8" ]]; then
+            echo "Skip test for tortoise v0.24 as it does not support Python3.8"
+          else
+            poetry run pip install --upgrade "tortoise-orm>=0.24,<0.25"
+          fi
+      - name: Install TortoiseORM develop branch
+        if: matrix.tortoise-orm == 'tortoisedev'
+        run: |
+          if [[ "${{ matrix.python-version }}" == "3.8" ]]; then
+            echo "Skip test for tortoise develop branch as it does not support Python3.8"
+          else
+            poetry run pip uninstall -y tortoise-orm
+            poetry run pip install --upgrade "git+https://github.com/tortoise/tortoise-orm"
+          fi
+      - name: CI
+        env:
+          MYSQL_PASS: root
+          MYSQL_HOST: 127.0.0.1
+          MYSQL_PORT: 3306
+          POSTGRES_PASS: 123456
+          POSTGRES_HOST: 127.0.0.1
+          POSTGRES_PORT: 5432
+        run: poetry run make _testall
+      - name: Verify aiomysql support
+        # Only check the latest version of tortoise
+        if: matrix.tortoise-orm == 'tortoise024'
+        run: |
+            poetry run pip uninstall -y asyncmy
+            poetry run make test_mysql
+            poetry run pip install asyncmy
+        env:
+          MYSQL_PASS: root
+          MYSQL_HOST: 127.0.0.1
+          MYSQL_PORT: 3306
+      - name: Verify psycopg support
+        # Only check the latest version of tortoise
+        if: matrix.tortoise-orm == 'tortoise024'
+        run: poetry run make test_psycopg
+        env:
+          POSTGRES_PASS: 123456
+          POSTGRES_HOST: 127.0.0.1
+          POSTGRES_PORT: 5432

.github/workflows/pypi.yml

@@ -7,11 +7,14 @@ jobs:
   publish:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-python@v2
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: '3.x'
-      - uses: dschep/install-poetry-action@v1.3
+      - name: Install and configure Poetry
+        run: |
+          pip install -U pip poetry
+          poetry config virtualenvs.create false
       - name: Build dists
         run: make build
       - name: Pypi Publish

.github/workflows/test.yml

@@ -1,31 +0,0 @@
-name: test
-on: [push, pull_request]
-jobs:
-  testall:
-    runs-on: ubuntu-latest
-    services:
-      postgres:
-        image: postgres:latest
-        ports:
-          - 5432:5432
-        env:
-          POSTGRES_PASSWORD: 123456
-          POSTGRES_USER: postgres
-        options: --health-cmd=pg_isready --health-interval 10s --health-timeout 5s --health-retries 5
-    steps:
-      - name: Start MySQL
-        run: sudo systemctl start mysql.service
-      - uses: actions/checkout@v2
-      - uses: actions/setup-python@v2
-        with:
-          python-version: '3.x'
-      - uses: dschep/install-poetry-action@v1.3
-      - name: CI
-        env:
-          MYSQL_PASS: root
-          MYSQL_HOST: 127.0.0.1
-          MYSQL_PORT: 3306
-          POSTGRES_PASS: 123456
-          POSTGRES_HOST: 127.0.0.1
-          POSTGRES_PORT: 5432
-        run: make ci

.gitignore

@@ -144,3 +144,6 @@ cython_debug/
 migrations
 aerich.ini
 src
+.vscode
+.DS_Store
+.python-version

CHANGELOG.md

@@ -0,0 +1,338 @@
+# ChangeLog
+
+## 0.8
+
+### [0.8.3]**(Unreleased)**
+
+#### Fixed
+- fix: `aerich init-db` process is suspended. ([#435])
+
+[#435]: https://github.com/tortoise/aerich/pull/435
+
+### [0.8.2](../../releases/tag/v0.8.2) - 2025-02-28
+
+#### Added
+- Support changes `max_length` or int type for primary key field. ([#428])
+- feat: support psycopg. ([#425])
+- Support run `poetry add aerich` in project that inited by poetry v2. ([#424])
+- feat: support command `python -m aerich`. ([#417])
+- feat: add --fake to upgrade/downgrade. ([#398])
+- Support ignore table by settings `managed=False` in `Meta` class. ([#397])
+
+#### Fixed
+- fix: aerich migrate raises tortoise.exceptions.FieldError when `index.INDEX_TYPE` is not empty. ([#415])
+- No migration occurs as expected when adding `unique=True` to indexed field. ([#404])
+- fix: inspectdb raise KeyError 'int2' for smallint. ([#401])
+- fix: inspectdb not match data type 'DOUBLE' and 'CHAR' for MySQL. ([#187])
+
+### Changed
+- Refactored version management to use `importlib.metadata.version(__package__)` instead of hardcoded version string ([#412])
+
+[#397]: https://github.com/tortoise/aerich/pull/397
+[#398]: https://github.com/tortoise/aerich/pull/398
+[#401]: https://github.com/tortoise/aerich/pull/401
+[#404]: https://github.com/tortoise/aerich/pull/404
+[#412]: https://github.com/tortoise/aerich/pull/412
+[#415]: https://github.com/tortoise/aerich/pull/415
+[#417]: https://github.com/tortoise/aerich/pull/417
+[#424]: https://github.com/tortoise/aerich/pull/424
+[#425]: https://github.com/tortoise/aerich/pull/425
+
+### [0.8.1](../../releases/tag/v0.8.1) - 2024-12-27
+
+#### Fixed
+- fix: add o2o field does not create constraint when migrating. ([#396])
+- Migration with duplicate renaming of columns in some cases. ([#395])
+- fix: intermediate table for m2m relation not created. ([#394])
+- Migrate add m2m field with custom through generate duplicated table. ([#393])
+- Migrate drop the wrong m2m field when model have multi m2m fields. ([#376])
+- KeyError raised when removing or renaming an existing model. ([#386])
+- fix: error when there is `__init__.py` in the migration folder. ([#272])
+- Setting null=false on m2m field causes migration to fail. ([#334])
+- Fix NonExistentKey when running `aerich init` without `[tool]` section in config file. ([#284])
+- Fix configuration file reading error when containing Chinese characters. ([#286])
+- sqlite: failed to create/drop index. ([#302])
+- PostgreSQL: Cannot drop constraint after deleting or rename FK on a model. ([#378])
+- Fix create/drop indexes in every migration. ([#377])
+- Sort m2m fields before comparing them with diff. ([#271])
+
+#### Changed
+- Allow run `aerich init-db` with empty migration directories instead of abort with warnings. ([#286])
+- Add version constraint(>=0.21) for tortoise-orm. ([#388])
+- Move `tomlkit` to optional and support `pip install aerich[toml]`. ([#392])
+
+[#396]: https://github.com/tortoise/aerich/pull/396
+[#395]: https://github.com/tortoise/aerich/pull/395
+[#394]: https://github.com/tortoise/aerich/pull/394
+[#393]: https://github.com/tortoise/aerich/pull/393
+[#392]: https://github.com/tortoise/aerich/pull/392
+[#388]: https://github.com/tortoise/aerich/pull/388
+[#386]: https://github.com/tortoise/aerich/pull/386
+[#378]: https://github.com/tortoise/aerich/pull/378
+[#377]: https://github.com/tortoise/aerich/pull/377
+[#376]: https://github.com/tortoise/aerich/pull/376
+[#334]: https://github.com/tortoise/aerich/pull/334
+[#302]: https://github.com/tortoise/aerich/pull/302
+[#286]: https://github.com/tortoise/aerich/pull/286
+[#284]: https://github.com/tortoise/aerich/pull/284
+[#272]: https://github.com/tortoise/aerich/pull/272
+[#271]: https://github.com/tortoise/aerich/pull/271
+
+### [0.8.0](../../releases/tag/v0.8.0) - 2024-12-04
+
+- Fix the issue of parameter concatenation when generating ORM with inspectdb (#331)
+- Fix KeyError when deleting a field with unqiue=True. (#364)
+- Correct the click import. (#360)
+- Improve CLI help text and output. (#355)
+- Fix mysql drop unique index raises OperationalError. (#346)
+
+  **Upgrade note:**
+    1. Use column name as unique key name for mysql
+    2. Drop support for Python3.7
+
+## 0.7
+
+### [0.7.2](../../releases/tag/v0.7.2) - 2023-07-20
+
+- 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

@@ -1,71 +0,0 @@
-=========
-ChangeLog
-=========
-0.2
-===
-
-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.

Makefile

@@ -1,56 +1,58 @@
 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
-
-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"
+POSTGRES_PASS ?= 123456
 
 up:
 	@poetry update
 
 deps:
-	@poetry install -E dbdrivers --no-root
+	@poetry install --all-extras --all-groups
 
-style: deps
-	isort -src $(checkfiles)
-	black $(black_opts) $(checkfiles)
+_style:
+	@ruff check --fix $(checkfiles)
+	@ruff format $(checkfiles)
+style: deps _style
 
-check: deps
-	black --check $(black_opts) $(checkfiles) || (echo "Please run 'make style' to auto-fix style issues" && false)
-	flake8 $(checkfiles)
-	bandit -x tests -r $(checkfiles)
+_check:
+	@ruff format --check $(checkfiles) || (echo "Please run 'make style' to auto-fix style issues" && false)
+	@ruff check $(checkfiles)
+	@mypy $(checkfiles)
+	@bandit -r aerich
+check: deps _check
+
+_lint: _build
+	@ruff format $(checkfiles)
+	ruff check --fix $(checkfiles)
+	mypy $(checkfiles)
+	bandit -c pyproject.toml -r $(checkfiles)
+	twine check dist/*
+lint: deps _lint
 
 test: deps
-	$(py_warn) TEST_DB=sqlite://:memory: py.test
+	$(py_warn) TEST_DB=sqlite://:memory: pytest
 
 test_sqlite:
-	$(py_warn) TEST_DB=sqlite://:memory: py.test
+	$(py_warn) TEST_DB=sqlite://:memory: pytest
 
 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
+test_psycopg:
+	$(py_warn) TEST_DB="psycopg://postgres:$(POSTGRES_PASS)@$(POSTGRES_HOST):$(POSTGRES_PORT)/test_\{\}" pytest -vv -s
 
-build: deps
+_testall: test_sqlite test_postgres test_mysql
+testall: deps _testall
+
+_build:
 	@poetry build
+build: deps _build
 
-publish: deps
-	@poetry publish --build
-
-ci: check testall
+ci: build _check _testall

README.md

@@ -1,57 +1,52 @@
 # 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/long2ice/aerich)](https://github.com/long2ice/aerich)
-[![image](https://github.com/long2ice/aerich/workflows/pypi/badge.svg)](https://github.com/long2ice/aerich/actions?query=workflow:pypi)
-[![image](https://github.com/long2ice/aerich/workflows/test/badge.svg)](https://github.com/long2ice/aerich/actions?query=workflow:test)
+[![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)
 
-<a href="https://tracking.gitads.io/?repo=aerich"><img src="https://images.gitads.io/aerich" alt="GitAds"/></a>
+English | [Русский](./README_RU.md)
 
 ## 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.
+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
+pip install "aerich[toml]"
 ```
 
 ## Quick Start
 
 ```shell
-$ aerich -h
+> 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]
+  -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 previous version.
+  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 latest version.
+  upgrade    Upgrade to specified version.
 ```
 
 ## Usage
 
-You need add `aerich.models` to your `Tortoise-ORM` config first,
-example:
+You need to add `aerich.models` to your `Tortoise-ORM` config first. Example:
 
 ```python
 TORTOISE_ORM = {
@@ -68,115 +63,247 @@ TORTOISE_ORM = {
 ### Initialization
 
 ```shell
-$ aerich init -h
+> 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]
+  -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.
 ```
 
-Init config file and location:
+Initialize the config file and migrations location:
 
 ```shell
-$ aerich init -t tests.backends.mysql.TORTOISE_ORM
+> aerich init -t tests.backends.mysql.TORTOISE_ORM
 
 Success create migrate location ./migrations
-Success generate config file aerich.ini
+Success write config to pyproject.toml
 ```
 
 ### Init db
 
 ```shell
-$ aerich init-db
+> aerich init-db
 
 Success create app migrate location ./migrations/models
 Success generate schema for app "models"
 ```
 
-::: {.note}
-::: {.title}
-Note
-:::
-
-If your Tortoise-ORM app is not default `models`, you must specify
-`--app` like `aerich --app other_models init-db`.
-:::
+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
+> aerich migrate --name drop_column
 
-Success migrate 1_202029051520102929_drop_column.json
+Success migrate 1_202029051520102929_drop_column.py
 ```
 
 Format of migrate filename is
-`{version_num}_{datetime}_{name|update}.json`
+`{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.
+
+If you need to manually write migration, you could generate empty file:
+
+```shell
+> aerich migrate --name add_index --empty
+
+Success migrate 1_202326122220101229_add_index.py
+```
 
 ### Upgrade to latest version
 
 ```shell
-$ aerich upgrade
+> aerich upgrade
 
-Success upgrade 1_202029051520102929_drop_column.json
+Success upgrade 1_202029051520102929_drop_column.py
 ```
 
 Now your db is migrated to latest.
 
-### Downgrade to previous version
+### Downgrade to specified version
 
 ```shell
-$ aerich downgrade
+> aerich downgrade -h
 
-Success downgrade 1_202029051520102929_drop_column.json
+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.
 ```
 
-Now your db rollback to previous version.
+```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
+> aerich history
 
-1_202029051520102929_drop_column.json
+1_202029051520102929_drop_column.py
 ```
 
 ### Show heads to be migrated
 
 ```shell
-$ aerich heads
+> aerich heads
 
-1_202029051520102929_drop_column.json
+1_202029051520102929_drop_column.py
 ```
 
-## Limitations
+### Inspect db tables to TortoiseORM model
 
-- Not support `rename column` now.
-- `Sqlite` and `Postgres` may not work as expected because I don\'t
-  use those in my work.
+Currently `inspectdb` support MySQL & Postgres & SQLite.
 
-## Support this project
+```shell
+Usage: aerich inspectdb [OPTIONS]
 
-- Just give a star!
-- Donation.
+  Introspects the database tables to standard output as TortoiseORM model.
 
-### AliPay
+Options:
+  -t, --table TEXT  Which tables to inspect.
+  -h, --help        Show this message and exit.
+```
 
-<img width="200" src="https://github.com/long2ice/aerich/raw/dev/images/alipay.jpeg"/>
+Inspect all tables and print to console:
 
-### WeChat Pay
+```shell
+aerich --app models inspectdb
+```
 
-<img width="200" src="https://github.com/long2ice/aerich/raw/dev/images/wechatpay.jpeg"/>
+Inspect a specified table in the default app and redirect to `models.py`:
 
-### PayPal
+```shell
+aerich inspectdb -t user > models.py
+```
 
-Donate money by [paypal](https://www.paypal.me/long2ice) to my account long2ice.
+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(primary_key=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": "postgres://postgres_user:postgres_pass@127.0.0.1:5432/db1",
+        "second": "postgres://postgres_user:postgres_pass@127.0.0.1:5432/db2",
+    },
+    "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, e.g. `aerich --app models_second migrate`.
+
+## 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
+
+async with Command(tortoise_config=config, app='models') as command:
+    await command.migrate('test')
+    await command.upgrade()
+```
+
+## Upgrade/Downgrade with `--fake` option
+
+Marks the migrations up to the latest one(or back to the target one) as applied, but without actually running the SQL to change your database schema.
+
+- Upgrade
+
+```bash
+aerich upgrade --fake
+aerich --app models upgrade --fake
+```
+- Downgrade
+
+```bash
+aerich downgrade --fake -v 2
+aerich --app models downgrade --fake -v 2
+```
+
+### Ignore tables
+
+You can tell aerich to ignore table by setting `managed=False` in the `Meta` class, e.g.:
+```py
+class MyModel(Model):
+    class Meta:
+        managed = False
+```
+**Note** `managed=False` does not recognized by `tortoise-orm` and `aerich init-db`, it is only for `aerich migrate`.
 
 ## 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 +1,282 @@
-__version__ = "0.2.2"
+from __future__ import annotations
+
+import os
+import platform
+from contextlib import AbstractAsyncContextManager
+from pathlib import Path
+from typing import TYPE_CHECKING
+
+import tortoise
+from tortoise import Tortoise, connections, 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,
+)
+
+if TYPE_CHECKING:
+    from tortoise import Model
+    from tortoise.fields.relational import ManyToManyFieldInstance  # NOQA:F401
+
+    from aerich.inspectdb import Inspect
+
+
+def _init_asyncio_patch():
+    """
+    Select compatible event loop for psycopg3.
+
+    As of Python 3.8+, the default event loop on Windows is `proactor`,
+    however psycopg3 requires the old default "selector" event loop.
+    See https://www.psycopg.org/psycopg3/docs/advanced/async.html
+    """
+    if platform.system() == "Windows":
+        try:
+            from asyncio import WindowsSelectorEventLoopPolicy  # type:ignore
+        except ImportError:
+            pass  # Can't assign a policy which doesn't exist.
+        else:
+            from asyncio import get_event_loop_policy, set_event_loop_policy
+
+            if not isinstance(get_event_loop_policy(), WindowsSelectorEventLoopPolicy):
+                set_event_loop_policy(WindowsSelectorEventLoopPolicy())
+
+
+def _init_tortoise_0_24_1_patch():
+    # this patch is for "tortoise-orm==0.24.1" to fix:
+    # https://github.com/tortoise/tortoise-orm/issues/1893
+    if tortoise.__version__ != "0.24.1":
+        return
+    from tortoise.backends.base.schema_generator import BaseSchemaGenerator, cast, re
+
+    def _get_m2m_tables(
+        self, model: type[Model], db_table: str, safe: bool, models_tables: list[str]
+    ) -> list[str]:  # Copied from tortoise-orm
+        m2m_tables_for_create = []
+        for m2m_field in model._meta.m2m_fields:
+            field_object = cast("ManyToManyFieldInstance", model._meta.fields_map[m2m_field])
+            if field_object._generated or field_object.through in models_tables:
+                continue
+            backward_key, forward_key = field_object.backward_key, field_object.forward_key
+            if field_object.db_constraint:
+                backward_fk = self._create_fk_string(
+                    "",
+                    backward_key,
+                    db_table,
+                    model._meta.db_pk_column,
+                    field_object.on_delete,
+                    "",
+                )
+                forward_fk = self._create_fk_string(
+                    "",
+                    forward_key,
+                    field_object.related_model._meta.db_table,
+                    field_object.related_model._meta.db_pk_column,
+                    field_object.on_delete,
+                    "",
+                )
+            else:
+                backward_fk = forward_fk = ""
+            exists = "IF NOT EXISTS " if safe else ""
+            through_table_name = field_object.through
+            backward_type = self._get_pk_field_sql_type(model._meta.pk)
+            forward_type = self._get_pk_field_sql_type(field_object.related_model._meta.pk)
+            comment = ""
+            if desc := field_object.description:
+                comment = self._table_comment_generator(table=through_table_name, comment=desc)
+            m2m_create_string = self.M2M_TABLE_TEMPLATE.format(
+                exists=exists,
+                table_name=through_table_name,
+                backward_fk=backward_fk,
+                forward_fk=forward_fk,
+                backward_key=backward_key,
+                backward_type=backward_type,
+                forward_key=forward_key,
+                forward_type=forward_type,
+                extra=self._table_generate_extra(table=field_object.through),
+                comment=comment,
+            )
+            if not field_object.db_constraint:
+                m2m_create_string = m2m_create_string.replace(
+                    """,
+    ,
+    """,
+                    "",
+                )  # may have better way
+            m2m_create_string += self._post_table_hook()
+            if getattr(field_object, "create_unique_index", field_object.unique):
+                unique_index_create_sql = self._get_unique_index_sql(
+                    exists, through_table_name, [backward_key, forward_key]
+                )
+                if unique_index_create_sql.endswith(";"):
+                    m2m_create_string += "\n" + unique_index_create_sql
+                else:
+                    lines = m2m_create_string.splitlines()
+                    lines[-2] += ","
+                    indent = m.group() if (m := re.match(r"\s+", lines[-2])) else ""
+                    lines.insert(-1, indent + unique_index_create_sql)
+                    m2m_create_string = "\n".join(lines)
+            m2m_tables_for_create.append(m2m_create_string)
+        return m2m_tables_for_create
+
+    setattr(BaseSchemaGenerator, "_get_m2m_tables", _get_m2m_tables)
+
+
+_init_asyncio_patch()
+_init_tortoise_0_24_1_patch()
+
+
+class Command(AbstractAsyncContextManager):
+    def __init__(
+        self,
+        tortoise_config: dict,
+        app: str = "models",
+        location: str = "./migrations",
+    ) -> None:
+        self.tortoise_config = tortoise_config
+        self.app = app
+        self.location = location
+        Migrate.app = app
+
+    async def init(self) -> None:
+        await Migrate.init(self.tortoise_config, self.app, self.location)
+
+    async def __aenter__(self) -> Command:
+        await self.init()
+        return self
+
+    async def close(self) -> None:
+        await connections.close_all()
+
+    async def __aexit__(self, *args, **kw) -> None:
+        await self.close()
+
+    async def _upgrade(self, conn, version_file, fake: bool = False) -> None:
+        file_path = Path(Migrate.migrate_location, version_file)
+        m = import_py_file(file_path)
+        upgrade = m.upgrade
+        if not fake:
+            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, fake: bool = False) -> list[str]:
+        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, fake=fake)
+                else:
+                    app_conn = get_app_connection(self.tortoise_config, self.app)
+                    await self._upgrade(app_conn, version_file, fake=fake)
+                migrated.append(version_file)
+        return migrated
+
+    async def downgrade(self, version: int, delete: bool, fake: bool = False) -> list[str]:
+        ret: list[str] = []
+        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_obj in versions:
+            file = version_obj.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 = m.downgrade
+                downgrade_sql = await downgrade(conn)
+                if not downgrade_sql.strip():
+                    raise DowngradeError("No downgrade items found")
+                if not fake:
+                    await conn.execute_script(downgrade_sql)
+                await version_obj.delete()
+                if delete:
+                    os.unlink(file_path)
+                ret.append(file)
+        return ret
+
+    async def heads(self) -> list[str]:
+        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) -> list[str]:
+        versions = Migrate.get_all_version_files()
+        return [version for version in versions]
+
+    async def inspectdb(self, tables: list[str] | None = None) -> str:
+        connection = get_app_connection(self.tortoise_config, self.app)
+        dialect = connection.schema_generator.DIALECT
+        if dialect == "mysql":
+            cls: type[Inspect] = 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", empty: bool = False) -> str:
+        return await Migrate.migrate(name, empty)
+
+    async def init_db(self, safe: bool) -> None:
+        location = self.location
+        app = self.app
+        dirname = Path(location, app)
+        if not dirname.exists():
+            dirname.mkdir(parents=True)
+        else:
+            # If directory is empty, go ahead, otherwise raise FileExistsError
+            for unexpected_file in dirname.glob("*"):
+                raise FileExistsError(str(unexpected_file))
+
+        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/__main__.py

@@ -0,0 +1,3 @@
+from .cli import main
+
+main()

aerich/_compat.py

@@ -0,0 +1,28 @@
+# mypy: disable-error-code="no-redef"
+from __future__ import annotations
+
+import sys
+from types import ModuleType
+
+import tortoise
+
+if sys.version_info >= (3, 11):
+    import tomllib
+else:
+    try:
+        import tomli as tomllib
+    except ImportError:
+        import tomlkit as tomllib
+
+
+def imports_tomlkit() -> ModuleType:
+    try:
+        import tomli_w as tomlkit
+    except ImportError:
+        import tomlkit
+    return tomlkit
+
+
+def tortoise_version_less_than(version: str) -> bool:
+    # The min version of tortoise is '0.11.0', so we can compare it by a `<`,
+    return tortoise.__version__ < version

aerich/cli.py

@@ -1,248 +1,298 @@
-import functools
-import json
+from __future__ import annotations
+
 import os
-import sys
-from configparser import ConfigParser
-from enum import Enum
+from pathlib import Path
+from typing import cast
 
 import asyncclick as click
 from asyncclick import Context, UsageError
-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.migrate import Migrate
-from aerich.utils import get_app_connection, get_app_connection_name, get_tortoise_config
+from aerich import Command
+from aerich._compat import imports_tomlkit, tomllib
+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 _patch_context_to_close_tortoise_connections_when_exit() -> None:
+    from tortoise import Tortoise, connections
+
+    origin_aexit = Context.__aexit__
+
+    async def aexit(*args, **kw) -> None:
+        await origin_aexit(*args, **kw)
+        if Tortoise._inited:
+            await connections.close_all()
+
+    Context.__aexit__ = aexit  # type:ignore[method-assign]
 
 
-parser = ConfigParser()
-
-
-def close_db(func):
-    @functools.wraps(func)
-    async def close_db_inner(*args, **kwargs):
-        result = await func(*args, **kwargs)
-        await Tortoise.close_connections()
-        return result
-
-    return close_db_inner
+_patch_context_to_close_tortoise_connections_when_exit()
 
 
 @click.group(context_settings={"help_option_names": ["-h", "--help"]})
 @click.version_option(__version__, "-V", "--version")
 @click.option(
-    "-c", "--config", default="aerich.ini", show_default=True, help="Config file.",
+    "-c",
+    "--config",
+    default="pyproject.toml",
+    show_default=True,
+    help="Config file.",
 )
 @click.option("--app", required=False, help="Tortoise-ORM app name.")
-@click.option(
-    "-n",
-    "--name",
-    default="aerich",
-    show_default=True,
-    help="Name of section in .ini file to use for aerich config.",
-)
 @click.pass_context
-async def cli(ctx: Context, config, app, name):
+async def cli(ctx: Context, config, app) -> None:
     ctx.ensure_object(dict)
     ctx.obj["config_file"] = config
-    ctx.obj["name"] = name
 
     invoked_subcommand = ctx.invoked_subcommand
     if invoked_subcommand != "init":
-        if not os.path.exists(config):
-            raise UsageError("You must exec init first", ctx=ctx)
-        parser.read(config)
-
-        location = parser[name]["location"]
-        tortoise_orm = parser[name]["tortoise_orm"]
-
+        config_path = Path(config)
+        if not config_path.exists():
+            raise UsageError(
+                "You need to run `aerich init` first to create the config file.", ctx=ctx
+            )
+        content = config_path.read_text("utf-8")
+        doc: dict = tomllib.loads(content)
+        try:
+            tool = cast("dict[str, str]", doc["tool"]["aerich"])
+            location = tool["location"]
+            tortoise_orm = tool["tortoise_orm"]
+            src_folder = tool.get("src_folder", CONFIG_DEFAULT_VALUES["src_folder"])
+        except KeyError as e:
+            raise UsageError(
+                "You need run `aerich init` again when upgrading to aerich 0.6.0+."
+            ) from e
+        add_src_path(src_folder)
         tortoise_config = get_tortoise_config(ctx, tortoise_orm)
-        app = app or list(tortoise_config.get("apps").keys())[0]
-        if "aerich.models" not in tortoise_config.get("apps").get(app).get("models"):
-            raise UsageError("Check your tortoise config and add aerich.models to it.", ctx=ctx)
-        ctx.obj["config"] = tortoise_config
-        ctx.obj["location"] = location
-        ctx.obj["app"] = app
-
+        if not app:
+            try:
+                apps_config = cast(dict, tortoise_config["apps"])
+            except KeyError:
+                raise UsageError('Config must define "apps" section')
+            app = list(apps_config.keys())[0]
+        command = Command(tortoise_config=tortoise_config, app=app, location=location)
+        ctx.obj["command"] = command
         if invoked_subcommand != "init-db":
-            await Migrate.init_with_old_models(tortoise_config, app, location)
+            if not Path(location, app).exists():
+                raise UsageError(
+                    "You need to run `aerich init-db` first to initialize the database.", ctx=ctx
+                )
+            await command.init()
 
 
-@cli.command(help="Generate migrate changes file.")
-@click.option("--name", default="update", show_default=True, help="Migrate name.")
+@cli.command(help="Generate a migration file for the current state of the models.")
+@click.option("--name", default="update", show_default=True, help="Migration name.")
+@click.option("--empty", default=False, is_flag=True, help="Generate an empty migration file.")
 @click.pass_context
-@close_db
-async def migrate(ctx: Context, name):
-    config = ctx.obj["config"]
-    location = ctx.obj["location"]
-    app = ctx.obj["app"]
-
-    ret = await Migrate.migrate(name)
+async def migrate(ctx: Context, name, empty) -> None:
+    command = ctx.obj["command"]
+    ret = await command.migrate(name, empty)
     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)
+    click.secho(f"Success creating migration file {ret}", fg=Color.green)
 
 
-@cli.command(help="Upgrade to latest version.")
+@cli.command(help="Upgrade to specified migration version.")
+@click.option(
+    "--in-transaction",
+    "-i",
+    default=True,
+    type=bool,
+    help="Make migrations in a single transaction or not. Can be helpful for large migrations or creating concurrent indexes.",
+)
+@click.option(
+    "--fake",
+    default=False,
+    is_flag=True,
+    help="Mark migrations as run without actually running them.",
+)
 @click.pass_context
-@close_db
-async def upgrade(ctx: Context):
-    config = ctx.obj["config"]
-    app = ctx.obj["app"]
-    migrated = False
-    for version in Migrate.get_all_version_files():
-        try:
-            exists = await Aerich.exists(version=version, app=app)
-        except OperationalError:
-            exists = False
-        if not exists:
-            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", encoding="utf-8") as f:
-                    content = json.load(f)
-                    upgrade_query_list = content.get("upgrade")
-                    for upgrade_query in upgrade_query_list:
-                        await conn.execute_script(upgrade_query)
-                await Aerich.create(version=version, app=app)
-            click.secho(f"Success upgrade {version}", fg=Color.green)
-            migrated = True
+async def upgrade(ctx: Context, in_transaction: bool, fake: bool) -> None:
+    command = ctx.obj["command"]
+    migrated = await command.upgrade(run_in_transaction=in_transaction, fake=fake)
     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:
+            if fake:
+                click.echo(
+                    f"Upgrading to {version_file}... " + click.style("FAKED", fg=Color.green)
+                )
+            else:
+                click.secho(f"Success upgrading to {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=False,
+    help="Specified version, default to last migration.",
+)
+@click.option(
+    "-d",
+    "--delete",
+    is_flag=True,
+    default=False,
+    show_default=True,
+    help="Also delete the migration files.",
+)
+@click.option(
+    "--fake",
+    default=False,
+    is_flag=True,
+    help="Mark migrations as run without actually running them.",
+)
 @click.pass_context
-@close_db
-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", encoding="utf-8") as f:
-            content = json.load(f)
-            downgrade_query_list = content.get("downgrade")
-            if not downgrade_query_list:
-                return click.secho("No downgrade item found", fg=Color.yellow)
-            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: you might lose your data! Are you sure?",
+)
+async def downgrade(ctx: Context, version: int, delete: bool, fake: bool) -> None:
+    command = ctx.obj["command"]
+    try:
+        files = await command.downgrade(version, delete, fake=fake)
+    except DowngradeError as e:
+        return click.secho(str(e), fg=Color.yellow)
+    for file in files:
+        if fake:
+            click.echo(f"Downgrading to {file}... " + click.style("FAKED", fg=Color.green))
+        else:
+            click.secho(f"Success downgrading to {file}", fg=Color.green)
 
 
-@cli.command(help="Show current available heads in migrate location.")
+@cli.command(help="Show currently available heads (unapplied migrations).")
 @click.pass_context
-@close_db
-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):
+async def heads(ctx: Context) -> None:
+    command = ctx.obj["command"]
+    head_list = await command.heads()
+    if not head_list:
+        return click.secho("No available heads.", fg=Color.green)
+    for version in head_list:
         click.secho(version, fg=Color.green)
-            is_heads = True
-    if not is_heads:
-        click.secho("No available heads,try migrate", fg=Color.green)
 
 
-@cli.command(help="List all migrate items.")
+@cli.command(help="List all migrations.")
 @click.pass_context
-@close_db
-async def history(ctx: Context):
-    versions = Migrate.get_all_version_files()
-    for version in versions:
-        click.secho(version, fg=Color.green)
+async def history(ctx: Context) -> None:
+    command = ctx.obj["command"]
+    versions = await command.history()
     if not versions:
-        click.secho("No history,try migrate", fg=Color.green)
+        return click.secho("No migrations created yet.", fg=Color.green)
+    for version in versions:
+        click.secho(version, fg=Color.green)
 
 
-@cli.command(help="Init config file and generate root migrate location.")
+def _write_config(config_path, doc, table) -> None:
+    tomlkit = imports_tomlkit()
+
+    try:
+        doc["tool"]["aerich"] = table
+    except KeyError:
+        doc["tool"] = {"aerich": table}
+    config_path.write_text(tomlkit.dumps(doc))
+
+
+@cli.command(help="Initialize aerich config and create migrations folder.")
 @click.option(
     "-t",
     "--tortoise-orm",
     required=True,
-    help="Tortoise-ORM config module dict variable, like settings.TORTOISE_ORM.",
+    help="Tortoise-ORM config dict location, like `settings.TORTOISE_ORM`.",
 )
 @click.option(
-    "--location", default="./migrations", show_default=True, help="Migrate store location."
+    "--location",
+    default="./migrations",
+    show_default=True,
+    help="Migrations folder.",
+)
+@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,
-):
+async def init(ctx: Context, tortoise_orm, location, src_folder) -> None:
     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", encoding="utf-8") 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)
+    content = config_path.read_text("utf-8") if config_path.exists() else "[tool.aerich]"
+    doc: dict = tomllib.loads(content)
 
-    if not os.path.isdir(location):
-        os.mkdir(location)
+    table = {"tortoise_orm": tortoise_orm, "location": location, "src_folder": src_folder}
+    if (aerich_config := doc.get("tool", {}).get("aerich")) and all(
+        aerich_config.get(k) == v for k, v in table.items()
+    ):
+        click.echo(f"Aerich config {config_file} already inited.")
+    else:
+        _write_config(config_path, doc, table)
+        click.secho(f"Success writing aerich config to {config_file}", fg=Color.green)
 
-    click.secho(f"Success create migrate location {location}", fg=Color.green)
-    click.secho(f"Success generate config file {config_file}", fg=Color.green)
+    Path(location).mkdir(parents=True, exist_ok=True)
+    click.secho(f"Success creating migrations folder {location}", fg=Color.green)
 
 
-@cli.command(help="Generate schema and generate app migrate location.")
+@cli.command(help="Generate schema and generate app migration folder.")
 @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.",
+    help="Create tables only when they do not already exist.",
     show_default=True,
 )
 @click.pass_context
-@close_db
-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)
-        click.secho(f"Success create app migrate location {dirname}", fg=Color.green)
-    else:
-        return click.secho(f"Inited {app} already", 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)
-
-    schema = get_schema_sql(connection, safe)
-
-    version = await Migrate.generate_version()
-    await Aerich.create(version=version, app=app)
-    with open(os.path.join(dirname, version), "w", encoding="utf-8") as f:
-        content = {
-            "upgrade": [schema],
-        }
-        json.dump(content, f, ensure_ascii=False, indent=2)
-    return click.secho(f'Success generate schema for app "{app}"', fg=Color.green)
+async def init_db(ctx: Context, safe: bool) -> None:
+    command = ctx.obj["command"]
+    app = command.app
+    dirname = Path(command.location, app)
+    try:
+        await command.init_db(safe)
+        click.secho(f"Success creating app migration folder {dirname}", fg=Color.green)
+        click.secho(f'Success generating initial migration file for app "{app}"', fg=Color.green)
+    except FileExistsError:
+        return click.secho(
+            f"App {app} is already initialized. Delete {dirname} and try again.", fg=Color.yellow
+        )
 
 
-def main():
-    sys.path.insert(0, ".")
-    cli(_anyio_backend="asyncio")
+@cli.command(help="Prints the current database tables to stdout as Tortoise-ORM models.")
+@click.option(
+    "-t",
+    "--table",
+    help="Which tables to inspect.",
+    multiple=True,
+    required=False,
+)
+@click.pass_context
+async def inspectdb(ctx: Context, table: list[str]) -> None:
+    command = ctx.obj["command"]
+    ret = await command.inspectdb(table)
+    click.secho(ret)
+
+
+def main() -> None:
+    cli()
+
+
+if __name__ == "__main__":
+    main()

aerich/coder.py

@@ -0,0 +1,49 @@
+from __future__ import annotations
+
+import base64
+import json
+import pickle  # nosec: B301,B403
+from typing import Any
+
+from tortoise.indexes import Index
+
+
+class JsonEncoder(json.JSONEncoder):
+    def default(self, obj) -> Any:
+        if isinstance(obj, Index):
+            if hasattr(obj, "describe"):
+                # For tortoise>=0.24
+                return obj.describe()
+            return {
+                "type": "index",
+                "val": base64.b64encode(pickle.dumps(obj)).decode(),  # nosec: B301
+            }
+        else:
+            return super().default(obj)
+
+
+def object_hook(obj) -> Any:
+    if (type_ := obj.get("type")) and type_ == "index" and (val := obj.get("val")):
+        return pickle.loads(base64.b64decode(val))  # nosec: B301
+    return obj
+
+
+def load_index(obj: dict) -> Index:
+    """Convert a dict that generated by `Index.decribe()` to a Index instance"""
+    try:
+        index = Index(fields=obj["fields"] or obj["expressions"], name=obj.get("name"))
+    except KeyError:
+        return object_hook(obj)
+    if extra := obj.get("extra"):
+        index.extra = extra
+    if idx_type := obj.get("type"):
+        index.INDEX_TYPE = idx_type
+    return index
+
+
+def encoder(obj: dict) -> str:
+    return json.dumps(obj, cls=JsonEncoder)
+
+
+def decoder(obj: str | bytes) -> Any:
+    return json.loads(obj, object_hook=object_hook)

aerich/ddl/__init__.py

@@ -1,68 +1,108 @@
-from typing import List, Type
+from __future__ import annotations
+
+import re
+from enum import Enum
+from typing import TYPE_CHECKING, Any, cast
 
-from tortoise import BaseDBAsyncClient, ForeignKeyFieldInstance, ManyToManyFieldInstance, Model
 from tortoise.backends.base.schema_generator import BaseSchemaGenerator
-from tortoise.fields import Field, JSONField, TextField, UUIDField
+
+from aerich._compat import tortoise_version_less_than
+from aerich.utils import is_default_function
+
+if TYPE_CHECKING:
+    from tortoise import BaseDBAsyncClient, Model
 
 
 class BaseDDL:
-    schema_generator_cls: Type[BaseSchemaGenerator] = BaseSchemaGenerator
+    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})'
+    _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_INDEX_TEMPLATE = 'ALTER TABLE "{table_name}" ADD {index_type}{unique}INDEX "{index_name}" ({column_names}){extra}'
+    _DROP_INDEX_TEMPLATE = 'ALTER TABLE "{table_name}" DROP INDEX IF EXISTS "{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};'
+    _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"):
+    def __init__(self, client: BaseDBAsyncClient) -> None:
         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"]
+    @staticmethod
+    def get_table_name(model: type[Model]) -> str:
+        return model._meta.db_table
 
-    def drop_table(self, model: "Type[Model]"):
-        return self._DROP_TABLE_TEMPLATE.format(table_name=model._meta.db_table)
+    def create_table(self, model: type[Model]) -> str:
+        schema = self.schema_generator._get_table_sql(model, True)["table_creation_string"]
+        if tortoise_version_less_than("0.23.1"):
+            # Remove extra space
+            schema = re.sub(r'(["()A-Za-z])  (["()A-Za-z])', r"\1 \2", schema)
+        return schema.rstrip(";")
 
-    def create_m2m_table(self, model: "Type[Model]", field: ManyToManyFieldInstance):
+    def drop_table(self, table_name: str) -> str:
+        return self._DROP_TABLE_TEMPLATE.format(table_name=table_name)
+
+    def create_m2m(
+        self, model: type[Model], field_describe: dict, reference_table_describe: dict
+    ) -> str:
+        through = cast(str, field_describe.get("through"))
+        description = field_describe.get("description")
+        pk_field = cast(dict, reference_table_describe.get("pk_field"))
+        reference_id = pk_field.get("db_column")
+        db_field_types = cast(dict, 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),
-            comment=self.schema_generator._table_comment_generator(
-                table=field.through, comment=field.description
-            )
-            if field.description
-            else "",
+            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=through, comment=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) -> str:
+        return self._DROP_TABLE_TEMPLATE.format(table_name=table_name)
 
-    def _get_default(self, model: "Type[Model]", field_object: Field):
+    def _get_default(self, model: type[Model], field_describe: dict) -> Any:
         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 = cast(str, 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,
@@ -73,118 +113,190 @@ class BaseDDL:
                     )
                 except NotImplementedError:
                     default = ""
-        else:
-            default = ""
         return default
 
-    def add_column(self, model: "Type[Model]", field_object: Field):
+    def add_column(self, model: type[Model], field_describe: dict, is_pk: bool = False) -> str:
+        return self._add_or_modify_column(model, field_describe, is_pk)
+
+    def _add_or_modify_column(
+        self, model: type[Model], field_describe: dict, is_pk: bool, modify: bool = False
+    ) -> str:
         db_table = model._meta.db_table
-
-        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 "",
-                comment=self.schema_generator._column_comment_generator(
+        description = field_describe.get("description")
+        db_column = cast(str, field_describe.get("db_column"))
+        db_field_types = cast(dict, field_describe.get("db_field_types"))
+        default = self._get_default(model, field_describe)
+        if default is None:
+            default = ""
+        if modify:
+            unique = ""
+            template = self._MODIFY_COLUMN_TEMPLATE
+        else:
+            # sqlite does not support alter table to add unique column
+            unique = " UNIQUE" if field_describe.get("unique") and self.DIALECT != "sqlite" else ""
+            template = self._ADD_COLUMN_TEMPLATE
+        column = self.schema_generator._create_string(
+            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,
+            comment=(
+                self.schema_generator._column_comment_generator(
                     table=db_table,
-                    column=field_object.model_field_name,
-                    comment=field_object.description,
+                    column=db_column,
+                    comment=description,
                 )
-                if field_object.description
-                else "",
-                is_primary_key=field_object.pk,
-                default=self._get_default(model, field_object),
+                if description
+                else ""
             ),
+            is_primary_key=is_pk,
+            default=default,
         )
+        if tortoise_version_less_than("0.23.1"):
+            column = column.replace("  ", " ")
+        return template.format(table_name=db_table, column=column)
 
-    def drop_column(self, model: "Type[Model]", column_name: str):
+    def drop_column(self, model: type[Model], column_name: str) -> str:
         return self._DROP_COLUMN_TEMPLATE.format(
             table_name=model._meta.db_table, column_name=column_name
         )
 
-    def modify_column(self, model: "Type[Model]", field_object: Field):
-        db_table = model._meta.db_table
-        return self._MODIFY_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="",
-                comment=self.schema_generator._column_comment_generator(
-                    table=db_table,
-                    column=field_object.model_field_name,
-                    comment=field_object.description,
-                )
-                if field_object.description
-                else "",
-                is_primary_key=field_object.pk,
-                default=self._get_default(model, field_object),
-            ),
+    def modify_column(self, model: type[Model], field_describe: dict, is_pk: bool = False) -> str:
+        return self._add_or_modify_column(model, field_describe, is_pk, modify=True)
+
+    def rename_column(self, model: type[Model], old_column_name: str, new_column_name: str) -> 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 add_index(self, model: "Type[Model]", field_names: List[str], unique=False):
+    def change_column(
+        self, model: type[Model], old_column_name: str, new_column_name: str, new_column_type: str
+    ) -> 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 _index_name(self, unique: bool | None, model: type[Model], field_names: list[str]) -> str:
+        func_name = "_get_index_name"
+        if not hasattr(self.schema_generator, func_name):
+            # For tortoise-orm<0.24.1
+            func_name = "_generate_index_name"
+        return getattr(self.schema_generator, func_name)(
+            "idx" if not unique else "uid", model, field_names
+        )
+
+    def add_index(
+        self,
+        model: type[Model],
+        field_names: list[str],
+        unique: bool | None = False,
+        name: str | None = None,
+        index_type: str = "",
+        extra: str | None = "",
+    ) -> str:
         return self._ADD_INDEX_TEMPLATE.format(
-            unique="UNIQUE" if unique else "",
-            index_name=self.schema_generator._generate_index_name(
-                "idx" if not unique else "uid", model, field_names
-            ),
+            unique="UNIQUE " if unique else "",
+            index_name=name or self._index_name(unique, 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),
+            index_type=f"{index_type} " if index_type else "",
+            extra=f"{extra}" if extra else "",
         )
 
-    def drop_index(self, model: "Type[Model]", field_names: List[str], unique=False):
+    def drop_index(
+        self,
+        model: type[Model],
+        field_names: list[str],
+        unique: bool | None = False,
+        name: str | None = None,
+    ) -> str:
         return self._DROP_INDEX_TEMPLATE.format(
-            index_name=self.schema_generator._generate_index_name(
-                "idx" if not unique else "uid", model, field_names
-            ),
+            index_name=name or self._index_name(unique, model, field_names),
             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) -> str:
+        return self.drop_index(model, [], name=index_name)
 
-        db_column = field.source_field or field.model_field_name + "_id"
-        fk_name = self.schema_generator._generate_fk_name(
+    def _generate_fk_name(
+        self, db_table: str, field_describe: dict, reference_table_describe: dict
+    ) -> str:
+        """Generate fk name"""
+        db_column = cast(str, field_describe.get("raw_field"))
+        pk_field = cast(dict, reference_table_describe.get("pk_field"))
+        to_field = cast(str, pk_field.get("db_column"))
+        to_table = cast(str, reference_table_describe.get("table"))
+        func_name = "_get_fk_name"
+        if not hasattr(self.schema_generator, func_name):
+            # For tortoise-orm<0.24.1
+            func_name = "_generate_fk_name"
+        return getattr(self.schema_generator, func_name)(
             from_table=db_table,
             from_field=db_column,
-            to_table=field.related_model._meta.db_table,
-            to_field=to_field_name,
+            to_table=to_table,
+            to_field=to_field,
         )
+
+    def add_fk(
+        self, model: type[Model], field_describe: dict, reference_table_describe: dict
+    ) -> str:
+        db_table = model._meta.db_table
+
+        db_column = field_describe.get("raw_field")
+        pk_field = cast(dict, reference_table_describe.get("pk_field"))
+        reference_id = pk_field.get("db_column")
         return self._ADD_FK_TEMPLATE.format(
             table_name=db_table,
-            fk_name=fk_name,
+            fk_name=self._generate_fk_name(db_table, field_describe, reference_table_describe),
             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
+    ) -> str:
         db_table = model._meta.db_table
-        return self._DROP_FK_TEMPLATE.format(
+        fk_name = self._generate_fk_name(db_table, field_describe, reference_table_describe)
+        return self._DROP_FK_TEMPLATE.format(table_name=db_table, fk_name=fk_name)
+
+    def alter_column_default(self, model: type[Model], field_describe: dict) -> str:
+        db_table = model._meta.db_table
+        default = self._get_default(model, field_describe)
+        return self._ALTER_DEFAULT_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,
-            ),
+            column=field_describe.get("db_column"),
+            default="SET" + default if default is not None else "DROP DEFAULT",
         )
 
-    def alter_column_default(self, model: "Type[Model]", field_object: Field):
-        pass
+    def alter_column_null(self, model: type[Model], field_describe: dict) -> str:
+        return self.modify_column(model, field_describe)
 
-    def alter_column_null(self, model: "Type[Model]", field_object: Field):
-        pass
+    def set_comment(self, model: type[Model], field_describe: dict) -> str:
+        return self.modify_column(model, field_describe)
 
-    def set_comment(self, model: "Type[Model]", field_object: Field):
-        pass
+    def rename_table(self, model: type[Model], old_table_name: str, new_table_name: str) -> 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
+        )
+
+    def alter_indexed_column_unique(
+        self, model: type[Model], field_name: str, drop: bool = False
+    ) -> list[str]:
+        """Change unique constraint for indexed field, e.g.: Field(db_index=True) --> Field(unique=True)"""
+        fields = [field_name]
+        if drop:
+            drop_unique = self.drop_index(model, fields, unique=True)
+            add_normal_index = self.add_index(model, fields, unique=False)
+            return [drop_unique, add_normal_index]
+        else:
+            drop_index = self.drop_index(model, fields, unique=False)
+            add_unique_index = self.add_index(model, fields, unique=True)
+            return [drop_index, add_unique_index]

aerich/ddl/mysql/__init__.py

@@ -1,19 +1,61 @@
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
 from tortoise.backends.mysql.schema_generator import MySQLSchemaGenerator
 
 from aerich.ddl import BaseDDL
 
+if TYPE_CHECKING:
+    from tortoise import Model
+
 
 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}"
-    _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})"
+    _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 {index_type}{unique}INDEX `{index_name}` ({column_names}){extra}"
     _DROP_INDEX_TEMPLATE = "ALTER TABLE `{table_name}` DROP INDEX `{index_name}`"
+    _ADD_INDEXED_UNIQUE_TEMPLATE = (
+        "ALTER TABLE `{table_name}` DROP INDEX `{index_name}`, ADD UNIQUE (`{column_name}`)"
+    )
+    _DROP_INDEXED_UNIQUE_TEMPLATE = (
+        "ALTER TABLE `{table_name}` DROP INDEX `{column_name}`, ADD 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};"
+    _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}`"
+
+    def _index_name(self, unique: bool | None, model: type[Model], field_names: list[str]) -> str:
+        if unique and len(field_names) == 1:
+            # Example: `email = CharField(max_length=50, unique=True)`
+            # Generate schema: `"email" VARCHAR(10) NOT NULL UNIQUE`
+            # Unique index key is the same as field name: `email`
+            return field_names[0]
+        return super()._index_name(unique, model, field_names)
+
+    def alter_indexed_column_unique(
+        self, model: type[Model], field_name: str, drop: bool = False
+    ) -> list[str]:
+        # if drop is false: Drop index and add unique
+        # else: Drop unique index and add normal index
+        template = self._DROP_INDEXED_UNIQUE_TEMPLATE if drop else self._ADD_INDEXED_UNIQUE_TEMPLATE
+        table = self.get_table_name(model)
+        index = self._index_name(unique=False, model=model, field_names=[field_name])
+        return [template.format(table_name=table, index_name=index, column_name=field_name)]

aerich/ddl/postgres/__init__.py

@@ -1,50 +1,53 @@
-from typing import Type
+from __future__ import annotations
+
+from typing import cast
 
 from tortoise import Model
-from tortoise.backends.asyncpg.schema_generator import AsyncpgSchemaGenerator
-from tortoise.fields import Field
+from tortoise.backends.base_postgres.schema_generator import BasePostgresSchemaGenerator
 
 from aerich.ddl import BaseDDL
 
 
 class PostgresDDL(BaseDDL):
-    schema_generator_cls = AsyncpgSchemaGenerator
-    DIALECT = AsyncpgSchemaGenerator.DIALECT
-    _ALTER_DEFAULT_TEMPLATE = 'ALTER TABLE "{table_name}" ALTER COLUMN "{column}" {default}'
+    schema_generator_cls = BasePostgresSchemaGenerator
+    DIALECT = BasePostgresSchemaGenerator.DIALECT
+    _ADD_INDEX_TEMPLATE = 'CREATE {unique}INDEX IF NOT EXISTS "{index_name}" ON "{table_name}" {index_type}({column_names}){extra}'
+    _DROP_INDEX_TEMPLATE = 'DROP INDEX IF EXISTS "{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}'
-    _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_default(self, model: "Type[Model]", field_object: Field):
-        db_table = model._meta.db_table
-        default = self._get_default(model, field_object)
-        return self._ALTER_DEFAULT_TEMPLATE.format(
-            table_name=db_table,
-            column=field_object.model_field_name,
-            default="SET" + default if default else "DROP DEFAULT",
+    _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 IF EXISTS "{fk_name}"'
 
-    def alter_column_null(self, model: "Type[Model]", field_object: Field):
+    def alter_column_null(self, model: type[Model], field_describe: dict) -> str:
         db_table = model._meta.db_table
         return self._ALTER_NULL_TEMPLATE.format(
             table_name=db_table,
-            column=field_object.model_field_name,
-            set_drop="DROP" if field_object.null else "SET",
+            column=field_describe.get("db_column"),
+            set_drop="DROP" if field_describe.get("nullable") else "SET",
         )
 
-    def modify_column(self, model: "Type[Model]", field_object: Field):
+    def modify_column(self, model: type[Model], field_describe: dict, is_pk: bool = False) -> str:
         db_table = model._meta.db_table
+        db_field_types = cast(dict, 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=field_object.model_field_name,
-            datatype=field_object.get_for_dialect(self.DIALECT, "SQL_TYPE"),
+            column=db_column,
+            datatype=datatype,
+            using=f' USING "{db_column}"::{datatype}',
         )
 
-    def set_comment(self, model: "Type[Model]", field_object: Field):
+    def set_comment(self, model: type[Model], field_describe: dict) -> str:
         db_table = model._meta.db_table
         return self._SET_COMMENT_TEMPLATE.format(
             table_name=db_table,
-            column=field_object.model_field_name,
-            comment="'{}'".format(field_object.description) if field_object.description else "NULL",
+            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 +1,26 @@
+from __future__ import annotations
+
+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
+    _ADD_INDEX_TEMPLATE = 'CREATE {unique}INDEX "{index_name}" ON "{table_name}" ({column_names})'
+    _DROP_INDEX_TEMPLATE = 'DROP INDEX IF EXISTS "{index_name}"'
+
+    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 +1,192 @@
+from __future__ import annotations
+
+import contextlib
+from typing import Any, Callable, Dict, TypedDict
+
+from pydantic import BaseModel
+from tortoise import BaseDBAsyncClient
+
+
+class ColumnInfoDict(TypedDict):
+    name: str
+    pk: str
+    index: str
+    null: str
+    default: str
+    length: str
+    comment: str
+
+
+# TODO: use dict to replace typing.Dict when dropping support for Python3.8
+FieldMapDict = Dict[str, Callable[..., str]]
+
+
+class Column(BaseModel):
+    name: str
+    data_type: str
+    null: bool
+    default: Any
+    comment: str | None = None
+    pk: bool
+    unique: bool
+    index: bool
+    length: int | None = None
+    extra: str | None = None
+    decimal_places: int | None = None
+    max_digits: int | None = None
+
+    def translate(self) -> ColumnInfoDict:
+        comment = default = length = index = null = pk = ""
+        if self.pk:
+            pk = "primary_key=True, "
+        else:
+            if self.unique:
+                index = "unique=True, "
+            elif self.index:
+                index = "db_index=True, "
+        if self.data_type in ("varchar", "VARCHAR"):
+            length = f"max_length={self.length}, "
+        elif 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}")
+            if length_parts:
+                length = ", ".join(length_parts) + ", "
+        if self.null:
+            null = "null=True, "
+        if self.default is not None and not self.pk:
+            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 self.default == "CURRENT_TIMESTAMP":
+                    if self.extra == "DEFAULT_GENERATED on update CURRENT_TIMESTAMP":
+                        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 = ""
+                elif self.default == "":
+                    default = '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: list[str] | None = None) -> None:
+        self.conn = conn
+        with contextlib.suppress(AttributeError):
+            self.database = conn.database  # type:ignore[attr-defined]
+        self.tables = tables
+
+    @property
+    def field_map(self) -> FieldMapDict:
+        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
+
+    @staticmethod
+    def get_field_string(
+        field_class: str, arguments: str = "{null}{default}{comment}", **kwargs
+    ) -> str:
+        name = kwargs["name"]
+        field_params = arguments.format(**kwargs).strip().rstrip(",")
+        return f"{name} = fields.{field_class}({field_params})"
+
+    @classmethod
+    def decimal_field(cls, **kwargs) -> str:
+        return cls.get_field_string("DecimalField", **kwargs)
+
+    @classmethod
+    def time_field(cls, **kwargs) -> str:
+        return cls.get_field_string("TimeField", **kwargs)
+
+    @classmethod
+    def date_field(cls, **kwargs) -> str:
+        return cls.get_field_string("DateField", **kwargs)
+
+    @classmethod
+    def float_field(cls, **kwargs) -> str:
+        return cls.get_field_string("FloatField", **kwargs)
+
+    @classmethod
+    def datetime_field(cls, **kwargs) -> str:
+        return cls.get_field_string("DatetimeField", **kwargs)
+
+    @classmethod
+    def text_field(cls, **kwargs) -> str:
+        return cls.get_field_string("TextField", **kwargs)
+
+    @classmethod
+    def char_field(cls, **kwargs) -> str:
+        arguments = "{pk}{index}{length}{null}{default}{comment}"
+        return cls.get_field_string("CharField", arguments, **kwargs)
+
+    @classmethod
+    def int_field(cls, field_class="IntField", **kwargs) -> str:
+        arguments = "{pk}{index}{default}{comment}"
+        return cls.get_field_string(field_class, arguments, **kwargs)
+
+    @classmethod
+    def smallint_field(cls, **kwargs) -> str:
+        return cls.int_field("SmallIntField", **kwargs)
+
+    @classmethod
+    def bigint_field(cls, **kwargs) -> str:
+        return cls.int_field("BigIntField", **kwargs)
+
+    @classmethod
+    def bool_field(cls, **kwargs) -> str:
+        return cls.get_field_string("BooleanField", **kwargs)
+
+    @classmethod
+    def uuid_field(cls, **kwargs) -> str:
+        arguments = "{pk}{index}{default}{comment}"
+        return cls.get_field_string("UUIDField", arguments, **kwargs)
+
+    @classmethod
+    def json_field(cls, **kwargs) -> str:
+        return cls.get_field_string("JSONField", **kwargs)
+
+    @classmethod
+    def binary_field(cls, **kwargs) -> str:
+        return cls.get_field_string("BinaryField", **kwargs)

aerich/inspectdb/mysql.py

@@ -0,0 +1,67 @@
+from __future__ import annotations
+
+from aerich.inspectdb import Column, FieldMapDict, Inspect
+
+
+class InspectMySQL(Inspect):
+    @property
+    def field_map(self) -> FieldMapDict:
+        return {
+            "int": self.int_field,
+            "smallint": self.smallint_field,
+            "tinyint": self.bool_field,
+            "bigint": self.bigint_field,
+            "varchar": self.char_field,
+            "char": self.uuid_field,
+            "longtext": self.text_field,
+            "text": self.text_field,
+            "datetime": self.datetime_field,
+            "float": self.float_field,
+            "double": 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:
+            unique = index = False
+            if (non_unique := row["NON_UNIQUE"]) is not None:
+                unique = not non_unique
+            elif row["COLUMN_KEY"] == "UNI":
+                unique = True
+            if (index_name := row["INDEX_NAME"]) is not None:
+                index = 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=unique,
+                    extra=row["EXTRA"],
+                    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 +1,83 @@
+from __future__ import annotations
+
+import re
+from typing import TYPE_CHECKING
+
+from aerich.inspectdb import Column, FieldMapDict, Inspect
+
+if TYPE_CHECKING:
+    from tortoise.backends.base_postgres.client import BasePostgresClient
+
+
+class InspectPostgres(Inspect):
+    def __init__(self, conn: BasePostgresClient, tables: list[str] | None = None) -> None:
+        super().__init__(conn, tables)
+        self.schema = conn.server_settings.get("schema") or "public"
+
+    @property
+    def field_map(self) -> FieldMapDict:
+        return {
+            "int2": self.smallint_field,
+            "int4": self.int_field,
+            "int8": self.bigint_field,
+            "smallint": self.smallint_field,
+            "bigint": self.bigint_field,
+            "varchar": self.char_field,
+            "text": self.text_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"""  # nosec:B608
+        if "psycopg" in str(type(self.conn)).lower():
+            sql = re.sub(r"\$[123]", "%s", sql)
+        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 __future__ import annotations
+
+from aerich.inspectdb import Column, FieldMapDict, Inspect
+
+
+class InspectSQLite(Inspect):
+    @property
+    def field_map(self) -> FieldMapDict:
+        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) -> dict[str, 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/models.py

@@ -1,11 +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=MAX_VERSION_LENGTH)
-    app = fields.CharField(max_length=20)
+    app = fields.CharField(max_length=MAX_APP_LENGTH)
+    content: dict = fields.JSONField(encoder=encoder, decoder=decoder)
 
     class Meta:
         ordering = ["-id"]

aerich/utils.py

@@ -1,25 +1,52 @@
-import importlib
+from __future__ import annotations
 
-from asyncclick import BadOptionUsage, Context
+import importlib.util
+import os
+import re
+import sys
+from collections.abc import Generator
+from pathlib import Path
+from types import ModuleType
+
+from asyncclick import BadOptionUsage, ClickException, Context
+from dictdiffer import diff
 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:
-    :return:
+    :param app_name:
+    :return: the default connection name (Usally it is 'default')
     """
-    return config.get("apps").get(app).get("default_connection", "default")
+    if app := config.get("apps").get(app_name):
+        return app.get("default_connection", "default")
+    raise BadOptionUsage(option_name="--app", message=f"Can't get app named {app_name!r}")
 
 
 def get_app_connection(config, app) -> BaseDBAsyncClient:
     """
-    get connection name
+    get connection client
     :param config:
     :param app:
-    :return:
+    :return: client instance
     """
     return Tortoise.get_connection(get_app_connection_name(config, app))
 
@@ -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 +75,69 @@ 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[app].values():
+        managed = getattr(model.Meta, "managed", None)
+        describe = model.describe()
+        ret[describe.get("name")] = dict(describe, managed=managed)
+    return ret
+
+
+def is_default_function(string: str) -> re.Match | None:
+    return re.match(r"^<function.+>$", str(string or ""))
+
+
+def import_py_file(file: str | Path) -> ModuleType:
+    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)  # type:ignore[arg-type]
+    spec.loader.exec_module(module)  # type:ignore[union-attr]
+    return module
+
+
+def get_dict_diff_by_key(
+    old_fields: list[dict], new_fields: list[dict], key="through"
+) -> Generator[tuple]:
+    """
+    Compare two list by key instead of by index
+
+    :param old_fields: previous field info list
+    :param new_fields: current field info list
+    :param key: if two dicts have the same value of this key, action is change; otherwise, is remove/add
+    :return: similar to dictdiffer.diff
+
+    Example::
+
+        >>> old = [{'through': 'a'}, {'through': 'b'}, {'through': 'c'}]
+        >>> new = [{'through': 'a'}, {'through': 'c'}]  # remove the second element
+        >>> list(diff(old, new))
+        [('change', [1, 'through'], ('b', 'c')),
+         ('remove', '', [(2, {'through': 'c'})])]
+        >>> list(get_dict_diff_by_key(old, new))
+        [('remove', '', [(0, {'through': 'b'})])]
+
+    """
+    length_old, length_new = len(old_fields), len(new_fields)
+    if length_old == 0 or length_new == 0 or length_old == length_new == 1:
+        yield from diff(old_fields, new_fields)
+    else:
+        value_index: dict[str, int] = {f[key]: i for i, f in enumerate(new_fields)}
+        additions = set(range(length_new))
+        for field in old_fields:
+            value = field[key]
+            if (index := value_index.get(value)) is not None:
+                additions.remove(index)
+                yield from diff([field], [new_fields[index]])  # change
+            else:
+                yield from diff([field], [])  # remove
+        if additions:
+            for index in sorted(additions):
+                yield from diff([], [new_fields[index]])  # add

aerich/version.py

@@ -0,0 +1,3 @@
+from importlib.metadata import version
+
+__version__ = version(__package__)

conftest.py

@@ -1,28 +1,40 @@
+from __future__ import annotations
+
 import asyncio
 import os
+import sys
+from collections.abc import Generator
+from pathlib import Path
 
 import pytest
-from tortoise import Tortoise, expand_db_url, generate_schema_for_client
-from tortoise.backends.asyncpg.schema_generator import AsyncpgSchemaGenerator
+from tortoise import Tortoise, expand_db_url
+from tortoise.backends.base_postgres.schema_generator import BasePostgresSchemaGenerator
 from tortoise.backends.mysql.schema_generator import MySQLSchemaGenerator
 from tortoise.backends.sqlite.schema_generator import SqliteSchemaGenerator
+from tortoise.contrib.test import MEMORY_SQLITE
 
 from aerich.ddl.mysql import MysqlDDL
 from aerich.ddl.postgres import PostgresDDL
 from aerich.ddl.sqlite import SqliteDDL
 from aerich.migrate import Migrate
+from tests._utils import chdir, copy_files, init_db, run_shell
 
-db_url = os.getenv("TEST_DB", "sqlite://:memory:")
+db_url = os.getenv("TEST_DB", MEMORY_SQLITE)
+db_url_second = os.getenv("TEST_DB_SECOND", MEMORY_SQLITE)
 tortoise_orm = {
-    "connections": {"default": expand_db_url(db_url, True)},
+    "connections": {
+        "default": expand_db_url(db_url, testing=True),
+        "second": expand_db_url(db_url_second, testing=True),
+    },
     "apps": {
         "models": {"models": ["tests.models", "aerich.models"], "default_connection": "default"},
+        "models_second": {"models": ["tests.models_second"], "default_connection": "second"},
     },
 }
 
 
 @pytest.fixture(scope="function", autouse=True)
-def reset_migrate():
+def reset_migrate() -> None:
     Migrate.upgrade_operators = []
     Migrate.downgrade_operators = []
     Migrate._upgrade_fk_m2m_index_operators = []
@@ -32,30 +44,54 @@ def reset_migrate():
 
 
 @pytest.fixture(scope="session")
-def loop():
-    loop = asyncio.get_event_loop()
-    return loop
+def event_loop() -> Generator:
+    policy = asyncio.get_event_loop_policy()
+    res = policy.new_event_loop()
+    asyncio.set_event_loop(res)
+    res._close = res.close  # type:ignore[attr-defined]
+    res.close = lambda: None  # type:ignore[method-assign]
+
+    yield res
+
+    res._close()  # type:ignore[attr-defined]
 
 
 @pytest.fixture(scope="session", autouse=True)
-def initialize_tests(loop, request):
-    tortoise_orm["connections"]["diff_models"] = "sqlite://:memory:"
-    tortoise_orm["apps"]["diff_models"] = {
-        "models": ["tests.diff_models"],
-        "default_connection": "diff_models",
-    }
-
-    loop.run_until_complete(Tortoise.init(config=tortoise_orm, _create_db=True))
-    loop.run_until_complete(
-        generate_schema_for_client(Tortoise.get_connection("default"), safe=True)
-    )
-
+async def initialize_tests(event_loop, request) -> None:
+    await init_db(tortoise_orm)
     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:
+    elif issubclass(client.schema_generator, BasePostgresSchemaGenerator):
         Migrate.ddl = PostgresDDL(client)
+    Migrate.dialect = Migrate.ddl.DIALECT
+    request.addfinalizer(lambda: event_loop.run_until_complete(Tortoise._drop_databases()))
 
-    request.addfinalizer(lambda: loop.run_until_complete(Tortoise._drop_databases()))
+
+@pytest.fixture
+def new_aerich_project(tmp_path: Path):
+    test_dir = Path(__file__).parent / "tests"
+    asset_dir = test_dir / "assets" / "fake"
+    settings_py = asset_dir / "settings.py"
+    _tests_py = asset_dir / "_tests.py"
+    db_py = asset_dir / "db.py"
+    models_py = test_dir / "models.py"
+    models_second_py = test_dir / "models_second.py"
+    copy_files(settings_py, _tests_py, models_py, models_second_py, db_py, target_dir=tmp_path)
+    dst_dir = tmp_path / "tests"
+    dst_dir.mkdir()
+    dst_dir.joinpath("__init__.py").touch()
+    copy_files(test_dir / "_utils.py", test_dir / "indexes.py", target_dir=dst_dir)
+    if should_remove := str(tmp_path) not in sys.path:
+        sys.path.append(str(tmp_path))
+    with chdir(tmp_path):
+        run_shell("python db.py create", capture_output=False)
+        try:
+            yield
+        finally:
+            if not os.getenv("AERICH_DONT_DROP_FAKE_DB"):
+                run_shell("python db.py drop", capture_output=False)
+            if should_remove:
+                sys.path.remove(str(tmp_path))

pyproject.toml

@@ -1,42 +1,116 @@
-[tool.poetry]
+[project]
 name = "aerich"
-version = "0.2.2"
+version = "0.8.2"
 description = "A database migrations tool for Tortoise ORM."
-authors = ["long2ice <long2ice@gmail.com>"]
-license = "Apache-2.0"
+authors = [{name="long2ice", email="long2ice@gmail.com>"}]
+license = { text = "Apache-2.0" }
 readme = "README.md"
-homepage = "https://github.com/long2ice/aerich"
-repository = "https://github.com/long2ice/aerich.git"
-documentation = "https://github.com/long2ice/aerich"
 keywords = ["migrate", "Tortoise-ORM", "mysql"]
-packages = [
-    { include = "aerich" }
+packages = [{ include = "aerich" }]
+include = ["CHANGELOG.md", "LICENSE", "README.md"]
+requires-python = ">=3.8"
+dependencies = [
+  "tortoise-orm (>=0.21.0,<1.0.0); python_version < '4.0'",
+  "pydantic (>=2.0.2,!=2.1.0,!=2.7.0,<3.0.0)",
+  "dictdiffer (>=0.9.0,<1.0.0)",
+  "asyncclick (>=8.1.7,<9.0.0)",
+  "eval-type-backport (>=0.2.2,<1.0.0); python_version < '3.10'",
 ]
-include = ["CHANGELOG.rst", "LICENSE", "README.md"]
 
-[tool.poetry.dependencies]
-python = "^3.7"
-tortoise-orm = "*"
-asyncclick = "*"
-pydantic = "*"
-aiomysql = {version = "*", optional = true}
-asyncpg = {version = "*", optional = true}
+[project.optional-dependencies]
+toml = [
+    "tomli-w (>=1.1.0,<2.0.0); python_version >= '3.11'",
+    "tomlkit (>=0.11.4,<1.0.0); python_version < '3.11'",
+]
+# Need asyncpg or psyncopg for PostgreSQL
+asyncpg = ["asyncpg"]
+psycopg = ["psycopg[pool,binary] (>=3.0.12,<4.0.0)"]
+# Need asyncmy or aiomysql for MySQL
+asyncmy = ["asyncmy>=0.2.9; python_version < '4.0'"]
+mysql = ["aiomysql>=0.2.0"]
 
-[tool.poetry.dev-dependencies]
-flake8 = "*"
-isort = "*"
-black = "^19.10b0"
-pytest = "*"
-pytest-xdist = "*"
-pytest-asyncio = "*"
-bandit = "*"
+[project.urls]
+homepage = "https://github.com/tortoise/aerich"
+repository = "https://github.com/tortoise/aerich.git"
+documentation = "https://github.com/tortoise/aerich"
 
-[tool.poetry.extras]
-dbdrivers = ["aiomysql", "asyncpg"]
+[project.scripts]
+aerich = "aerich.cli:main"
+
+[tool.poetry]
+requires-poetry = ">=2.0"
+
+[tool.poetry.group.dev.dependencies]
+ruff = "^0.9.0"
+bandit = "^1.7.0"
+mypy = "^1.10.0"
+twine = "^6.1.0"
+
+[tool.poetry.group.test.dependencies]
+pytest = "^8.3.0"
+pytest-mock = "^3.14.0"
+pytest-xdist = "^3.6.0"
+# Breaking change in 0.23.*
+# https://github.com/pytest-dev/pytest-asyncio/issues/706
+pytest-asyncio = "^0.21.2"
+# required for sha256_password by asyncmy
+cryptography = {version="^44.0.1", python="!=3.9.0,!=3.9.1"}
+
+[tool.aerich]
+tortoise_orm = "conftest.tortoise_orm"
+location = "./migrations"
+src_folder = "./."
 
 [build-system]
-requires = ["poetry>=0.12"]
-build-backend = "poetry.masonry.api"
+requires = ["poetry-core>=2.0.0"]
+build-backend = "poetry.core.masonry.api"
 
-[tool.poetry.scripts]
-aerich = "aerich.cli:main"
+[tool.pytest.ini_options]
+asyncio_mode = 'auto'
+
+[tool.coverage.run]
+branch = true
+source = ["aerich"]
+
+[tool.coverage.report]
+exclude_also = [
+    "if TYPE_CHECKING:"
+]
+
+[tool.mypy]
+pretty = true
+python_version = "3.8"
+check_untyped_defs = true
+warn_unused_ignores = true
+disallow_incomplete_defs = false
+exclude = ["tests/assets", "migrations"]
+
+[[tool.mypy.overrides]]
+module = [
+    'dictdiffer.*',
+    'tomlkit',
+    'tomli_w',
+    'tomli',
+]
+ignore_missing_imports = true
+
+[tool.ruff]
+line-length = 100
+
+[tool.ruff.lint]
+extend-select = [
+    "I",      # https://docs.astral.sh/ruff/rules/#isort-i
+    "SIM",    # https://docs.astral.sh/ruff/rules/#flake8-simplify-sim
+    "FA",     # https://docs.astral.sh/ruff/rules/#flake8-future-annotations-fa
+    "UP",     # https://docs.astral.sh/ruff/rules/#pyupgrade-up
+    "RUF100", # https://docs.astral.sh/ruff/rules/#ruff-specific-rules-ruf
+]
+ignore = ["UP031"] # https://docs.astral.sh/ruff/rules/printf-string-formatting/
+
+[tool.ruff.lint.per-file-ignores]
+# TODO: Remove this line when dropping support for Python3.8
+"aerich/inspectdb/__init__.py" = ["UP006", "UP035"]
+"aerich/_compat.py" = ["F401"]
+
+[tool.bandit]
+exclude_dirs = ["tests", "conftest.py"]

setup.cfg

@@ -1,2 +0,0 @@
-[flake8]
-ignore = E501,W503

tests/_utils.py

@@ -0,0 +1,87 @@
+import contextlib
+import os
+import platform
+import shlex
+import shutil
+import subprocess
+import sys
+from pathlib import Path
+
+from tortoise import Tortoise, generate_schema_for_client
+from tortoise.exceptions import DBConnectionError, OperationalError
+
+if sys.version_info >= (3, 11):
+    from contextlib import chdir
+else:
+
+    class chdir(contextlib.AbstractContextManager):  # Copied from source code of Python3.13
+        """Non thread-safe context manager to change the current working directory."""
+
+        def __init__(self, path):
+            self.path = path
+            self._old_cwd = []
+
+        def __enter__(self):
+            self._old_cwd.append(os.getcwd())
+            os.chdir(self.path)
+
+        def __exit__(self, *excinfo):
+            os.chdir(self._old_cwd.pop())
+
+
+async def drop_db(tortoise_orm) -> None:
+    # Placing init outside the try-block(suppress) since it doesn't
+    # establish connections to the DB eagerly.
+    await Tortoise.init(config=tortoise_orm)
+    with contextlib.suppress(DBConnectionError, OperationalError):
+        await Tortoise._drop_databases()
+
+
+async def init_db(tortoise_orm, generate_schemas=True) -> None:
+    await drop_db(tortoise_orm)
+    await Tortoise.init(config=tortoise_orm, _create_db=True)
+    if generate_schemas:
+        await generate_schema_for_client(Tortoise.get_connection("default"), safe=True)
+
+
+def copy_files(*src_files: Path, target_dir: Path) -> None:
+    for src in src_files:
+        shutil.copy(src, target_dir)
+
+
+class Dialect:
+    test_db_url: str
+
+    @classmethod
+    def load_env(cls) -> None:
+        if getattr(cls, "test_db_url", None) is None:
+            cls.test_db_url = os.getenv("TEST_DB", "")
+
+    @classmethod
+    def is_postgres(cls) -> bool:
+        cls.load_env()
+        return "postgres" in cls.test_db_url
+
+    @classmethod
+    def is_mysql(cls) -> bool:
+        cls.load_env()
+        return "mysql" in cls.test_db_url
+
+    @classmethod
+    def is_sqlite(cls) -> bool:
+        cls.load_env()
+        return not cls.test_db_url or "sqlite" in cls.test_db_url
+
+
+WINDOWS = platform.system() == "Windows"
+
+
+def run_shell(command: str, capture_output=True, **kw) -> str:
+    if WINDOWS and command.startswith("aerich "):
+        command = "python -m " + command
+    r = subprocess.run(shlex.split(command), capture_output=capture_output)
+    if r.returncode != 0 and r.stderr:
+        return r.stderr.decode()
+    if not r.stdout:
+        return ""
+    return r.stdout.decode()

tests/assets/fake/_tests.py

@@ -0,0 +1,80 @@
+import pytest
+from models import NewModel
+from models_second import Config
+from settings import TORTOISE_ORM
+from tortoise import Tortoise
+from tortoise.exceptions import OperationalError
+
+try:
+    # This error does not translate to tortoise's OperationalError
+    from psycopg.errors import UndefinedColumn
+except ImportError:
+    errors = (OperationalError,)
+else:
+    errors = (OperationalError, UndefinedColumn)
+
+
+@pytest.fixture(scope="session")
+def anyio_backend() -> str:
+    return "asyncio"
+
+
+@pytest.fixture(autouse=True)
+async def init_connections():
+    await Tortoise.init(TORTOISE_ORM)
+    try:
+        yield
+    finally:
+        await Tortoise.close_connections()
+
+
+@pytest.mark.anyio
+async def test_init_db():
+    m1 = await NewModel.filter(name="")
+    assert isinstance(m1, list)
+    m2 = await Config.filter(key="")
+    assert isinstance(m2, list)
+    await NewModel.create(name="")
+    await Config.create(key="", label="", value={})
+
+
+@pytest.mark.anyio
+async def test_fake_field_1():
+    assert "field_1" in NewModel._meta.fields_map
+    assert "field_1" in Config._meta.fields_map
+    with pytest.raises(errors):
+        await NewModel.create(name="", field_1=1)
+    with pytest.raises(errors):
+        await Config.create(key="", label="", value={}, field_1=1)
+
+    obj1 = NewModel(name="", field_1=1)
+    with pytest.raises(errors):
+        await obj1.save()
+    obj1 = NewModel(name="")
+    with pytest.raises(errors):
+        await obj1.save()
+    with pytest.raises(errors):
+        obj1 = await NewModel.first()
+    obj1 = await NewModel.all().first().values("id", "name")
+    assert obj1 and obj1["id"]
+
+    obj2 = Config(key="", label="", value={}, field_1=1)
+    with pytest.raises(errors):
+        await obj2.save()
+    obj2 = Config(key="", label="", value={})
+    with pytest.raises(errors):
+        await obj2.save()
+    with pytest.raises(errors):
+        obj2 = await Config.first()
+    obj2 = await Config.all().first().values("id", "key")
+    assert obj2 and obj2["id"]
+
+
+@pytest.mark.anyio
+async def test_fake_field_2():
+    assert "field_2" in NewModel._meta.fields_map
+    assert "field_2" in Config._meta.fields_map
+    with pytest.raises(errors):
+        await NewModel.create(name="")
+    with pytest.raises(errors):
+        await Config.create(key="", label="", value={})

tests/assets/fake/db.py

@@ -0,0 +1,28 @@
+import asyncclick as click
+from settings import TORTOISE_ORM
+
+from tests._utils import drop_db, init_db
+
+
+@click.group()
+def cli(): ...
+
+
+@cli.command()
+async def create():
+    await init_db(TORTOISE_ORM, False)
+    click.echo(f"Success to create databases for {TORTOISE_ORM['connections']}")
+
+
+@cli.command()
+async def drop():
+    await drop_db(TORTOISE_ORM)
+    click.echo(f"Dropped databases for {TORTOISE_ORM['connections']}")
+
+
+def main():
+    cli()
+
+
+if __name__ == "__main__":
+    main()

tests/assets/fake/settings.py

@@ -0,0 +1,22 @@
+import os
+from datetime import date
+
+from tortoise.contrib.test import MEMORY_SQLITE
+
+DB_URL = (
+    _u.replace("\\{\\}", f"aerich_fake_{date.today():%Y%m%d}")
+    if (_u := os.getenv("TEST_DB"))
+    else MEMORY_SQLITE
+)
+DB_URL_SECOND = (DB_URL + "_second") if DB_URL != MEMORY_SQLITE else MEMORY_SQLITE
+
+TORTOISE_ORM = {
+    "connections": {
+        "default": DB_URL.replace(MEMORY_SQLITE, "sqlite://db.sqlite3"),
+        "second": DB_URL_SECOND.replace(MEMORY_SQLITE, "sqlite://db_second.sqlite3"),
+    },
+    "apps": {
+        "models": {"models": ["models", "aerich.models"], "default_connection": "default"},
+        "models_second": {"models": ["models_second"], "default_connection": "second"},
+    },
+}

tests/assets/sqlite_migrate/_tests.py

@@ -0,0 +1,76 @@
+import uuid
+
+import pytest
+from models import Foo
+from tortoise.exceptions import IntegrityError
+
+
+@pytest.mark.asyncio
+async def test_allow_duplicate() -> None:
+    await Foo.all().delete()
+    await Foo.create(name="foo")
+    obj = await Foo.create(name="foo")
+    assert (await Foo.all().count()) == 2
+    await obj.delete()
+
+
+@pytest.mark.asyncio
+async def test_unique_is_true() -> None:
+    with pytest.raises(IntegrityError):
+        await Foo.create(name="foo")
+        await Foo.create(name="foo")
+
+
+@pytest.mark.asyncio
+async def test_add_unique_field() -> None:
+    if not await Foo.filter(age=0).exists():
+        await Foo.create(name="0_" + uuid.uuid4().hex, age=0)
+    with pytest.raises(IntegrityError):
+        await Foo.create(name=uuid.uuid4().hex, age=0)
+
+
+@pytest.mark.asyncio
+async def test_drop_unique_field() -> None:
+    name = "1_" + uuid.uuid4().hex
+    await Foo.create(name=name, age=0)
+    assert await Foo.filter(name=name).exists()
+
+
+@pytest.mark.asyncio
+async def test_with_age_field() -> None:
+    name = "2_" + uuid.uuid4().hex
+    await Foo.create(name=name, age=0)
+    obj = await Foo.get(name=name)
+    assert obj.age == 0
+
+
+@pytest.mark.asyncio
+async def test_without_age_field() -> None:
+    name = "3_" + uuid.uuid4().hex
+    await Foo.create(name=name, age=0)
+    obj = await Foo.get(name=name)
+    assert getattr(obj, "age", None) is None
+
+
+@pytest.mark.asyncio
+async def test_m2m_with_custom_through() -> None:
+    from models import FooGroup, Group
+
+    name = "4_" + uuid.uuid4().hex
+    foo = await Foo.create(name=name)
+    group = await Group.create(name=name + "1")
+    await FooGroup.all().delete()
+    await foo.groups.add(group)
+    foo_group = await FooGroup.get(foo=foo, group=group)
+    assert not foo_group.is_active
+
+
+@pytest.mark.asyncio
+async def test_add_m2m_field_after_init_db() -> None:
+    from models import Group
+
+    name = "5_" + uuid.uuid4().hex
+    foo = await Foo.create(name=name)
+    group = await Group.create(name=name + "1")
+    await foo.groups.add(group)
+    assert (await group.users.all().first()) == foo

tests/assets/sqlite_migrate/conftest_.py

@@ -0,0 +1,28 @@
+from __future__ import annotations
+
+import asyncio
+from collections.abc import Generator
+
+import pytest
+import pytest_asyncio
+import settings
+from tortoise import Tortoise, connections
+
+
+@pytest.fixture(scope="session")
+def event_loop() -> Generator:
+    policy = asyncio.get_event_loop_policy()
+    res = policy.new_event_loop()
+    asyncio.set_event_loop(res)
+    res._close = res.close  # type:ignore[attr-defined]
+    res.close = lambda: None  # type:ignore[method-assign]
+
+    yield res
+
+    res._close()  # type:ignore[attr-defined]
+
+
+@pytest_asyncio.fixture(scope="session", autouse=True)
+async def api(event_loop, request):
+    await Tortoise.init(config=settings.TORTOISE_ORM)
+    request.addfinalizer(lambda: event_loop.run_until_complete(connections.close_all(discard=True)))

tests/assets/sqlite_migrate/models.py

@@ -0,0 +1,5 @@
+from tortoise import Model, fields
+
+
+class Foo(Model):
+    name = fields.CharField(max_length=60, db_index=False)

tests/assets/sqlite_migrate/settings.py

@@ -0,0 +1,4 @@
+TORTOISE_ORM = {
+    "connections": {"default": "sqlite://db.sqlite3"},
+    "apps": {"models": {"models": ["models", "aerich.models"]}},
+}

tests/indexes.py

@@ -0,0 +1,7 @@
+from tortoise.indexes import Index
+
+
+class CustomIndex(Index):
+    def __init__(self, *args, **kw) -> None:
+        super().__init__(*args, **kw)
+        self._foo = ""

tests/models.py

@@ -1,7 +1,16 @@
+from __future__ import annotations
+
 import datetime
+import uuid
 from enum import IntEnum
 
 from tortoise import Model, fields
+from tortoise.contrib.mysql.indexes import FullTextIndex
+from tortoise.contrib.postgres.indexes import HashIndex
+from tortoise.indexes import Index
+
+from tests._utils import Dialect
+from tests.indexes import CustomIndex
 
 
 class ProductType(IntEnum):
@@ -23,35 +32,110 @@ 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)
+
+    products: fields.ManyToManyRelation[Product]
+
+    class Meta:
+        # reverse indexes elements
+        indexes = [CustomIndex(fields=("is_superuser",)), Index(fields=("username", "is_active"))]
+
+
+class Email(Model):
+    email_id = fields.IntField(primary_key=True)
+    email = fields.CharField(max_length=200, db_index=True)
+    company = fields.CharField(max_length=100, db_index=True, unique=True)
+    is_primary = fields.BooleanField(default=False)
+    address = fields.CharField(max_length=200)
+    users: fields.ManyToManyRelation[User] = fields.ManyToManyField("models.User")
+    config: fields.OneToOneRelation[Config] = fields.OneToOneField("models.Config")
+
+
+def default_name():
+    return uuid.uuid4()
 
 
 class Category(Model):
-    slug = fields.CharField(max_length=200)
-    name = fields.CharField(max_length=200)
-    user = fields.ForeignKeyField("models.User", description="User")
+    slug = fields.CharField(max_length=100)
+    name = fields.CharField(max_length=200, null=True, default=default_name)
+    owner: fields.ForeignKeyRelation[User] = fields.ForeignKeyField(
+        "models.User", description="User"
+    )
+    title = fields.CharField(max_length=20, unique=False)
     created_at = fields.DatetimeField(auto_now_add=True)
 
+    class Meta:
+        if Dialect.is_postgres():
+            indexes = [HashIndex(fields=("slug",))]
+        elif Dialect.is_mysql():
+            indexes = [FullTextIndex(fields=("slug",))]  # type:ignore
+        else:
+            indexes = [Index(fields=("slug",))]  # type:ignore
+
 
 class Product(Model):
-    categories = fields.ManyToManyField("models.Category")
+    id = fields.BigIntField(primary_key=True)
+    categories: fields.ManyToManyRelation[Category] = fields.ManyToManyField(
+        "models.Category", null=False
+    )
+    users: fields.ManyToManyRelation[User] = fields.ManyToManyField(
+        "models.User", related_name="products"
+    )
     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: int = fields.IntEnumField(
+        ProductType, description="Product Type", source_field="type_db_alias"
+    )
+    pic = fields.CharField(max_length=200)
     body = fields.TextField()
+    price = fields.FloatField(null=True)
+    no = fields.UUIDField(db_index=True)
     created_at = fields.DatetimeField(auto_now_add=True)
+    is_deleted = fields.BooleanField(default=False)
+
+    class Meta:
+        unique_together = (("name", "type"),)
+        indexes = (("name", "type"),)
+        managed = True
 
 
 class Config(Model):
+    slug = fields.CharField(primary_key=True, max_length=20)
+    categories: fields.ManyToManyRelation[Category] = fields.ManyToManyField(
+        "models.Category", through="config_category_map", related_name="category_set"
+    )
     label = fields.CharField(max_length=200)
     key = fields.CharField(max_length=20)
-    value = fields.JSONField()
-    status: Status = fields.IntEnumField(Status, default=Status.on)
+    value: dict = fields.JSONField()
+    status: Status = fields.IntEnumField(Status)
+    user: fields.ForeignKeyRelation[User] = fields.ForeignKeyField(
+        "models.User", description="User"
+    )
+
+    email: fields.OneToOneRelation[Email]
+
+    class Meta:
+        managed = True
+
+
+class DontManageMe(Model):
+    name = fields.CharField(max_length=50)
+
+    class Meta:
+        managed = False
+
+
+class Ignore(Model):
+    class Meta:
+        managed = False
+
+
+class NewModel(Model):
+    name = fields.CharField(max_length=50)

tests/models_second.py

@@ -22,7 +22,7 @@ class Status(IntEnum):
 
 
 class User(Model):
-    username = fields.CharField(max_length=20,)
+    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")
@@ -31,19 +31,34 @@ class User(Model):
     intro = fields.TextField(default="")
 
 
+class Email(Model):
+    email = fields.CharField(max_length=200)
+    is_primary = fields.BooleanField(default=False)
+    user: fields.ForeignKeyRelation[User] = fields.ForeignKeyField(
+        "models_second.User", db_constraint=False
+    )
+
+
 class Category(Model):
     slug = fields.CharField(max_length=200)
-    user = fields.ForeignKeyField("diff_models.User", description="User")
+    name = fields.CharField(max_length=200)
+    user: fields.ForeignKeyRelation[User] = fields.ForeignKeyField(
+        "models_second.User", description="User"
+    )
     created_at = fields.DatetimeField(auto_now_add=True)
 
 
 class Product(Model):
-    categories = fields.ManyToManyField("diff_models.Category")
+    categories: fields.ManyToManyRelation[Category] = 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")
+    type: int = 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)
@@ -52,5 +67,5 @@ class Product(Model):
 class Config(Model):
     label = fields.CharField(max_length=200)
     key = fields.CharField(max_length=20)
-    value = fields.JSONField()
+    value: dict = fields.JSONField()
     status: Status = fields.IntEnumField(Status, default=Status.on)

tests/old_models.py

@@ -0,0 +1,129 @@
+import datetime
+from enum import IntEnum
+
+from tortoise import Model, fields
+from tortoise.indexes import Index
+
+from tests.indexes import CustomIndex
+
+
+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 Meta:
+        indexes = [Index(fields=("username", "is_active")), CustomIndex(fields=("is_superuser",))]
+
+
+class Email(Model):
+    email = fields.CharField(max_length=200)
+    company = fields.CharField(max_length=100, db_index=True)
+    is_primary = fields.BooleanField(default=False)
+    user: fields.ForeignKeyRelation[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.ForeignKeyRelation[User] = fields.ForeignKeyField(
+        "models.User", description="User"
+    )
+    title = fields.CharField(max_length=20, unique=True)
+    created_at = fields.DatetimeField(auto_now_add=True)
+
+    class Meta:
+        indexes = [Index(fields=("slug",))]
+
+
+class Product(Model):
+    categories: fields.ManyToManyRelation[Category] = fields.ManyToManyField("models.Category")
+    uid = fields.IntField(source_field="uuid", unique=True)
+    name = fields.CharField(max_length=50)
+    view_num = fields.IntField(description="View Num")
+    sort = fields.IntField()
+    is_review = fields.BooleanField(description="Is Reviewed")
+    type: int = 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)
+    is_delete = fields.BooleanField(default=False)
+
+
+class Config(Model):
+    slug = fields.CharField(primary_key=True, max_length=10)
+    category: fields.ManyToManyRelation[Category] = fields.ManyToManyField("models.Category")
+    categories: fields.ManyToManyRelation[Category] = fields.ManyToManyField(
+        "models.Category", through="config_category_map", related_name="config_set"
+    )
+    name = fields.CharField(max_length=100, unique=True)
+    label = fields.CharField(max_length=200)
+    key = fields.CharField(max_length=20)
+    value: dict = fields.JSONField()
+    status: Status = fields.IntEnumField(Status, default=Status.on)
+
+    class Meta:
+        table = "configs"
+
+
+class DontManageMe(Model):
+    name = fields.CharField(max_length=50)
+
+    class Meta:
+        table = "dont_manage"
+
+
+class Ignore(Model):
+    name = fields.CharField(max_length=50)
+
+    class Meta:
+        managed = True
+
+
+def main() -> None:
+    """Generate a python file for the old_models_describe"""
+    from pathlib import Path
+
+    from tortoise import run_async
+    from tortoise.contrib.test import init_memory_sqlite
+
+    from aerich.utils import get_models_describe
+
+    @init_memory_sqlite
+    async def run() -> None:
+        old_models_describe = get_models_describe("models")
+        p = Path("old_models_describe.py")
+        p.write_text(f"{old_models_describe = }", encoding="utf-8")
+        print(f"Write value to {p}\nYou can reformat it by `ruff format {p}`")
+
+    run_async(run())
+
+
+if __name__ == "__main__":
+    main()

tests/test_command.py

@@ -0,0 +1,11 @@
+from aerich import Command
+from conftest import tortoise_orm
+
+
+async def test_command(mocker):
+    mocker.patch("os.listdir", return_value=[])
+    async with Command(tortoise_orm) as command:
+        history = await command.history()
+        heads = await command.heads()
+    assert history == []
+    assert heads == []

tests/test_ddl.py

@@ -1,35 +1,57 @@
+import tortoise
+
 from aerich.ddl.mysql import MysqlDDL
 from aerich.ddl.postgres import PostgresDDL
 from aerich.ddl.sqlite import SqliteDDL
 from aerich.migrate import Migrate
-from tests.models import Category, User
+from tests.models import Category, Product, User
 
 
 def test_create_table():
     ret = Migrate.ddl.create_table(Category)
     if isinstance(Migrate.ddl, MysqlDDL):
+        if tortoise.__version__ >= "0.24":
             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),
+    `title` VARCHAR(20) NOT NULL,
     `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;"""
+    `owner_id` INT NOT NULL COMMENT 'User',
+    CONSTRAINT `fk_category_user_110d4c63` FOREIGN KEY (`owner_id`) REFERENCES `user` (`id`) ON DELETE CASCADE,
+    FULLTEXT KEY `idx_category_slug_e9bcff` (`slug`)
+) CHARACTER SET utf8mb4"""
+            )
+            return
+        assert (
+            ret
+            == """CREATE TABLE IF NOT EXISTS `category` (
+    `id` INT NOT NULL PRIMARY KEY AUTO_INCREMENT,
+    `slug` VARCHAR(100) NOT NULL,
+    `name` VARCHAR(200),
+    `title` VARCHAR(20) NOT NULL,
+    `created_at` DATETIME(6) NOT NULL DEFAULT CURRENT_TIMESTAMP(6),
+    `owner_id` INT NOT NULL COMMENT 'User',
+    CONSTRAINT `fk_category_user_110d4c63` FOREIGN KEY (`owner_id`) REFERENCES `user` (`id`) ON DELETE CASCADE
+) CHARACTER SET utf8mb4;
+CREATE FULLTEXT INDEX `idx_category_slug_e9bcff` ON `category` (`slug`)"""
         )
 
     elif isinstance(Migrate.ddl, SqliteDDL):
+        exists = "IF NOT EXISTS " if tortoise.__version__ >= "0.24" else ""
         assert (
             ret
-            == """CREATE TABLE IF NOT EXISTS "category" (
+            == f"""CREATE TABLE IF NOT EXISTS "category" (
     "id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
-    "slug" VARCHAR(200) NOT NULL,
-    "name" VARCHAR(200) NOT NULL,
+    "slug" VARCHAR(100) NOT NULL,
+    "name" VARCHAR(200),
+    "title" VARCHAR(20) NOT NULL,
     "created_at" TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
-    "user_id" INT NOT NULL REFERENCES "user" ("id") ON DELETE CASCADE /* User */
-);"""
+    "owner_id" INT NOT NULL REFERENCES "user" ("id") ON DELETE CASCADE /* User */
+);
+CREATE INDEX {exists}"idx_category_slug_e9bcff" ON "category" ("slug")"""
         )
 
     elif isinstance(Migrate.ddl, PostgresDDL):
@@ -37,17 +59,19 @@ def test_create_table():
             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
+    "slug" VARCHAR(100) NOT NULL,
+    "name" VARCHAR(200),
+    "title" VARCHAR(20) NOT NULL,
+    "created_at" TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "owner_id" INT NOT NULL REFERENCES "user" ("id") ON DELETE CASCADE
 );
-COMMENT ON COLUMN "category"."user_id" IS 'User';"""
+CREATE INDEX IF NOT EXISTS "idx_category_slug_e9bcff" ON "category" USING HASH ("slug");
+COMMENT ON COLUMN "category"."owner_id" IS 'User'"""
         )
 
 
 def test_drop_table():
-    ret = Migrate.ddl.drop_table(Category)
+    ret = Migrate.ddl.drop_table(Category._meta.db_table)
     if isinstance(Migrate.ddl, MysqlDDL):
         assert ret == "DROP TABLE IF EXISTS `category`"
     else:
@@ -55,86 +79,98 @@ def test_drop_table():
 
 
 def test_add_column():
-    ret = Migrate.ddl.add_column(Category, Category._meta.fields_map.get("name"))
+    ret = Migrate.ddl.add_column(Category, Category._meta.fields_map["name"].describe(False))
     if isinstance(Migrate.ddl, MysqlDDL):
-        assert ret == "ALTER TABLE `category` ADD `name` VARCHAR(200) NOT NULL"
+        assert ret == "ALTER TABLE `category` ADD `name` VARCHAR(200)"
     else:
-        assert ret == 'ALTER TABLE "category" ADD "name" VARCHAR(200) NOT NULL'
+        assert ret == 'ALTER TABLE "category" ADD "name" VARCHAR(200)'
+    # add unique column
+    ret = Migrate.ddl.add_column(User, User._meta.fields_map["username"].describe(False))
+    if isinstance(Migrate.ddl, MysqlDDL):
+        assert ret == "ALTER TABLE `user` ADD `username` VARCHAR(20) NOT NULL UNIQUE"
+    elif isinstance(Migrate.ddl, PostgresDDL):
+        assert ret == 'ALTER TABLE "user" ADD "username" VARCHAR(20) NOT NULL UNIQUE'
+    else:
+        assert ret == 'ALTER TABLE "user" ADD "username" VARCHAR(20) NOT NULL'
 
 
 def test_modify_column():
-    ret = Migrate.ddl.modify_column(Category, Category._meta.fields_map.get("name"))
-    if isinstance(Migrate.ddl, MysqlDDL):
-        assert ret == "ALTER TABLE `category` MODIFY COLUMN `name` VARCHAR(200) NOT NULL"
-    elif isinstance(Migrate.ddl, PostgresDDL):
-        assert ret == 'ALTER TABLE "category" ALTER COLUMN "name" TYPE VARCHAR(200)'
-    else:
-        assert ret == 'ALTER TABLE "category" MODIFY COLUMN "name" VARCHAR(200) NOT NULL'
+    if isinstance(Migrate.ddl, SqliteDDL):
+        return
 
-    ret = Migrate.ddl.modify_column(User, User._meta.fields_map.get("is_active"))
+    ret0 = Migrate.ddl.modify_column(Category, Category._meta.fields_map["name"].describe(False))
+    ret1 = Migrate.ddl.modify_column(User, User._meta.fields_map["is_active"].describe(False))
     if isinstance(Migrate.ddl, MysqlDDL):
+        assert ret0 == "ALTER TABLE `category` MODIFY COLUMN `name` VARCHAR(200)"
         assert (
-            ret
+            ret1
             == "ALTER TABLE `user` MODIFY COLUMN `is_active` BOOL NOT NULL COMMENT 'Is Active' DEFAULT 1"
         )
     elif isinstance(Migrate.ddl, PostgresDDL):
-        assert ret == 'ALTER TABLE "user" ALTER COLUMN "is_active" TYPE BOOL'
-    else:
         assert (
-            ret
-            == 'ALTER TABLE "user" MODIFY COLUMN "is_active" INT NOT NULL  DEFAULT 1 /* Is Active */'
+            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():
-    ret = Migrate.ddl.alter_column_default(Category, Category._meta.fields_map.get("name"))
+    if isinstance(Migrate.ddl, SqliteDDL):
+        return
+    ret = Migrate.ddl.alter_column_default(User, User._meta.fields_map["intro"].describe(False))
     if isinstance(Migrate.ddl, PostgresDDL):
-        assert ret == 'ALTER TABLE "category" ALTER COLUMN "name" DROP DEFAULT'
-    else:
-        assert ret is None
+        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"))
+    ret = Migrate.ddl.alter_column_default(
+        Category, Category._meta.fields_map["created_at"].describe(False)
+    )
     if isinstance(Migrate.ddl, PostgresDDL):
         assert (
             ret == 'ALTER TABLE "category" ALTER COLUMN "created_at" SET DEFAULT CURRENT_TIMESTAMP'
         )
-    else:
-        assert ret is None
+    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(User, User._meta.fields_map.get("avatar"))
+    ret = Migrate.ddl.alter_column_default(
+        Product, Product._meta.fields_map["view_num"].describe(False)
+    )
     if isinstance(Migrate.ddl, PostgresDDL):
-        assert ret == 'ALTER TABLE "user" ALTER COLUMN "avatar" SET DEFAULT \'\''
-    else:
-        assert ret is None
+        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():
-    ret = Migrate.ddl.alter_column_null(Category, Category._meta.fields_map.get("name"))
+    if isinstance(Migrate.ddl, (SqliteDDL, MysqlDDL)):
+        return
+    ret = Migrate.ddl.alter_column_null(Category, Category._meta.fields_map["name"].describe(False))
     if isinstance(Migrate.ddl, PostgresDDL):
-        assert ret == 'ALTER TABLE "category" ALTER COLUMN "name" SET NOT NULL'
-    else:
-        assert ret is None
+        assert ret == 'ALTER TABLE "category" ALTER COLUMN "name" DROP NOT NULL'
 
 
 def test_set_comment():
-    ret = Migrate.ddl.set_comment(Category, Category._meta.fields_map.get("name"))
-    if isinstance(Migrate.ddl, PostgresDDL):
+    if isinstance(Migrate.ddl, (SqliteDDL, MysqlDDL)):
+        return
+    ret = Migrate.ddl.set_comment(Category, Category._meta.fields_map["name"].describe(False))
     assert ret == 'COMMENT ON COLUMN "category"."name" IS NULL'
-    else:
-        assert ret is None
 
-    ret = Migrate.ddl.set_comment(Category, Category._meta.fields_map.get("user"))
-    if isinstance(Migrate.ddl, PostgresDDL):
-        assert ret == 'COMMENT ON COLUMN "category"."user" IS \'User\''
-    else:
-        assert ret is None
+    ret = Migrate.ddl.set_comment(Category, Category._meta.fields_map["owner"].describe(False))
+    assert ret == 'COMMENT ON COLUMN "category"."owner_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`"
-    else:
+    elif isinstance(Migrate.ddl, PostgresDDL):
         assert ret == 'ALTER TABLE "category" DROP COLUMN "name"'
 
 
@@ -143,43 +179,54 @@ def test_add_index():
     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 `name` (`name`)"
+    elif isinstance(Migrate.ddl, PostgresDDL):
         assert (
-            index_u == "ALTER TABLE `category` ADD UNIQUE INDEX `uid_category_name_8b0cb9` (`name`)"
+            index == 'CREATE INDEX IF NOT EXISTS "idx_category_name_8b0cb9" ON "category" ("name")'
+        )
+        assert (
+            index_u
+            == 'CREATE UNIQUE INDEX IF NOT EXISTS "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")'
-        )
+        assert index == 'CREATE INDEX "idx_category_name_8b0cb9" ON "category" ("name")'
+        assert index_u == 'CREATE UNIQUE INDEX "uid_category_name_8b0cb9" ON "category" ("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 `name`"
     else:
-        assert ret == 'ALTER TABLE "category" DROP INDEX "idx_category_name_8b0cb9"'
+        assert ret == 'DROP INDEX IF EXISTS "idx_category_name_8b0cb9"'
+        assert ret_u == 'DROP INDEX IF EXISTS "uid_category_name_8b0cb9"'
 
 
 def test_add_fk():
-    ret = Migrate.ddl.add_fk(Category, Category._meta.fields_map.get("user"))
+    ret = Migrate.ddl.add_fk(
+        Category, Category._meta.fields_map["owner"].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"
+            == "ALTER TABLE `category` ADD CONSTRAINT `fk_category_user_110d4c63` FOREIGN KEY (`owner_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'
+            == 'ALTER TABLE "category" ADD CONSTRAINT "fk_category_user_110d4c63" FOREIGN KEY ("owner_id") REFERENCES "user" ("id") ON DELETE CASCADE'
         )
 
 
 def test_drop_fk():
-    ret = Migrate.ddl.drop_fk(Category, Category._meta.fields_map.get("user"))
+    ret = Migrate.ddl.drop_fk(
+        Category, Category._meta.fields_map["owner"].describe(False), User.describe(False)
+    )
     if isinstance(Migrate.ddl, MysqlDDL):
-        assert ret == "ALTER TABLE `category` DROP FOREIGN KEY `fk_category_user_e2e3874c`"
+        assert ret == "ALTER TABLE `category` DROP FOREIGN KEY `fk_category_user_110d4c63`"
     elif isinstance(Migrate.ddl, PostgresDDL):
-        assert ret == 'ALTER TABLE "category" DROP CONSTRAINT "fk_category_user_e2e3874c"'
+        assert ret == 'ALTER TABLE "category" DROP CONSTRAINT IF EXISTS "fk_category_user_110d4c63"'
     else:
-        assert ret == 'ALTER TABLE "category" DROP FOREIGN KEY "fk_category_user_e2e3874c"'
+        assert ret == 'ALTER TABLE "category" DROP FOREIGN KEY "fk_category_user_110d4c63"'

tests/test_fake.py

@@ -0,0 +1,106 @@
+from __future__ import annotations
+
+import os
+import re
+from pathlib import Path
+
+from tests._utils import Dialect, run_shell
+
+
+def _append_field(*files: str, name="field_1") -> None:
+    for file in files:
+        p = Path(file)
+        field = f"    {name} = fields.IntField(default=0)"
+        with p.open("a") as f:
+            f.write(os.linesep + field)
+
+
+def test_fake(new_aerich_project):
+    if Dialect.is_sqlite():
+        # TODO: go ahead if sqlite alter-column supported
+        return
+    output = run_shell("aerich init -t settings.TORTOISE_ORM")
+    assert "Success" in output
+    output = run_shell("aerich init-db")
+    assert "Success" in output
+    output = run_shell("aerich --app models_second init-db")
+    assert "Success" in output
+    output = run_shell("pytest _tests.py::test_init_db")
+    assert "error" not in output.lower()
+    _append_field("models.py", "models_second.py")
+    output = run_shell("aerich migrate")
+    assert "Success" in output
+    output = run_shell("aerich --app models_second migrate")
+    assert "Success" in output
+    output = run_shell("aerich upgrade --fake")
+    assert "FAKED" in output
+    output = run_shell("aerich --app models_second upgrade --fake")
+    assert "FAKED" in output
+    output = run_shell("pytest _tests.py::test_fake_field_1")
+    assert "error" not in output.lower()
+    _append_field("models.py", "models_second.py", name="field_2")
+    output = run_shell("aerich migrate")
+    assert "Success" in output
+    output = run_shell("aerich --app models_second migrate")
+    assert "Success" in output
+    output = run_shell("aerich heads")
+    assert "_update.py" in output
+    output = run_shell("aerich upgrade --fake")
+    assert "FAKED" in output
+    output = run_shell("aerich --app models_second upgrade --fake")
+    assert "FAKED" in output
+    output = run_shell("pytest _tests.py::test_fake_field_2")
+    assert "error" not in output.lower()
+    output = run_shell("aerich heads")
+    assert "No available heads." in output
+    output = run_shell("aerich --app models_second heads")
+    assert "No available heads." in output
+    _append_field("models.py", "models_second.py", name="field_3")
+    run_shell("aerich migrate", capture_output=False)
+    run_shell("aerich --app models_second migrate", capture_output=False)
+    run_shell("aerich upgrade --fake", capture_output=False)
+    run_shell("aerich --app models_second upgrade --fake", capture_output=False)
+    output = run_shell("aerich downgrade --fake -v 2 --yes", input="y\n")
+    assert "FAKED" in output
+    output = run_shell("aerich --app models_second downgrade --fake -v 2 --yes", input="y\n")
+    assert "FAKED" in output
+    output = run_shell("aerich heads")
+    assert "No available heads." not in output
+    assert not re.search(r"1_\d+_update\.py", output)
+    assert re.search(r"2_\d+_update\.py", output)
+    output = run_shell("aerich --app models_second heads")
+    assert "No available heads." not in output
+    assert not re.search(r"1_\d+_update\.py", output)
+    assert re.search(r"2_\d+_update\.py", output)
+    output = run_shell("aerich downgrade --fake -v 1 --yes", input="y\n")
+    assert "FAKED" in output
+    output = run_shell("aerich --app models_second downgrade --fake -v 1 --yes", input="y\n")
+    assert "FAKED" in output
+    output = run_shell("aerich heads")
+    assert "No available heads." not in output
+    assert re.search(r"1_\d+_update\.py", output)
+    assert re.search(r"2_\d+_update\.py", output)
+    output = run_shell("aerich --app models_second heads")
+    assert "No available heads." not in output
+    assert re.search(r"1_\d+_update\.py", output)
+    assert re.search(r"2_\d+_update\.py", output)
+    output = run_shell("aerich upgrade --fake")
+    assert "FAKED" in output
+    output = run_shell("aerich --app models_second upgrade --fake")
+    assert "FAKED" in output
+    output = run_shell("aerich heads")
+    assert "No available heads." in output
+    output = run_shell("aerich --app models_second heads")
+    assert "No available heads." in output
+    output = run_shell("aerich downgrade --fake -v 1 --yes", input="y\n")
+    assert "FAKED" in output
+    output = run_shell("aerich --app models_second downgrade --fake -v 1 --yes", input="y\n")
+    assert "FAKED" in output
+    output = run_shell("aerich heads")
+    assert "No available heads." not in output
+    assert re.search(r"1_\d+_update\.py", output)
+    assert re.search(r"2_\d+_update\.py", output)
+    output = run_shell("aerich --app models_second heads")
+    assert "No available heads." not in output
+    assert re.search(r"1_\d+_update\.py", output)
+    assert re.search(r"2_\d+_update\.py", output)

tests/test_inspectdb.py

@@ -0,0 +1,17 @@
+from tests._utils import Dialect, run_shell
+
+
+def test_inspect(new_aerich_project):
+    if Dialect.is_sqlite():
+        # TODO: test sqlite after #384 fixed
+        return
+    run_shell("aerich init -t settings.TORTOISE_ORM")
+    run_shell("aerich init-db")
+    ret = run_shell("aerich inspectdb -t product")
+    assert ret.startswith("from tortoise import Model, fields")
+    assert "primary_key=True" in ret
+    assert "fields.DatetimeField" in ret
+    assert "fields.FloatField" in ret
+    assert "fields.UUIDField" in ret
+    if Dialect.is_mysql():
+        assert "db_index=True" in ret

tests/test_python_m.py

@@ -0,0 +1,18 @@
+import subprocess  # nosec
+from pathlib import Path
+
+from aerich.version import __version__
+from tests._utils import chdir, run_shell
+
+
+def test_python_m_aerich():
+    assert __version__ in run_shell("python -m aerich --version")
+
+
+def test_poetry_add(tmp_path: Path):
+    package = Path(__file__).parent.resolve().parent
+    with chdir(tmp_path):
+        subprocess.run(["poetry", "new", "foo"])  # nosec
+        with chdir("foo"):
+            r = subprocess.run(["poetry", "add", package])  # nosec
+            assert r.returncode == 0

tests/test_sqlite_migrate.py

@@ -0,0 +1,213 @@
+from __future__ import annotations
+
+import contextlib
+import os
+import platform
+import shlex
+import shutil
+import subprocess
+from collections.abc import Generator
+from contextlib import contextmanager
+from pathlib import Path
+
+from tests._utils import Dialect, chdir, copy_files
+
+
+def run_aerich(cmd: str) -> subprocess.CompletedProcess | None:
+    if not cmd.startswith("poetry") and not cmd.startswith("python"):
+        if not cmd.startswith("aerich"):
+            cmd = "aerich " + cmd
+        if platform.system() == "Windows":
+            cmd = "python -m " + cmd
+    r = None
+    with contextlib.suppress(subprocess.TimeoutExpired):
+        r = subprocess.run(shlex.split(cmd), timeout=2)
+    return r
+
+
+def run_shell(cmd: str) -> subprocess.CompletedProcess:
+    envs = dict(os.environ, PYTHONPATH=".")
+    return subprocess.run(shlex.split(cmd), env=envs)
+
+
+def _get_empty_db() -> Path:
+    if (db_file := Path("db.sqlite3")).exists():
+        db_file.unlink()
+    return db_file
+
+
+@contextmanager
+def prepare_sqlite_project(tmp_path: Path) -> Generator[tuple[Path, str]]:
+    test_dir = Path(__file__).parent
+    asset_dir = test_dir / "assets" / "sqlite_migrate"
+    with chdir(tmp_path):
+        files = ("models.py", "settings.py", "_tests.py")
+        copy_files(*(asset_dir / f for f in files), target_dir=Path())
+        models_py, settings_py, test_py = (Path(f) for f in files)
+        copy_files(asset_dir / "conftest_.py", target_dir=Path("conftest.py"))
+        _get_empty_db()
+        yield models_py, models_py.read_text("utf-8")
+
+
+def test_close_tortoise_connections_patch(tmp_path: Path) -> None:
+    if not Dialect.is_sqlite():
+        return
+    with prepare_sqlite_project(tmp_path) as (models_py, models_text):
+        run_aerich("aerich init -t settings.TORTOISE_ORM")
+        r = run_aerich("aerich init-db")
+        assert r is not None
+
+
+def test_sqlite_migrate_alter_indexed_unique(tmp_path: Path) -> None:
+    if not Dialect.is_sqlite():
+        return
+    with prepare_sqlite_project(tmp_path) as (models_py, models_text):
+        models_py.write_text(models_text.replace("db_index=False", "db_index=True"))
+        run_aerich("aerich init -t settings.TORTOISE_ORM")
+        run_aerich("aerich init-db")
+        r = run_shell("pytest -s _tests.py::test_allow_duplicate")
+        assert r.returncode == 0
+        models_py.write_text(models_text.replace("db_index=False", "unique=True"))
+        run_aerich("aerich migrate")  # migrations/models/1_
+        run_aerich("aerich upgrade")
+        r = run_shell("pytest _tests.py::test_unique_is_true")
+        assert r.returncode == 0
+        models_py.write_text(models_text.replace("db_index=False", "db_index=True"))
+        run_aerich("aerich migrate")  # migrations/models/2_
+        run_aerich("aerich upgrade")
+        r = run_shell("pytest -s _tests.py::test_allow_duplicate")
+        assert r.returncode == 0
+
+
+M2M_WITH_CUSTOM_THROUGH = """
+    groups = fields.ManyToManyField("models.Group", through="foo_group")
+
+class Group(Model):
+    name = fields.CharField(max_length=60)
+
+class FooGroup(Model):
+    foo = fields.ForeignKeyField("models.Foo")
+    group = fields.ForeignKeyField("models.Group")
+    is_active = fields.BooleanField(default=False)
+
+    class Meta:
+        table = "foo_group"
+"""
+
+
+def test_sqlite_migrate(tmp_path: Path) -> None:
+    if not Dialect.is_sqlite():
+        return
+    with prepare_sqlite_project(tmp_path) as (models_py, models_text):
+        MODELS = models_text
+        run_aerich("aerich init -t settings.TORTOISE_ORM")
+        config_file = Path("pyproject.toml")
+        modify_time = config_file.stat().st_mtime
+        run_aerich("aerich init-db")
+        run_aerich("aerich init -t settings.TORTOISE_ORM")
+        assert modify_time == config_file.stat().st_mtime
+        r = run_shell("pytest _tests.py::test_allow_duplicate")
+        assert r.returncode == 0
+        # Add index
+        models_py.write_text(MODELS.replace("index=False", "index=True"))
+        run_aerich("aerich migrate")  # migrations/models/1_
+        run_aerich("aerich upgrade")
+        r = run_shell("pytest -s _tests.py::test_allow_duplicate")
+        assert r.returncode == 0
+        # Drop index
+        models_py.write_text(MODELS)
+        run_aerich("aerich migrate")  # migrations/models/2_
+        run_aerich("aerich upgrade")
+        r = run_shell("pytest -s _tests.py::test_allow_duplicate")
+        assert r.returncode == 0
+        # Add unique index
+        models_py.write_text(MODELS.replace("index=False", "index=True, unique=True"))
+        run_aerich("aerich migrate")  # migrations/models/3_
+        run_aerich("aerich upgrade")
+        r = run_shell("pytest _tests.py::test_unique_is_true")
+        assert r.returncode == 0
+        # Drop unique index
+        models_py.write_text(MODELS)
+        run_aerich("aerich migrate")  # migrations/models/4_
+        run_aerich("aerich upgrade")
+        r = run_shell("pytest _tests.py::test_allow_duplicate")
+        assert r.returncode == 0
+        # Add field with unique=True
+        with models_py.open("a") as f:
+            f.write("    age = fields.IntField(unique=True, default=0)")
+        run_aerich("aerich migrate")  # migrations/models/5_
+        run_aerich("aerich upgrade")
+        r = run_shell("pytest _tests.py::test_add_unique_field")
+        assert r.returncode == 0
+        # Drop unique field
+        models_py.write_text(MODELS)
+        run_aerich("aerich migrate")  # migrations/models/6_
+        run_aerich("aerich upgrade")
+        r = run_shell("pytest -s _tests.py::test_drop_unique_field")
+        assert r.returncode == 0
+
+        # Initial with indexed field and then drop it
+        migrations_dir = Path("migrations/models")
+        shutil.rmtree(migrations_dir)
+        db_file = _get_empty_db()
+        models_py.write_text(MODELS + "    age = fields.IntField(db_index=True)")
+        run_aerich("aerich init -t settings.TORTOISE_ORM")
+        run_aerich("aerich init-db")
+        migration_file = list(migrations_dir.glob("0_*.py"))[0]
+        assert "CREATE INDEX" in migration_file.read_text()
+        r = run_shell("pytest _tests.py::test_with_age_field")
+        assert r.returncode == 0
+        models_py.write_text(MODELS)
+        run_aerich("aerich migrate")
+        run_aerich("aerich upgrade")
+        migration_file_1 = list(migrations_dir.glob("1_*.py"))[0]
+        assert "DROP INDEX" in migration_file_1.read_text()
+        r = run_shell("pytest _tests.py::test_without_age_field")
+        assert r.returncode == 0
+
+        # Generate migration file in emptry directory
+        db_file.unlink()
+        run_aerich("aerich init-db")
+        assert not db_file.exists()
+        for p in migrations_dir.glob("*"):
+            if p.is_dir():
+                shutil.rmtree(p)
+            else:
+                p.unlink()
+        run_aerich("aerich init-db")
+        assert db_file.exists()
+
+        # init without '[tool]' section in pyproject.toml
+        config_file = Path("pyproject.toml")
+        config_file.write_text('[project]\nname = "project"')
+        run_aerich("init -t settings.TORTOISE_ORM")
+        assert "[tool.aerich]" in config_file.read_text()
+
+        # add m2m with custom model for through
+        models_py.write_text(MODELS + M2M_WITH_CUSTOM_THROUGH)
+        run_aerich("aerich migrate")
+        run_aerich("aerich upgrade")
+        migration_file_1 = list(migrations_dir.glob("1_*.py"))[0]
+        assert "foo_group" in migration_file_1.read_text()
+        r = run_shell("pytest _tests.py::test_m2m_with_custom_through")
+        assert r.returncode == 0
+
+        # add m2m field after init-db
+        new = """
+    groups = fields.ManyToManyField("models.Group", through="foo_group", related_name="users")
+
+class Group(Model):
+    name = fields.CharField(max_length=60)
+        """
+        _get_empty_db()
+        if migrations_dir.exists():
+            shutil.rmtree(migrations_dir)
+        models_py.write_text(MODELS)
+        run_aerich("aerich init-db")
+        models_py.write_text(MODELS + new)
+        run_aerich("aerich migrate")
+        run_aerich("aerich upgrade")
+        migration_file_1 = list(migrations_dir.glob("1_*.py"))[0]
+        assert "foo_group" in migration_file_1.read_text()
+        r = run_shell("pytest _tests.py::test_add_m2m_field_after_init_db")
+        assert r.returncode == 0

tests/test_utils.py

@@ -0,0 +1,164 @@
+from aerich.utils import get_dict_diff_by_key, import_py_file
+
+
+def test_import_py_file() -> None:
+    m = import_py_file("aerich/utils.py")
+    assert getattr(m, "import_py_file", None)
+
+
+class TestDiffFields:
+    def test_the_same_through_order(self) -> None:
+        old = [
+            {"name": "users", "through": "users_group"},
+            {"name": "admins", "through": "admins_group"},
+        ]
+        new = [
+            {"name": "members", "through": "users_group"},
+            {"name": "admins", "through": "admins_group"},
+        ]
+        diffs = list(get_dict_diff_by_key(old, new))
+        assert type(get_dict_diff_by_key(old, new)).__name__ == "generator"
+        assert len(diffs) == 1
+        assert diffs == [("change", [0, "name"], ("users", "members"))]
+
+    def test_same_through_with_different_orders(self) -> None:
+        old = [
+            {"name": "users", "through": "users_group"},
+            {"name": "admins", "through": "admins_group"},
+        ]
+        new = [
+            {"name": "admins", "through": "admins_group"},
+            {"name": "members", "through": "users_group"},
+        ]
+        diffs = list(get_dict_diff_by_key(old, new))
+        assert len(diffs) == 1
+        assert diffs == [("change", [0, "name"], ("users", "members"))]
+
+    def test_the_same_field_name_order(self) -> None:
+        old = [
+            {"name": "users", "through": "users_group"},
+            {"name": "admins", "through": "admins_group"},
+        ]
+        new = [
+            {"name": "users", "through": "user_groups"},
+            {"name": "admins", "through": "admin_groups"},
+        ]
+        diffs = list(get_dict_diff_by_key(old, new))
+        assert len(diffs) == 4
+        assert diffs == [
+            ("remove", "", [(0, {"name": "users", "through": "users_group"})]),
+            ("remove", "", [(0, {"name": "admins", "through": "admins_group"})]),
+            ("add", "", [(0, {"name": "users", "through": "user_groups"})]),
+            ("add", "", [(0, {"name": "admins", "through": "admin_groups"})]),
+        ]
+
+    def test_same_field_name_with_different_orders(self) -> None:
+        old = [
+            {"name": "admins", "through": "admins_group"},
+            {"name": "users", "through": "users_group"},
+        ]
+        new = [
+            {"name": "users", "through": "user_groups"},
+            {"name": "admins", "through": "admin_groups"},
+        ]
+        diffs = list(get_dict_diff_by_key(old, new))
+        assert len(diffs) == 4
+        assert diffs == [
+            ("remove", "", [(0, {"name": "admins", "through": "admins_group"})]),
+            ("remove", "", [(0, {"name": "users", "through": "users_group"})]),
+            ("add", "", [(0, {"name": "users", "through": "user_groups"})]),
+            ("add", "", [(0, {"name": "admins", "through": "admin_groups"})]),
+        ]
+
+    def test_drop_one(self) -> None:
+        old = [
+            {"name": "users", "through": "users_group"},
+            {"name": "admins", "through": "admins_group"},
+        ]
+        new = [
+            {"name": "admins", "through": "admins_group"},
+        ]
+        diffs = list(get_dict_diff_by_key(old, new))
+        assert len(diffs) == 1
+        assert diffs == [("remove", "", [(0, {"name": "users", "through": "users_group"})])]
+
+    def test_add_one(self) -> None:
+        old = [
+            {"name": "admins", "through": "admins_group"},
+        ]
+        new = [
+            {"name": "users", "through": "users_group"},
+            {"name": "admins", "through": "admins_group"},
+        ]
+        diffs = list(get_dict_diff_by_key(old, new))
+        assert len(diffs) == 1
+        assert diffs == [("add", "", [(0, {"name": "users", "through": "users_group"})])]
+
+    def test_drop_some(self) -> None:
+        old = [
+            {"name": "users", "through": "users_group"},
+            {"name": "admins", "through": "admins_group"},
+            {"name": "staffs", "through": "staffs_group"},
+        ]
+        new = [
+            {"name": "admins", "through": "admins_group"},
+        ]
+        diffs = list(get_dict_diff_by_key(old, new))
+        assert len(diffs) == 2
+        assert diffs == [
+            ("remove", "", [(0, {"name": "users", "through": "users_group"})]),
+            ("remove", "", [(0, {"name": "staffs", "through": "staffs_group"})]),
+        ]
+
+    def test_add_some(self) -> None:
+        old = [
+            {"name": "staffs", "through": "staffs_group"},
+        ]
+        new = [
+            {"name": "users", "through": "users_group"},
+            {"name": "admins", "through": "admins_group"},
+            {"name": "staffs", "through": "staffs_group"},
+        ]
+        diffs = list(get_dict_diff_by_key(old, new))
+        assert len(diffs) == 2
+        assert diffs == [
+            ("add", "", [(0, {"name": "users", "through": "users_group"})]),
+            ("add", "", [(0, {"name": "admins", "through": "admins_group"})]),
+        ]
+
+    def test_some_through_unchanged(self) -> None:
+        old = [
+            {"name": "staffs", "through": "staffs_group"},
+            {"name": "admins", "through": "admins_group"},
+        ]
+        new = [
+            {"name": "users", "through": "users_group"},
+            {"name": "admins_new", "through": "admins_group"},
+            {"name": "staffs_new", "through": "staffs_group"},
+        ]
+        diffs = list(get_dict_diff_by_key(old, new))
+        assert len(diffs) == 3
+        assert diffs == [
+            ("change", [0, "name"], ("staffs", "staffs_new")),
+            ("change", [0, "name"], ("admins", "admins_new")),
+            ("add", "", [(0, {"name": "users", "through": "users_group"})]),
+        ]
+
+    def test_some_unchanged_without_drop_or_add(self) -> None:
+        old = [
+            {"name": "staffs", "through": "staffs_group"},
+            {"name": "admins", "through": "admins_group"},
+            {"name": "users", "through": "users_group"},
+        ]
+        new = [
+            {"name": "users_new", "through": "users_group"},
+            {"name": "admins_new", "through": "admins_group"},
+            {"name": "staffs_new", "through": "staffs_group"},
+        ]
+        diffs = list(get_dict_diff_by_key(old, new))
+        assert len(diffs) == 3
+        assert diffs == [
+            ("change", [0, "name"], ("staffs", "staffs_new")),
+            ("change", [0, "name"], ("admins", "admins_new")),
+            ("change", [0, "name"], ("users", "users_new")),
+        ]