update tortoise-orm version

Fix unique_together
Fix drop table
2021-02-04 20:53:04 +08:00 · 2021-02-04 14:39:07 +08:00 · 2021-02-04 14:23:46 +08:00 · 2021-02-03 22:52:01 +08:00 · 2021-02-03 22:22:22 +08:00 · 2021-02-03 18:06:43 +08:00
38 changed files with 3396 additions and 1417 deletions
--- a/.github/workflows/pypi.yml
+++ b/.github/workflows/pypi.yml
@@ -8,14 +8,17 @@ jobs:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
-      - uses: actions/setup-python@v1
+      - uses: actions/setup-python@v2
        with:
          python-version: '3.x'
+      - name: Install and configure Poetry
+        uses: snok/install-poetry@v1.1.1
+        with:
+          virtualenvs-create: false
      - name: Build dists
-        run: |
-          python3 setup.py sdist
+        run: make build
      - name: Pypi Publish
        uses: pypa/gh-action-pypi-publish@master
        with:
          user: __token__
-          password: ${{ secrets.pypi_password }}
+          password: ${{ secrets.pypi_password }}
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -1,5 +1,5 @@
 name: test
-on: [push, pull_request]
+on: [ push, pull_request ]
 jobs:
  testall:
    runs-on: ubuntu-latest
@@ -19,10 +19,10 @@ jobs:
      - uses: actions/setup-python@v2
        with:
          python-version: '3.x'
-      - name: Install dependencies
-        run: |
-          python -m pip install --upgrade pip
-          pip install -r requirements-dev.txt
+      - name: Install and configure Poetry
+        uses: snok/install-poetry@v1.1.1
+        with:
+          virtualenvs-create: false
      - name: CI
        env:
          MYSQL_PASS: root
@@ -31,4 +31,4 @@ jobs:
          POSTGRES_PASS: 123456
          POSTGRES_HOST: 127.0.0.1
          POSTGRES_PORT: 5432
-        run: make testall
+        run: make ci
--- a/.gitignore
+++ b/.gitignore
@@ -143,4 +143,6 @@ cython_debug/
 .idea
 migrations
 aerich.ini
-src
+src
+.vscode
+.DS_Store
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -0,0 +1,146 @@
+# ChangeLog
+
+## 0.5
+
+### 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.
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,31 +0,0 @@
-=========
-ChangeLog
-=========
-
-0.1
-===
-0.1.5
-----
- Add sqlite and postgres support.
- Fix dependency import.
- Store versions in db.
-
-0.1.4
-----
- Fix transaction and fields import.
- Make unique index worked.
- Add cli --version.
-
-0.1.3
-----
- Support indexes and unique_together.
-
-0.1.2
-----
- Now aerich support m2m.
- Add cli cmd init-db.
- Change cli options.
-
-0.1.1
-----
- Now aerich is basic worked.
--- a/214
+++ b/214
@@ -1,21 +1,201 @@
-The MIT License (MIT)
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--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,3 +0,0 @@
-include LICENSE
-include README.rst
-include requirements.txt
--- a/34
+++ b/34
@@ -1,10 +1,12 @@
-checkfiles = aerich/ tests/
+checkfiles = aerich/ tests/ conftest.py
 black_opts = -l 100 -t py38
 py_warn = PYTHONDEVMODE=1
 MYSQL_HOST ?= "127.0.0.1"
 MYSQL_PORT ?= 3306
+MYSQL_PASS ?= "123456"
 POSTGRES_HOST ?= "127.0.0.1"
 POSTGRES_PORT ?= 5432
+POSTGRES_PASS ?= "123456"

 help:
 	@echo "Aerich development makefile"
@@ -12,29 +14,26 @@ help:
 	@echo  "usage: make <target>"
 	@echo  "Targets:"
 	@echo  "    up			Updates dev/test dependencies"
-	@echo  "    deps        Ensure dev/test dependencies are installed"
+	@echo  "    deps		Ensure dev/test dependencies are installed"
 	@echo  "    check		Checks that build is sane"
 	@echo  "    lint		Reports all linter violations"
 	@echo  "    test		Runs all tests"
 	@echo  "    style		Auto-formats the code"

+up:
+	@poetry update
+
 deps:
-	@which pip-sync > /dev/null || pip install -q pip-tools
-	@pip install -r requirements-dev.txt
+	@poetry install -E dbdrivers

 style: deps
-	isort -rc $(checkfiles)
+	isort -src $(checkfiles)
 	black $(black_opts) $(checkfiles)

 check: deps
-ifneq ($(shell which black),)
 	black --check $(black_opts) $(checkfiles) || (echo "Please run 'make style' to auto-fix style issues" && false)
-endif
 	flake8 $(checkfiles)
-	mypy $(checkfiles)
-	pylint -d C,W,R $(checkfiles)
-	bandit -r $(checkfiles)
-	python setup.py check -mrs
+	bandit -x tests -r $(checkfiles)

 test: deps
 	$(py_warn) TEST_DB=sqlite://:memory: py.test
@@ -43,17 +42,14 @@ test_sqlite:
 	$(py_warn) TEST_DB=sqlite://:memory: py.test

 test_mysql:
-	$(py_warn) TEST_DB="mysql://root:$(MYSQL_PASS)@$(MYSQL_HOST):$(MYSQL_PORT)/test_\{\}" py.test
+	$(py_warn) TEST_DB="mysql://root:$(MYSQL_PASS)@$(MYSQL_HOST):$(MYSQL_PORT)/test_\{\}" pytest -vv -s

 test_postgres:
-	$(py_warn) TEST_DB="postgres://postgres:$(POSTGRES_PASS)@$(POSTGRES_HOST):$(POSTGRES_PORT)/test_\{\}" py.test
+	$(py_warn) TEST_DB="postgres://postgres:$(POSTGRES_PASS)@$(POSTGRES_HOST):$(POSTGRES_PORT)/test_\{\}" pytest -vv -s

 testall: deps test_sqlite test_postgres test_mysql

-publish: deps
-	rm -fR dist/
-	python setup.py sdist
-	twine upload dist/*
+build: deps
+	@poetry build

-ci:
-	@act -P ubuntu-latest=nektos/act-environments-ubuntu:18.04 -b
+ci: check testall
--- a/README.md
+++ b/README.md
@@ -0,0 +1,225 @@
+# 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)
+
+## Introduction
+
+Aerich is a database migrations tool for Tortoise-ORM, which like alembic for SQLAlchemy, or Django ORM with it\'s own
+migrations solution.
+
+~~**Important: You can only use absolutely import in your `models.py` to make `aerich` work.**~~
+
+From version `v0.5.0`, there is no such limitation now.
+
+## Install
+
+Just install from pypi:
+
+```shell
+> pip install aerich
+```
+
+## Quick Start
+
+```shell
+> aerich -h
+
+Usage: aerich [OPTIONS] COMMAND [ARGS]...
+
+Options:
+  -c, --config TEXT  Config file.  [default: aerich.ini]
+  --app TEXT         Tortoise-ORM app name.  [default: models]
+  -n, --name TEXT    Name of section in .ini file to use for aerich config.
+                     [default: aerich]
+  -h, --help         Show this message and exit.
+
+Commands:
+  downgrade  Downgrade to 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.
+```
+
+## Usage
+
+You need add `aerich.models` to your `Tortoise-ORM` config first, example:
+
+```python
+TORTOISE_ORM = {
+    "connections": {"default": "mysql://root:123456@127.0.0.1:3306/test"},
+    "apps": {
+        "models": {
+            "models": ["tests.models", "aerich.models"],
+            "default_connection": "default",
+        },
+    },
+}
+```
+
+### Initialization
+
+```shell
+> aerich init -h
+
+Usage: aerich init [OPTIONS]
+
+  Init config file and generate root migrate location.
+
+Options:
+  -t, --tortoise-orm TEXT  Tortoise-ORM config module dict variable, like settings.TORTOISE_ORM.
+                           [required]
+  --location TEXT          Migrate store location.  [default: ./migrations]
+  -h, --help               Show this message and exit.
+```
+
+Init config file and location:
+
+```shell
+> aerich init -t tests.backends.mysql.TORTOISE_ORM
+
+Success create migrate location ./migrations
+Success generate config file aerich.ini
+```
+
+### Init db
+
+```shell
+> aerich init-db
+
+Success create app migrate location ./migrations/models
+Success generate schema for app "models"
+```
+
+If your Tortoise-ORM app is not default `models`, you must specify
+`--app` like `aerich --app other_models init-db`.
+
+### Update models and make migrate
+
+```shell
+> aerich migrate --name drop_column
+
+Success migrate 1_202029051520102929_drop_column.sql
+```
+
+Format of migrate filename is
+`{version_num}_{datetime}_{name|update}.sql`.
+
+And if `aerich` guess you are renaming a column, it will ask `Rename {old_column} to {new_column} [True]`, you can
+choice `True` to rename column without column drop, or choice `False` to drop column then create, note that the after
+maybe lose data.
+
+### Upgrade to latest version
+
+```shell
+> aerich upgrade
+
+Success upgrade 1_202029051520102929_drop_column.sql
+```
+
+Now your db is migrated to latest.
+
+### Downgrade to specified version
+
+```shell
+> aerich init -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.sql
+```
+
+Now your db rollback to specified version.
+
+### Show history
+
+```shell
+> aerich history
+
+1_202029051520102929_drop_column.sql
+```
+
+### Show heads to be migrated
+
+```shell
+> aerich heads
+
+1_202029051520102929_drop_column.sql
+```
+
+### Inspect db tables to TortoiseORM model
+
+Currently, only support MySQL.
+
+```shell
+Usage: aerich inspectdb [OPTIONS]
+
+  Introspects the database tables to standard output as TortoiseORM model.
+
+Options:
+  -t, --table TEXT  Which tables to inspect.
+  -h, --help        Show this message and exit.
+```
+
+Inspect all tables and print to console:
+
+```shell
+aerich --app models inspectdb
+```
+
+Inspect a specified table in default app and redirect to `models.py`:
+
+```shell
+aerich inspectdb -t user > models.py
+```
+
+Note that this command is restricted, which is not supported in some solutions, such as `IntEnumField`
+and `ForeignKeyField` and so on.
+
+### Multiple databases
+
+```python
+tortoise_orm = {
+    "connections": {
+        "default": expand_db_url(db_url, True),
+        "second": expand_db_url(db_url_second, True),
+    },
+    "apps": {
+        "models": {"models": ["tests.models", "aerich.models"], "default_connection": "default"},
+        "models_second": {"models": ["tests.models_second"], "default_connection": "second", },
+    },
+}
+```
+
+You need only specify `aerich.models` in one app, and must specify `--app` when run `aerich migrate` and so on.
+
+## Support this project
+
+| AliPay                                                                                 | WeChatPay                                                                                 | PayPal                                                           |
+| -------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------- | ---------------------------------------------------------------- |
+| <img width="200" src="https://github.com/long2ice/aerich/raw/dev/images/alipay.jpeg"/> | <img width="200" src="https://github.com/long2ice/aerich/raw/dev/images/wechatpay.jpeg"/> | [PayPal](https://www.paypal.me/long2ice) to my account long2ice. |
+
+## License
+
+This project is licensed under the
+[Apache-2.0](https://github.com/long2ice/aerich/blob/master/LICENSE) License.
--- a/README.rst
+++ b/README.rst
@@ -1,160 +0,0 @@
-======
-Aerich
-======
-
-.. image:: https://img.shields.io/pypi/v/aerich.svg?style=flat
-   :target: https://pypi.python.org/pypi/aerich
-.. image:: https://img.shields.io/github/license/long2ice/aerich
-   :target: https://github.com/long2ice/aerich
-.. image:: https://github.com/long2ice/aerich/workflows/pypi/badge.svg
-   :target: https://github.com/long2ice/aerich/actions?query=workflow:pypi
-.. image:: https://github.com/long2ice/aerich/workflows/test/badge.svg
-   :target: https://github.com/long2ice/aerich/actions?query=workflow:test
-
-Introduction
-============
-
-Tortoise-ORM is the best asyncio ORM now, but it lacks a database migrations tool like alembic for SQLAlchemy, or Django ORM with it's own migrations tool.
-
-This project aim to be a best migrations tool for Tortoise-ORM and which written by one of contributors of Tortoise-ORM.
-
-Install
-=======
-
-Just install from pypi:
-
-.. code-block:: shell
-
-    $ pip install aerich
-
-Quick Start
-===========
-
-.. code-block:: shell
-
-    $ aerich -h
-
-    Usage: aerich [OPTIONS] COMMAND [ARGS]...
-
-    Options:
-      -c, --config TEXT  Config file.  [default: aerich.ini]
-      --app TEXT         Tortoise-ORM app name.  [default: models]
-      -n, --name TEXT    Name of section in .ini file to use for aerich config.
-                         [default: aerich]
-      -h, --help         Show this message and exit.
-
-    Commands:
-      downgrade  Downgrade to previous version.
-      heads      Show current available heads in migrate location.
-      history    List all migrate items.
-      init       Init config file and generate root migrate location.
-      init-db    Generate schema and generate app migrate location.
-      migrate    Generate migrate changes file.
-      upgrade    Upgrade to latest version.
-
-Usage
-=====
-You need add ``aerich.models`` to your ``Tortoise-ORM`` config first, example:
-
-.. code-block:: python
-
-    TORTOISE_ORM = {
-        "connections": {"default": "mysql://root:123456@127.0.0.1:3306/test"},
-        "apps": {
-            "models": {
-                "models": ["tests.models", "aerich.models"],
-                "default_connection": "default",
-            },
-        },
-    }
-
-Initialization
--------------
-
-.. code-block:: shell
-
-    $ aerich init -h
-
-    Usage: aerich init [OPTIONS]
-
-      Init config file and generate root migrate location.
-
-    Options:
-      -t, --tortoise-orm TEXT  Tortoise-ORM config module dict variable, like settings.TORTOISE_ORM.
-                               [required]
-      --location TEXT          Migrate store location.  [default: ./migrations]
-      -h, --help               Show this message and exit.
-
-Init config file and location:
-
-.. code-block:: shell
-
-    $ aerich init -t tests.backends.mysql.TORTOISE_ORM
-
-    Success create migrate location ./migrations
-    Success generate config file aerich.ini
-
-Init db
-------
-
-.. code-block:: shell
-
-    $ aerich init-db
-
-    Success create app migrate location ./migrations/models
-    Success generate schema for app "models"
-
-Update models and make migrate
------------------------------
-
-.. code-block:: shell
-
-    $ aerich migrate --name drop_column
-
-    Success migrate 1_202029051520102929_drop_column.json
-
-Format of migrate filename is ``{version_num}_{datetime}_{name|update}.json``
-
-Upgrade to latest version
-------------------------
-
-.. code-block:: shell
-
-    $ aerich upgrade
-
-    Success upgrade 1_202029051520102929_drop_column.json
-
-Now your db is migrated to latest.
-
-Downgrade to previous version
-----------------------------
-
-.. code-block:: shell
-
-    $ aerich downgrade
-
-    Success downgrade 1_202029051520102929_drop_column.json
-
-Now your db rollback to previous version.
-
-Show history
------------
-
-.. code-block:: shell
-
-    $ aerich history
-
-    1_202029051520102929_drop_column.json
-
-Show heads to be migrated
-------------------------
-
-.. code-block:: shell
-
-    $ aerich heads
-
-    1_202029051520102929_drop_column.json
-
-License
-=======
-This project is licensed under the `MIT <https://github.com/long2ice/aerich/blob/master/LICENSE>`_ License.
--- a/aerich/init.py
+++ b/aerich/init.py
@@ -1 +1 @@
-__version__ = "0.1.4"
+__version__ = "0.5.0"
--- a/aerich/cli.py
+++ b/aerich/cli.py
@@ -1,36 +1,55 @@
-import json
+import asyncio
 import os
 import sys
 from configparser import ConfigParser
-from enum import Enum
+from functools import wraps
+from pathlib import Path
+from typing import List

-import asyncclick as click
-from asyncclick import Context, UsageError
-from tortoise import ConfigurationError, Tortoise, generate_schema_for_client
+import click
+from click 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.inspectdb import InspectDb
 from aerich.migrate import Migrate
-from aerich.utils import get_app_connection, get_app_connection_name, get_tortoise_config
+from aerich.utils import (
+    get_app_connection,
+    get_app_connection_name,
+    get_models_describe,
+    get_tortoise_config,
+    get_version_content_from_file,
+    write_version_file,
+)

 from . import __version__
+from .enums import Color
 from .models import Aerich

-
-class Color(str, Enum):
-    green = "green"
-    red = "red"
-    yellow = "yellow"
-
-
 parser = ConfigParser()


+def coro(f):
+    @wraps(f)
+    def wrapper(*args, **kwargs):
+        loop = asyncio.get_event_loop()
+        loop.run_until_complete(f(*args, **kwargs))
+
+    return wrapper
+
+
@click.group(context_settings={"help_option_names": ["-h", "--help"]})
-@click.version_option(__version__)
+@click.version_option(__version__, "-V", "--version")
@click.option(
-    "-c", "--config", default="aerich.ini", show_default=True, help="Config file.",
+    "-c",
+    "--config",
+    default="aerich.ini",
+    show_default=True,
+    help="Config file.",
 )
-@click.option("--app", default="models", show_default=True, help="Tortoise-ORM app name.")
+@click.option("--app", required=False, help="Tortoise-ORM app name.")
@click.option(
    "-n",
    "--name",
@@ -39,15 +58,15 @@ parser = ConfigParser()
    help="Name of section in .ini file to use for aerich config.",
 )
@click.pass_context
+@coro
 async def cli(ctx: Context, config, app, name):
    ctx.ensure_object(dict)
    ctx.obj["config_file"] = config
    ctx.obj["name"] = name
-    ctx.obj["app"] = app

    invoked_subcommand = ctx.invoked_subcommand
    if invoked_subcommand != "init":
-        if not os.path.exists(config):
+        if not Path(config).exists():
            raise UsageError("You must exec init first", ctx=ctx)
        parser.read(config)

@@ -55,76 +74,113 @@ async def cli(ctx: Context, config, app, name):
        tortoise_orm = parser[name]["tortoise_orm"]

        tortoise_config = get_tortoise_config(ctx, tortoise_orm)
-
+        app = app or list(tortoise_config.get("apps").keys())[0]
        ctx.obj["config"] = tortoise_config
        ctx.obj["location"] = location
-
+        ctx.obj["app"] = app
+        Migrate.app = app
        if invoked_subcommand != "init-db":
-            try:
-                await Migrate.init_with_old_models(tortoise_config, app, location)
-            except ConfigurationError:
-                raise UsageError(ctx=ctx, message="You must exec init-db first")
+            if not Path(location, app).exists():
+                raise UsageError("You must exec init-db first", ctx=ctx)
+            await Migrate.init(tortoise_config, app, location)


@cli.command(help="Generate migrate changes file.")
@click.option("--name", default="update", show_default=True, help="Migrate name.")
@click.pass_context
+@coro
 async def migrate(ctx: Context, name):
-    config = ctx.obj["config"]
-    location = ctx.obj["location"]
-    app = ctx.obj["app"]
-
    ret = await Migrate.migrate(name)
    if not ret:
        return click.secho("No changes detected", fg=Color.yellow)
-    Migrate.write_old_models(config, app, location)
    click.secho(f"Success migrate {ret}", fg=Color.green)


-@cli.command(help="Upgrade to latest version.")
+@cli.command(help="Upgrade to specified version.")
@click.pass_context
+@coro
 async def upgrade(ctx: Context):
    config = ctx.obj["config"]
    app = ctx.obj["app"]
    migrated = False
-    for version in Migrate.get_all_version_files():
-        if not await Aerich.exists(version=version, app=app):
+    for version_file in Migrate.get_all_version_files():
+        try:
+            exists = await Aerich.exists(version=version_file, 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") as f:
-                    content = json.load(f)
-                    upgrade_query_list = content.get("upgrade")
-                    for upgrade_query in upgrade_query_list:
-                        await conn.execute_query(upgrade_query)
-            await Aerich.create(version=version, app=app)
-            click.secho(f"Success upgrade {version}", fg=Color.green)
+                file_path = Path(Migrate.migrate_location, version_file)
+                content = get_version_content_from_file(file_path)
+                upgrade_query_list = content.get("upgrade")
+                for upgrade_query in upgrade_query_list:
+                    await conn.execute_script(upgrade_query)
+                await Aerich.create(
+                    version=version_file,
+                    app=app,
+                    content=get_models_describe(app),
+                )
+            click.secho(f"Success upgrade {version_file}", fg=Color.green)
            migrated = True
    if not migrated:
-        click.secho("No migrate items", fg=Color.yellow)
+        click.secho("No upgrade items found", fg=Color.yellow)


-@cli.command(help="Downgrade to previous version.")
+@cli.command(help="Downgrade to specified version.")
+@click.option(
+    "-v",
+    "--version",
+    default=-1,
+    type=int,
+    show_default=True,
+    help="Specified version, default to last.",
+)
+@click.option(
+    "-d",
+    "--delete",
+    is_flag=True,
+    default=False,
+    show_default=True,
+    help="Delete version files at the same time.",
+)
@click.pass_context
-async def downgrade(ctx: Context):
+@click.confirmation_option(
+    prompt="Downgrade is dangerous, which maybe lose your data, are you sure?",
+)
+@coro
+async def downgrade(ctx: Context, version: int, delete: bool):
    app = ctx.obj["app"]
    config = ctx.obj["config"]
-    last_version = await Migrate.get_last_version()
-    if not last_version:
-        return click.secho("No last version found", fg=Color.yellow)
-    file = last_version.version
-    async with in_transaction(get_app_connection_name(config, app)) as conn:
-        file_path = os.path.join(Migrate.migrate_location, file)
-        with open(file_path, "r") as f:
-            content = json.load(f)
+    if version == -1:
+        specified_version = await Migrate.get_last_version()
+    else:
+        specified_version = await Aerich.filter(app=app, version__startswith=f"{version}_").first()
+    if not specified_version:
+        return click.secho("No specified version found", fg=Color.yellow)
+    if version == -1:
+        versions = [specified_version]
+    else:
+        versions = await Aerich.filter(app=app, pk__gte=specified_version.pk)
+    for version in versions:
+        file = version.version
+        async with in_transaction(get_app_connection_name(config, app)) as conn:
+            file_path = Path(Migrate.migrate_location, file)
+            content = get_version_content_from_file(file_path)
            downgrade_query_list = content.get("downgrade")
+            if not downgrade_query_list:
+                click.secho("No downgrade items found", fg=Color.yellow)
+                return
            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)
+            await version.delete()
+            if delete:
+                os.unlink(file_path)
+            click.secho(f"Success downgrade {file}", fg=Color.green)


@cli.command(help="Show current available heads in migrate location.")
@click.pass_context
+@coro
 async def heads(ctx: Context):
    app = ctx.obj["app"]
    versions = Migrate.get_all_version_files()
@@ -134,12 +190,13 @@ async def heads(ctx: Context):
            click.secho(version, fg=Color.green)
            is_heads = True
    if not is_heads:
-        click.secho("No available heads,try migrate", fg=Color.green)
+        click.secho("No available heads,try migrate first", fg=Color.green)


@cli.command(help="List all migrate items.")
@click.pass_context
-def history(ctx):
+@coro
+async def history(ctx: Context):
    versions = Migrate.get_all_version_files()
    for version in versions:
        click.secho(version, fg=Color.green)
@@ -155,26 +212,31 @@ def history(ctx):
    help="Tortoise-ORM config module dict variable, like settings.TORTOISE_ORM.",
 )
@click.option(
-    "--location", default="./migrations", show_default=True, help="Migrate store location."
+    "--location",
+    default="./migrations",
+    show_default=True,
+    help="Migrate store location.",
 )
@click.pass_context
+@coro
 async def init(
-    ctx: Context, tortoise_orm, location,
+    ctx: Context,
+    tortoise_orm,
+    location,
 ):
    config_file = ctx.obj["config_file"]
    name = ctx.obj["name"]
-    if os.path.exists(config_file):
+    if Path(config_file).exists():
        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)

-    with open(config_file, "w") as f:
+    with open(config_file, "w", encoding="utf-8") as f:
        parser.write(f)

-    if not os.path.isdir(location):
-        os.mkdir(location)
+    Path(location).mkdir(parents=True, exist_ok=True)

    click.secho(f"Success create migrate location {location}", fg=Color.green)
    click.secho(f"Success generate config file {config_file}", fg=Color.green)
@@ -183,31 +245,69 @@ async def init(
@cli.command(help="Generate schema and generate app migrate location.")
@click.option(
    "--safe",
-    is_flag=True,
+    type=bool,
    default=True,
    help="When set to true, creates the table only when it does not already exist.",
    show_default=True,
 )
@click.pass_context
+@coro
 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)
+    dirname = Path(location, app)
+    try:
+        dirname.mkdir(parents=True)
        click.secho(f"Success create app migrate location {dirname}", fg=Color.green)
-
-    Migrate.write_old_models(config, app, location)
+    except FileExistsError:
+        return click.secho(
+            f"Inited {app} already, or delete {dirname} and try again.", fg=Color.yellow
+        )

    await Tortoise.init(config=config)
    connection = get_app_connection(config, app)
    await generate_schema_for_client(connection, safe)

-    return click.secho(f'Success generate schema for app "{app}"', fg=Color.green)
+    schema = get_schema_sql(connection, safe)
+
+    version = await Migrate.generate_version()
+    await Aerich.create(
+        version=version,
+        app=app,
+        content=get_models_describe(app),
+    )
+    content = {
+        "upgrade": [schema],
+    }
+    write_version_file(Path(dirname, version), content)
+    click.secho(f'Success generate schema for app "{app}"', fg=Color.green)
+
+
+@cli.command(help="Introspects the database tables to standard output as TortoiseORM model.")
+@click.option(
+    "-t",
+    "--table",
+    help="Which tables to inspect.",
+    multiple=True,
+    required=False,
+)
+@click.pass_context
+@coro
+async def inspectdb(ctx: Context, table: List[str]):
+    config = ctx.obj["config"]
+    app = ctx.obj["app"]
+    connection = get_app_connection(config, app)
+
+    inspect = InspectDb(connection, table)
+    await inspect.inspect()


 def main():
    sys.path.insert(0, ".")
-    cli(_anyio_backend="asyncio")
+    cli()
+
+
+if __name__ == "__main__":
+    main()
--- a/aerich/ddl/init.py
+++ b/aerich/ddl/init.py
@@ -1,23 +1,31 @@
+from enum import Enum
 from typing import List, Type

-from tortoise import BaseDBAsyncClient, ForeignKeyFieldInstance, ManyToManyFieldInstance, Model
+from tortoise import BaseDBAsyncClient, Model
 from tortoise.backends.base.schema_generator import BaseSchemaGenerator
-from tortoise.fields import Field, JSONField, TextField, UUIDField


 class BaseDDL:
    schema_generator_cls: Type[BaseSchemaGenerator] = BaseSchemaGenerator
    DIALECT = "sql"
-    _DROP_TABLE_TEMPLATE = "DROP TABLE IF EXISTS {table_name}"
-    _ADD_COLUMN_TEMPLATE = "ALTER TABLE {table_name} ADD {column}"
-    _DROP_COLUMN_TEMPLATE = "ALTER TABLE {table_name} DROP COLUMN {column_name}"
-    _ADD_INDEX_TEMPLATE = (
-        "ALTER TABLE {table_name} ADD {unique} INDEX {index_name} ({column_names})"
+    _DROP_TABLE_TEMPLATE = 'DROP TABLE IF EXISTS "{table_name}"'
+    _ADD_COLUMN_TEMPLATE = 'ALTER TABLE "{table_name}" ADD {column}'
+    _DROP_COLUMN_TEMPLATE = 'ALTER TABLE "{table_name}" DROP COLUMN "{column_name}"'
+    _ALTER_DEFAULT_TEMPLATE = 'ALTER TABLE "{table_name}" ALTER COLUMN "{column}" {default}'
+    _RENAME_COLUMN_TEMPLATE = (
+        'ALTER TABLE "{table_name}" RENAME COLUMN "{old_column_name}" TO "{new_column_name}"'
+    )
+    _ADD_INDEX_TEMPLATE = (
+        'ALTER TABLE "{table_name}" ADD {unique}INDEX "{index_name}" ({column_names})'
+    )
+    _DROP_INDEX_TEMPLATE = 'ALTER TABLE "{table_name}" DROP INDEX "{index_name}"'
+    _ADD_FK_TEMPLATE = 'ALTER TABLE "{table_name}" ADD CONSTRAINT "{fk_name}" FOREIGN KEY ("{db_column}") REFERENCES "{table}" ("{field}") ON DELETE {on_delete}'
+    _DROP_FK_TEMPLATE = 'ALTER TABLE "{table_name}" DROP FOREIGN KEY "{fk_name}"'
+    _M2M_TABLE_TEMPLATE = 'CREATE TABLE "{table_name}" ("{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 {on_delete}){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}'
    )
-    _DROP_INDEX_TEMPLATE = "ALTER TABLE {table_name} DROP INDEX {index_name}"
-    _ADD_FK_TEMPLATE = "ALTER TABLE {table_name} ADD CONSTRAINT `{fk_name}` FOREIGN KEY (`{db_column}`) REFERENCES `{table}` (`{field}`) ON DELETE {on_delete}"
-    _DROP_FK_TEMPLATE = "ALTER TABLE {table_name} DROP FOREIGN KEY {fk_name}"
-    _M2M_TABLE_TEMPLATE = "CREATE TABLE {table_name} ({backward_key} {backward_type} NOT NULL REFERENCES {backward_table} ({backward_field}) ON DELETE CASCADE,{forward_key} {forward_type} NOT NULL REFERENCES {forward_table} ({forward_field}) ON DELETE CASCADE){extra}{comment};"

    def __init__(self, client: "BaseDBAsyncClient"):
        self.client = client
@@ -26,42 +34,50 @@ class BaseDDL:
    def create_table(self, model: "Type[Model]"):
        return self.schema_generator._get_table_sql(model, True)["table_creation_string"]

-    def drop_table(self, model: "Type[Model]"):
-        return self._DROP_TABLE_TEMPLATE.format(table_name=model._meta.db_table)
+    def drop_table(self, table_name: str):
+        return self._DROP_TABLE_TEMPLATE.format(table_name=table_name)

-    def create_m2m_table(self, model: "Type[Model]", field: ManyToManyFieldInstance):
+    def create_m2m(
+        self, model: "Type[Model]", field_describe: dict, reference_table_describe: dict
+    ):
+        through = field_describe.get("through")
+        description = field_describe.get("description")
+        reference_id = reference_table_describe.get("pk_field").get("db_column")
+        db_field_types = reference_table_describe.get("pk_field").get("db_field_types")
        return self._M2M_TABLE_TEMPLATE.format(
-            table_name=field.through,
+            table_name=through,
            backward_table=model._meta.db_table,
-            forward_table=field.related_model._meta.db_table,
+            forward_table=reference_table_describe.get("table"),
            backward_field=model._meta.db_pk_column,
-            forward_field=field.related_model._meta.db_pk_column,
-            backward_key=field.backward_key,
+            forward_field=reference_id,
+            backward_key=field_describe.get("backward_key"),
            backward_type=model._meta.pk.get_for_dialect(self.DIALECT, "SQL_TYPE"),
-            forward_key=field.forward_key,
-            forward_type=field.related_model._meta.pk.get_for_dialect(self.DIALECT, "SQL_TYPE"),
-            extra=self.schema_generator._table_generate_extra(table=field.through),
+            forward_key=field_describe.get("forward_key"),
+            forward_type=db_field_types.get(self.DIALECT) or db_field_types.get(""),
+            on_delete=field_describe.get("on_delete"),
+            extra=self.schema_generator._table_generate_extra(table=through),
            comment=self.schema_generator._table_comment_generator(
-                table=field.through, comment=field.description
+                table=through, comment=description
            )
-            if field.description
+            if description
            else "",
        )

-    def drop_m2m(self, field: ManyToManyFieldInstance):
-        return self._DROP_TABLE_TEMPLATE.format(table_name=field.through)
+    def drop_m2m(self, table_name: str):
+        return self._DROP_TABLE_TEMPLATE.format(table_name=table_name)

-    def add_column(self, model: "Type[Model]", field_object: Field):
+    def _get_default(self, model: "Type[Model]", field_describe: dict):
        db_table = model._meta.db_table
-        default = field_object.default
-        db_column = field_object.model_field_name
-        auto_now_add = getattr(field_object, "auto_now_add", False)
-        auto_now = getattr(field_object, "auto_now", False)
+        default = field_describe.get("default")
+        if isinstance(default, Enum):
+            default = default.value
+        db_column = field_describe.get("db_column")
+        auto_now_add = field_describe.get("auto_now_add", False)
+        auto_now = field_describe.get("auto_now", False)
        if default is not None or auto_now_add:
-            if callable(default) or isinstance(field_object, (UUIDField, TextField, JSONField)):
+            if field_describe.get("field_type") in ["UUIDField", "TextField", "JSONField"]:
                default = ""
            else:
-                default = field_object.to_db_value(default, model)
                try:
                    default = self.schema_generator._column_default_generator(
                        db_table,
@@ -73,22 +89,32 @@ class BaseDDL:
                except NotImplementedError:
                    default = ""
        else:
+            default = None
+        return default
+
+    def add_column(self, model: "Type[Model]", field_describe: dict, is_pk: bool = False):
+        db_table = model._meta.db_table
+        description = field_describe.get("description")
+        db_column = field_describe.get("db_column")
+        db_field_types = field_describe.get("db_field_types")
+        default = self._get_default(model, field_describe)
+        if default is None:
            default = ""
        return self._ADD_COLUMN_TEMPLATE.format(
            table_name=db_table,
            column=self.schema_generator._create_string(
-                db_column=field_object.model_field_name,
-                field_type=field_object.get_for_dialect(self.DIALECT, "SQL_TYPE"),
-                nullable="NOT NULL" if not field_object.null else "",
-                unique="UNIQUE" if field_object.unique else "",
+                db_column=db_column,
+                field_type=db_field_types.get(self.DIALECT, db_field_types.get("")),
+                nullable="NOT NULL" if not field_describe.get("nullable") else "",
+                unique="UNIQUE" if field_describe.get("unique") else "",
                comment=self.schema_generator._column_comment_generator(
                    table=db_table,
-                    column=field_object.model_field_name,
-                    comment=field_object.description,
+                    column=db_column,
+                    comment=field_describe.get("description"),
                )
-                if field_object.description
+                if description
                else "",
-                is_primary_key=field_object.pk,
+                is_primary_key=is_pk,
                default=default,
            ),
        )
@@ -98,9 +124,51 @@ class BaseDDL:
            table_name=model._meta.db_table, column_name=column_name
        )

+    def modify_column(self, model: "Type[Model]", field_describe: dict, is_pk: bool = False):
+        db_table = model._meta.db_table
+        db_field_types = field_describe.get("db_field_types")
+        default = self._get_default(model, field_describe)
+        if default is None:
+            default = ""
+        return self._MODIFY_COLUMN_TEMPLATE.format(
+            table_name=db_table,
+            column=self.schema_generator._create_string(
+                db_column=field_describe.get("db_column"),
+                field_type=db_field_types.get(self.DIALECT) or db_field_types.get(""),
+                nullable="NOT NULL" if not field_describe.get("nullable") else "",
+                unique="",
+                comment=self.schema_generator._column_comment_generator(
+                    table=db_table,
+                    column=field_describe.get("db_column"),
+                    comment=field_describe.get("description"),
+                )
+                if field_describe.get("description")
+                else "",
+                is_primary_key=is_pk,
+                default=default,
+            ),
+        )
+
+    def rename_column(self, model: "Type[Model]", old_column_name: str, new_column_name: str):
+        return self._RENAME_COLUMN_TEMPLATE.format(
+            table_name=model._meta.db_table,
+            old_column_name=old_column_name,
+            new_column_name=new_column_name,
+        )
+
+    def change_column(
+        self, model: "Type[Model]", old_column_name: str, new_column_name: str, new_column_type: str
+    ):
+        return self._CHANGE_COLUMN_TEMPLATE.format(
+            table_name=model._meta.db_table,
+            old_column_name=old_column_name,
+            new_column_name=new_column_name,
+            new_column_type=new_column_type,
+        )
+
    def add_index(self, model: "Type[Model]", field_names: List[str], unique=False):
        return self._ADD_INDEX_TEMPLATE.format(
-            unique="UNIQUE" if unique else "",
+            unique="UNIQUE " if unique else "",
            index_name=self.schema_generator._generate_index_name(
                "idx" if not unique else "uid", model, field_names
            ),
@@ -116,39 +184,49 @@ class BaseDDL:
            table_name=model._meta.db_table,
        )

-    def add_fk(self, model: "Type[Model]", field: ForeignKeyFieldInstance):
+    def add_fk(self, model: "Type[Model]", field_describe: dict, reference_table_describe: dict):
        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

-        db_column = field.source_field or field.model_field_name + "_id"
+        db_column = field_describe.get("raw_field")
+        reference_id = reference_table_describe.get("pk_field").get("db_column")
        fk_name = self.schema_generator._generate_fk_name(
            from_table=db_table,
            from_field=db_column,
-            to_table=field.related_model._meta.db_table,
-            to_field=to_field_name,
+            to_table=reference_table_describe.get("table"),
+            to_field=reference_table_describe.get("pk_field").get("db_column"),
        )
        return self._ADD_FK_TEMPLATE.format(
            table_name=db_table,
            fk_name=fk_name,
            db_column=db_column,
-            table=field.related_model._meta.db_table,
-            field=to_field_name,
-            on_delete=field.on_delete,
+            table=reference_table_describe.get("table"),
+            field=reference_id,
+            on_delete=field_describe.get("on_delete"),
        )

-    def drop_fk(self, model: "Type[Model]", field: ForeignKeyFieldInstance):
-        to_field_name = field.to_field_instance.source_field
-        if not to_field_name:
-            to_field_name = field.to_field_instance.model_field_name
+    def drop_fk(self, model: "Type[Model]", field_describe: dict, reference_table_describe: dict):
        db_table = model._meta.db_table
        return self._DROP_FK_TEMPLATE.format(
            table_name=db_table,
            fk_name=self.schema_generator._generate_fk_name(
                from_table=db_table,
-                from_field=field.source_field or field.model_field_name + "_id",
-                to_table=field.related_model._meta.db_table,
-                to_field=to_field_name,
+                from_field=field_describe.get("raw_field"),
+                to_table=reference_table_describe.get("table"),
+                to_field=reference_table_describe.get("pk_field").get("db_column"),
            ),
        )
+
+    def alter_column_default(self, model: "Type[Model]", field_describe: dict):
+        db_table = model._meta.db_table
+        default = self._get_default(model, field_describe)
+        return self._ALTER_DEFAULT_TEMPLATE.format(
+            table_name=db_table,
+            column=field_describe.get("db_column"),
+            default="SET" + default if default is not None else "DROP DEFAULT",
+        )
+
+    def alter_column_null(self, model: "Type[Model]", field_describe: dict):
+        raise NotImplementedError
+
+    def set_comment(self, model: "Type[Model]", field_describe: dict):
+        raise NotImplementedError
--- a/aerich/ddl/mysql/init.py
+++ b/aerich/ddl/mysql/init.py
@@ -1,8 +1,36 @@
+from typing import Type
+
+from tortoise import Model
 from tortoise.backends.mysql.schema_generator import MySQLSchemaGenerator

 from aerich.ddl import BaseDDL
+from aerich.exceptions import NotSupportError


 class MysqlDDL(BaseDDL):
    schema_generator_cls = MySQLSchemaGenerator
    DIALECT = MySQLSchemaGenerator.DIALECT
+    _DROP_TABLE_TEMPLATE = "DROP TABLE IF EXISTS `{table_name}`"
+    _ADD_COLUMN_TEMPLATE = "ALTER TABLE `{table_name}` ADD {column}"
+    _ALTER_DEFAULT_TEMPLATE = "ALTER TABLE `{table_name}` ALTER COLUMN `{column}` {default}"
+    _CHANGE_COLUMN_TEMPLATE = (
+        "ALTER TABLE `{table_name}` CHANGE {old_column_name} {new_column_name} {new_column_type}"
+    )
+    _DROP_COLUMN_TEMPLATE = "ALTER TABLE `{table_name}` DROP COLUMN `{column_name}`"
+    _RENAME_COLUMN_TEMPLATE = (
+        "ALTER TABLE `{table_name}` RENAME COLUMN `{old_column_name}` TO `{new_column_name}`"
+    )
+    _ADD_INDEX_TEMPLATE = (
+        "ALTER TABLE `{table_name}` ADD {unique}INDEX `{index_name}` ({column_names})"
+    )
+    _DROP_INDEX_TEMPLATE = "ALTER TABLE `{table_name}` DROP INDEX `{index_name}`"
+    _ADD_FK_TEMPLATE = "ALTER TABLE `{table_name}` ADD CONSTRAINT `{fk_name}` FOREIGN KEY (`{db_column}`) REFERENCES `{table}` (`{field}`) ON DELETE {on_delete}"
+    _DROP_FK_TEMPLATE = "ALTER TABLE `{table_name}` DROP FOREIGN KEY `{fk_name}`"
+    _M2M_TABLE_TEMPLATE = "CREATE TABLE `{table_name}` (`{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}"
+    _MODIFY_COLUMN_TEMPLATE = "ALTER TABLE `{table_name}` MODIFY COLUMN {column}"
+
+    def alter_column_null(self, model: "Type[Model]", field_describe: dict):
+        raise NotSupportError("Alter column null is unsupported in MySQL.")
+
+    def set_comment(self, model: "Type[Model]", field_describe: dict):
+        raise NotSupportError("Alter column comment is unsupported in MySQL.")
--- a/aerich/ddl/postgres/init.py
+++ b/aerich/ddl/postgres/init.py
@@ -1,3 +1,6 @@
+from typing import Type
+
+from tortoise import Model
 from tortoise.backends.asyncpg.schema_generator import AsyncpgSchemaGenerator

 from aerich.ddl import BaseDDL
@@ -6,3 +9,36 @@ from aerich.ddl import BaseDDL
 class PostgresDDL(BaseDDL):
    schema_generator_cls = AsyncpgSchemaGenerator
    DIALECT = AsyncpgSchemaGenerator.DIALECT
+    _ADD_INDEX_TEMPLATE = 'CREATE {unique}INDEX "{index_name}" ON "{table_name}" ({column_names})'
+    _DROP_INDEX_TEMPLATE = 'DROP INDEX "{index_name}"'
+    _ALTER_NULL_TEMPLATE = 'ALTER TABLE "{table_name}" ALTER COLUMN "{column}" {set_drop} NOT NULL'
+    _MODIFY_COLUMN_TEMPLATE = 'ALTER TABLE "{table_name}" ALTER COLUMN "{column}" TYPE {datatype}'
+    _SET_COMMENT_TEMPLATE = 'COMMENT ON COLUMN "{table_name}"."{column}" IS {comment}'
+    _DROP_FK_TEMPLATE = 'ALTER TABLE "{table_name}" DROP CONSTRAINT "{fk_name}"'
+
+    def alter_column_null(self, model: "Type[Model]", field_describe: dict):
+        db_table = model._meta.db_table
+        return self._ALTER_NULL_TEMPLATE.format(
+            table_name=db_table,
+            column=field_describe.get("db_column"),
+            set_drop="DROP" if field_describe.get("nullable") else "SET",
+        )
+
+    def modify_column(self, model: "Type[Model]", field_describe: dict, is_pk: bool = False):
+        db_table = model._meta.db_table
+        db_field_types = field_describe.get("db_field_types")
+        return self._MODIFY_COLUMN_TEMPLATE.format(
+            table_name=db_table,
+            column=field_describe.get("db_column"),
+            datatype=db_field_types.get(self.DIALECT) or db_field_types.get(""),
+        )
+
+    def set_comment(self, model: "Type[Model]", field_describe: dict):
+        db_table = model._meta.db_table
+        return self._SET_COMMENT_TEMPLATE.format(
+            table_name=db_table,
+            column=field_describe.get("db_column") or field_describe.get("raw_field"),
+            comment="'{}'".format(field_describe.get("description"))
+            if field_describe.get("description")
+            else "NULL",
+        )
--- a/aerich/ddl/sqlite/init.py
+++ b/aerich/ddl/sqlite/init.py
@@ -1,8 +1,27 @@
+from typing import Type
+
+from tortoise import Model
 from tortoise.backends.sqlite.schema_generator import SqliteSchemaGenerator

 from aerich.ddl import BaseDDL
+from aerich.exceptions import NotSupportError


 class SqliteDDL(BaseDDL):
    schema_generator_cls = SqliteSchemaGenerator
    DIALECT = SqliteSchemaGenerator.DIALECT
+
+    def drop_column(self, model: "Type[Model]", column_name: str):
+        raise NotSupportError("Drop column is unsupported in SQLite.")
+
+    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.")
--- a/aerich/enums.py
+++ b/aerich/enums.py
@@ -0,0 +1,7 @@
+from enum import Enum
+
+
+class Color(str, Enum):
+    green = "green"
+    red = "red"
+    yellow = "yellow"
--- a/aerich/exceptions.py
+++ b/aerich/exceptions.py
@@ -1,6 +1,4 @@
-class ConfigurationError(Exception):
+class NotSupportError(Exception):
    """
-    config error
+    raise when features not support
    """
-
-    pass
--- a/aerich/inspectdb.py
+++ b/aerich/inspectdb.py
@@ -0,0 +1,85 @@
+import sys
+from typing import List, Optional
+
+from ddlparse import DdlParse
+from tortoise import BaseDBAsyncClient
+
+
+class InspectDb:
+    _table_template = "class {table}(Model):\n"
+    _field_template_mapping = {
+        "INT": "    {field} = fields.IntField({pk}{unique}{comment})",
+        "SMALLINT": "    {field} = fields.IntField({pk}{unique}{comment})",
+        "TINYINT": "    {field} = fields.BooleanField({null}{default}{comment})",
+        "VARCHAR": "    {field} = fields.CharField({pk}{unique}{length}{null}{default}{comment})",
+        "LONGTEXT": "    {field} = fields.TextField({null}{default}{comment})",
+        "TEXT": "    {field} = fields.TextField({null}{default}{comment})",
+        "DATETIME": "    {field} = fields.DatetimeField({null}{default}{comment})",
+    }
+
+    def __init__(self, conn: BaseDBAsyncClient, tables: Optional[List[str]] = None):
+        self.conn = conn
+        self.tables = tables
+        self.DIALECT = conn.schema_generator.DIALECT
+
+    async def show_create_tables(self):
+        if self.DIALECT == "mysql":
+            if not self.tables:
+                sql_tables = f"SELECT table_name FROM information_schema.tables WHERE table_schema = '{self.conn.database}';"  # nosec: B608
+                ret = await self.conn.execute_query(sql_tables)
+                self.tables = map(lambda x: x["TABLE_NAME"], ret[1])
+            for table in self.tables:
+                sql_show_create_table = f"SHOW CREATE TABLE {table}"
+                ret = await self.conn.execute_query(sql_show_create_table)
+                yield ret[1][0]["Create Table"]
+        else:
+            raise NotImplementedError("Currently only support MySQL")
+
+    async def inspect(self):
+        ddl_list = self.show_create_tables()
+        result = "from tortoise import Model, fields\n\n\n"
+        tables = []
+        async for ddl in ddl_list:
+            parser = DdlParse(ddl, DdlParse.DATABASE.mysql)
+            table = parser.parse()
+            name = table.name.title()
+            columns = table.columns
+            fields = []
+            model = self._table_template.format(table=name)
+            for column_name, column in columns.items():
+                comment = default = length = unique = null = pk = ""
+                if column.primary_key:
+                    pk = "pk=True, "
+                if column.unique:
+                    unique = "unique=True, "
+                if column.data_type == "VARCHAR":
+                    length = f"max_length={column.length}, "
+                if not column.not_null:
+                    null = "null=True, "
+                if column.default is not None:
+                    if column.data_type == "TINYINT":
+                        default = f"default={'True' if column.default == '1' else 'False'}, "
+                    elif column.data_type == "DATETIME":
+                        if "CURRENT_TIMESTAMP" in column.default:
+                            if "ON UPDATE CURRENT_TIMESTAMP" in ddl:
+                                default = "auto_now_add=True, "
+                            else:
+                                default = "auto_now=True, "
+                    else:
+                        default = f"default={column.default}, "
+
+                if column.comment:
+                    comment = f"description='{column.comment}', "
+
+                field = self._field_template_mapping[column.data_type].format(
+                    field=column_name,
+                    pk=pk,
+                    unique=unique,
+                    length=length,
+                    null=null,
+                    default=default,
+                    comment=comment,
+                )
+                fields.append(field)
+            tables.append(model + "\n".join(fields))
+        sys.stdout.write(result + "\n\n\n".join(tables))
--- a/aerich/migrate.py
+++ b/aerich/migrate.py
@@ -1,23 +1,16 @@
-import json
 import os
-import re
-from copy import deepcopy
 from datetime import datetime
-from typing import Dict, List, Tuple, Type
+from pathlib import Path
+from typing import Dict, List, Optional, Tuple, Type

-from tortoise import (
-    BackwardFKRelation,
-    BackwardOneToOneRelation,
-    ForeignKeyFieldInstance,
-    ManyToManyFieldInstance,
-    Model,
-    Tortoise,
-)
-from tortoise.fields import Field
+import click
+from dictdiffer import diff
+from tortoise import BaseDBAsyncClient, Model, Tortoise
+from tortoise.exceptions import OperationalError

 from aerich.ddl import BaseDDL
-from aerich.models import Aerich
-from aerich.utils import get_app_connection
+from aerich.models import MAX_VERSION_LENGTH, Aerich
+from aerich.utils import get_app_connection, get_models_describe, write_version_file


 class Migrate:
@@ -27,71 +20,98 @@ class Migrate:
    _downgrade_fk_m2m_index_operators: List[str] = []
    _upgrade_m2m: List[str] = []
    _downgrade_m2m: List[str] = []
+    _aerich = Aerich.__name__
+    _rename_old = []
+    _rename_new = []

    ddl: BaseDDL
-    migrate_config: dict
-    old_models = "old_models"
-    diff_app = "diff_models"
+    _last_version_content: Optional[dict] = None
    app: str
    migrate_location: str
-
-    @classmethod
-    def get_old_model_file(cls):
-        return cls.old_models + ".py"
+    dialect: str
+    _db_version: Optional[str] = None

    @classmethod
    def get_all_version_files(cls) -> List[str]:
-        return sorted(filter(lambda x: x.endswith("json"), os.listdir(cls.migrate_location)))
+        return sorted(
+            filter(lambda x: x.endswith("sql"), os.listdir(cls.migrate_location)),
+            key=lambda x: int(x.split("_")[0]),
+        )

    @classmethod
-    async def get_last_version(cls) -> Aerich:
-        return await Aerich.filter(app=cls.app).first()
+    def _get_model(cls, model: str) -> Type[Model]:
+        return Tortoise.apps.get(cls.app).get(model)

    @classmethod
-    async def init_with_old_models(cls, config: dict, app: str, location: str):
-        migrate_config = cls._get_migrate_config(config, app, location)
+    async def get_last_version(cls) -> Optional[Aerich]:
+        try:
+            return await Aerich.filter(app=cls.app).first()
+        except OperationalError:
+            pass

+    @classmethod
+    async def _get_db_version(cls, connection: BaseDBAsyncClient):
+        if cls.dialect == "mysql":
+            sql = "select version() as version"
+            ret = await connection.execute_query(sql)
+            cls._db_version = ret[1][0].get("version")
+
+    @classmethod
+    async def init(cls, config: dict, app: str, location: str):
+        await Tortoise.init(config=config)
+        last_version = await cls.get_last_version()
        cls.app = app
-        cls.migrate_config = migrate_config
-        cls.migrate_location = os.path.join(location, app)
-
-        await Tortoise.init(config=migrate_config)
+        cls.migrate_location = Path(location, app)
+        if last_version:
+            cls._last_version_content = last_version.content

        connection = get_app_connection(config, app)
-        if connection.schema_generator.DIALECT == "mysql":
+        cls.dialect = connection.schema_generator.DIALECT
+        if cls.dialect == "mysql":
            from aerich.ddl.mysql import MysqlDDL

            cls.ddl = MysqlDDL(connection)
-        elif connection.schema_generator.DIALECT == "sqlite":
+        elif cls.dialect == "sqlite":
            from aerich.ddl.sqlite import SqliteDDL

            cls.ddl = SqliteDDL(connection)
-        elif connection.schema_generator.DIALECT == "postgres":
+        elif cls.dialect == "postgres":
            from aerich.ddl.postgres import PostgresDDL

            cls.ddl = PostgresDDL(connection)
-        else:
-            raise NotImplementedError("Current only support MySQL")
+        await cls._get_db_version(connection)

    @classmethod
    async def _get_last_version_num(cls):
        last_version = await cls.get_last_version()
        if not last_version:
-            return 0
+            return None
        version = last_version.version
-        return version.split("_")[0]
+        return int(version.split("_", 1)[0])
+
+    @classmethod
+    async def generate_version(cls, name=None):
+        now = datetime.now().strftime("%Y%m%d%H%M%S").replace("/", "")
+        last_version_num = await cls._get_last_version_num()
+        if last_version_num is None:
+            return f"0_{now}_init.sql"
+        version = f"{last_version_num + 1}_{now}_{name}.sql"
+        if len(version) > MAX_VERSION_LENGTH:
+            raise ValueError(f"Version name exceeds maximum length ({MAX_VERSION_LENGTH})")
+        return version

    @classmethod
    async def _generate_diff_sql(cls, name):
-        now = datetime.now().strftime("%Y%M%D%H%M%S").replace("/", "")
-        last_version_num = await cls._get_last_version_num()
-        version = f"{last_version_num + 1}_{now}_{name}.json"
+        version = await cls.generate_version(name)
+        # delete if same version exists
+        for version_file in cls.get_all_version_files():
+            if version_file.startswith(version.split("_")[0]):
+                os.unlink(Path(cls.migrate_location, version_file))
        content = {
            "upgrade": cls.upgrade_operators,
            "downgrade": cls.downgrade_operators,
        }
-        with open(os.path.join(cls.migrate_location, version), "w") as f:
-            json.dump(content, f, indent=2, ensure_ascii=False)
+        write_version_file(Path(cls.migrate_location, version), content)
        return version

    @classmethod
@@ -101,12 +121,9 @@ class Migrate:
        :param name:
        :return:
        """
-        apps = Tortoise.apps
-        diff_models = apps.get(cls.diff_app)
-        app_models = apps.get(cls.app)
-
-        cls._diff_models(diff_models, app_models)
-        cls._diff_models(app_models, diff_models, False)
+        new_version_content = get_models_describe(cls.app)
+        cls.diff_models(cls._last_version_content, new_version_content)
+        cls.diff_models(new_version_content, cls._last_version_content, False)

        cls._merge_operators()

@@ -116,7 +133,7 @@ class Migrate:
        return await cls._generate_diff_sql(name)

    @classmethod
-    def _add_operator(cls, operator: str, upgrade=True, fk=False):
+    def _add_operator(cls, operator: str, upgrade=True, fk_m2m=False):
        """
        add operator,differentiate fk because fk is order limit
        :param operator:
@@ -125,71 +142,18 @@ class Migrate:
        :return:
        """
        if upgrade:
-            if fk:
+            if fk_m2m:
                cls._upgrade_fk_m2m_index_operators.append(operator)
            else:
                cls.upgrade_operators.append(operator)
        else:
-            if fk:
+            if fk_m2m:
                cls._downgrade_fk_m2m_index_operators.append(operator)
            else:
                cls.downgrade_operators.append(operator)

    @classmethod
-    def cp_models(
-        cls, app: str, model_files: List[str], old_model_file,
-    ):
-        """
-        cp currents models to old_model_files
-        :param app:
-        :param model_files:
-        :param old_model_file:
-        :return:
-        """
-        pattern = rf"(\n)?('|\")({app})(.\w+)('|\")"
-        for i, model_file in enumerate(model_files):
-            with open(model_file, "r") as f:
-                content = f.read()
-            ret = re.sub(pattern, rf"\2{cls.diff_app}\4\5", content)
-            mode = "w" if i == 0 else "a"
-            with open(old_model_file, mode) as f:
-                f.write(ret)
-
-    @classmethod
-    def _get_migrate_config(cls, config: dict, app: str, location: str):
-        """
-        generate tmp config with old models
-        :param config:
-        :param app:
-        :param location:
-        :return:
-        """
-        temp_config = deepcopy(config)
-        path = os.path.join(location, app, cls.old_models)
-        path = path.replace("/", ".").lstrip(".")
-        temp_config["apps"][cls.diff_app] = {"models": [path]}
-        return temp_config
-
-    @classmethod
-    def write_old_models(cls, config: dict, app: str, location: str):
-        """
-        write new models to old models
-        :param config:
-        :param app:
-        :param location:
-        :return:
-        """
-        old_model_files = []
-        models = config.get("apps").get(app).get("models")
-        for model in models:
-            old_model_files.append(model.replace(".", "/") + ".py")
-
-        cls.cp_models(app, old_model_files, os.path.join(location, app, cls.get_old_model_file()))
-
-    @classmethod
-    def _diff_models(
-        cls, old_models: Dict[str, Type[Model]], new_models: Dict[str, Type[Model]], upgrade=True
-    ):
+    def diff_models(cls, old_models: Dict[str, dict], new_models: Dict[str, dict], upgrade=True):
        """
        diff models and add operators
        :param old_models:
@@ -197,98 +161,248 @@ class Migrate:
        :param upgrade:
        :return:
        """
-        for new_model_str, new_model in new_models.items():
+        _aerich = f"{cls.app}.{cls._aerich}"
+        old_models.pop(_aerich, None)
+        new_models.pop(_aerich, None)
+
+        for new_model_str, new_model_describe in new_models.items():
+            model = cls._get_model(new_model_describe.get("name").split(".")[1])
+
            if new_model_str not in old_models.keys():
-                cls._add_operator(cls.add_model(new_model), upgrade)
+                cls._add_operator(cls.add_model(model), upgrade)
            else:
-                cls.diff_model(old_models.get(new_model_str), new_model, upgrade)
+                old_model_describe = old_models.get(new_model_str)
+
+                old_unique_together = set(
+                    map(lambda x: tuple(x), old_model_describe.get("unique_together"))
+                )
+                new_unique_together = set(
+                    map(lambda x: tuple(x), new_model_describe.get("unique_together"))
+                )
+
+                old_pk_field = old_model_describe.get("pk_field")
+                new_pk_field = new_model_describe.get("pk_field")
+                # pk field
+                changes = diff(old_pk_field, new_pk_field)
+                for action, option, change in changes:
+                    # current only support rename pk
+                    if action == "change" and option == "name":
+                        cls._add_operator(cls._rename_field(model, *change), upgrade)
+                # m2m fields
+                old_m2m_fields = old_model_describe.get("m2m_fields")
+                new_m2m_fields = new_model_describe.get("m2m_fields")
+                for action, option, change in diff(old_m2m_fields, new_m2m_fields):
+                    table = change[0][1].get("through")
+                    if action == "add":
+                        add = False
+                        if upgrade and table not in cls._upgrade_m2m:
+                            cls._upgrade_m2m.append(table)
+                            add = True
+                        elif not upgrade and table not in cls._downgrade_m2m:
+                            cls._downgrade_m2m.append(table)
+                            add = True
+                        if add:
+                            cls._add_operator(
+                                cls.create_m2m(
+                                    model,
+                                    change[0][1],
+                                    new_models.get(change[0][1].get("model_name")),
+                                ),
+                                upgrade,
+                                fk_m2m=True,
+                            )
+                    elif action == "remove":
+                        add = False
+                        if upgrade and table not in cls._upgrade_m2m:
+                            cls._upgrade_m2m.append(table)
+                            add = True
+                        elif not upgrade and table not in cls._downgrade_m2m:
+                            cls._downgrade_m2m.append(table)
+                            add = True
+                        if add:
+                            cls._add_operator(cls.drop_m2m(table), upgrade, fk_m2m=True)
+                # add unique_together
+                for index in new_unique_together.difference(old_unique_together):
+                    cls._add_operator(
+                        cls._add_index(model, index, True),
+                        upgrade,
+                    )
+                # remove unique_together
+                for index in old_unique_together.difference(new_unique_together):
+                    cls._add_operator(
+                        cls._drop_index(model, index, True),
+                        upgrade,
+                    )
+
+                old_data_fields = old_model_describe.get("data_fields")
+                new_data_fields = new_model_describe.get("data_fields")
+
+                old_data_fields_name = list(map(lambda x: x.get("name"), old_data_fields))
+                new_data_fields_name = list(map(lambda x: x.get("name"), new_data_fields))
+
+                # add fields or rename fields
+                for new_data_field_name in set(new_data_fields_name).difference(
+                    set(old_data_fields_name)
+                ):
+                    new_data_field = next(
+                        filter(lambda x: x.get("name") == new_data_field_name, new_data_fields)
+                    )
+                    is_rename = False
+                    for old_data_field in old_data_fields:
+                        changes = list(diff(old_data_field, new_data_field))
+                        old_data_field_name = old_data_field.get("name")
+                        if len(changes) == 2:
+                            # rename field
+                            if changes[0] == (
+                                "change",
+                                "name",
+                                (old_data_field_name, new_data_field_name),
+                            ) and changes[1] == (
+                                "change",
+                                "db_column",
+                                (old_data_field.get("db_column"), new_data_field.get("db_column")),
+                            ):
+                                if upgrade:
+                                    is_rename = click.prompt(
+                                        f"Rename {old_data_field_name} to {new_data_field_name}?",
+                                        default=True,
+                                        type=bool,
+                                        show_choices=True,
+                                    )
+                                else:
+                                    is_rename = old_data_field_name in cls._rename_new
+                                if is_rename:
+                                    cls._rename_new.append(new_data_field_name)
+                                    cls._rename_old.append(old_data_field_name)
+                                    # only MySQL8+ has rename syntax
+                                    if (
+                                        cls.dialect == "mysql"
+                                        and cls._db_version
+                                        and cls._db_version.startswith("5.")
+                                    ):
+                                        cls._add_operator(
+                                            cls._change_field(
+                                                model, new_data_field, old_data_field
+                                            ),
+                                            upgrade,
+                                        )
+                                    else:
+                                        cls._add_operator(
+                                            cls._rename_field(model, *changes[1][2]),
+                                            upgrade,
+                                        )
+                    if not is_rename:
+                        cls._add_operator(
+                            cls._add_field(
+                                model,
+                                new_data_field,
+                            ),
+                            upgrade,
+                        )
+                # remove fields
+                for old_data_field_name in set(old_data_fields_name).difference(
+                    set(new_data_fields_name)
+                ):
+                    # don't remove field if is rename
+                    if (upgrade and old_data_field_name in cls._rename_old) or (
+                        not upgrade and old_data_field_name in cls._rename_new
+                    ):
+                        continue
+                    cls._add_operator(
+                        cls._remove_field(
+                            model,
+                            next(
+                                filter(
+                                    lambda x: x.get("name") == old_data_field_name, old_data_fields
+                                )
+                            ).get("db_column"),
+                        ),
+                        upgrade,
+                    )
+                old_fk_fields = old_model_describe.get("fk_fields")
+                new_fk_fields = new_model_describe.get("fk_fields")
+
+                old_fk_fields_name = list(map(lambda x: x.get("name"), old_fk_fields))
+                new_fk_fields_name = list(map(lambda x: x.get("name"), new_fk_fields))
+
+                # add fk
+                for new_fk_field_name in set(new_fk_fields_name).difference(
+                    set(old_fk_fields_name)
+                ):
+                    fk_field = next(
+                        filter(lambda x: x.get("name") == new_fk_field_name, new_fk_fields)
+                    )
+                    cls._add_operator(
+                        cls._add_fk(model, fk_field, new_models.get(fk_field.get("python_type"))),
+                        upgrade,
+                        fk_m2m=True,
+                    )
+                # drop fk
+                for old_fk_field_name in set(old_fk_fields_name).difference(
+                    set(new_fk_fields_name)
+                ):
+                    old_fk_field = next(
+                        filter(lambda x: x.get("name") == old_fk_field_name, old_fk_fields)
+                    )
+                    cls._add_operator(
+                        cls._drop_fk(
+                            model, old_fk_field, old_models.get(old_fk_field.get("python_type"))
+                        ),
+                        upgrade,
+                        fk_m2m=True,
+                    )
+                # change fields
+                for field_name in set(new_data_fields_name).intersection(set(old_data_fields_name)):
+                    old_data_field = next(
+                        filter(lambda x: x.get("name") == field_name, old_data_fields)
+                    )
+                    new_data_field = next(
+                        filter(lambda x: x.get("name") == field_name, new_data_fields)
+                    )
+                    changes = diff(old_data_field, new_data_field)
+                    for change in changes:
+                        _, option, old_new = change
+                        if option == "indexed":
+                            # change index
+                            unique = new_data_field.get("unique")
+                            if old_new[0] is False and old_new[1] is True:
+                                cls._add_operator(
+                                    cls._add_index(model, (field_name,), unique),
+                                    upgrade,
+                                )
+                            else:
+                                cls._add_operator(
+                                    cls._drop_index(model, (field_name,), unique),
+                                    upgrade,
+                                )
+                        elif option == "db_field_types.":
+                            # change column
+                            cls._add_operator(
+                                cls._change_field(model, old_data_field, new_data_field),
+                                upgrade,
+                            )
+                        elif option == "default":
+                            cls._add_operator(cls._alter_default(model, new_data_field), upgrade)

        for old_model in old_models:
            if old_model not in new_models.keys():
-                cls._add_operator(cls.remove_model(old_models.get(old_model)), upgrade)
+                cls._add_operator(cls.drop_model(old_models.get(old_model).get("table")), upgrade)

    @classmethod
    def add_model(cls, model: Type[Model]):
        return cls.ddl.create_table(model)

    @classmethod
-    def remove_model(cls, model: Type[Model]):
-        return cls.ddl.drop_table(model)
+    def drop_model(cls, table_name: str):
+        return cls.ddl.drop_table(table_name)

    @classmethod
-    def diff_model(cls, old_model: Type[Model], new_model: Type[Model], upgrade=True):
-        """
-        diff single model
-        :param old_model:
-        :param new_model:
-        :param upgrade:
-        :return:
-        """
-        old_indexes = old_model._meta.indexes
-        new_indexes = new_model._meta.indexes
+    def create_m2m(cls, model: Type[Model], field_describe: dict, reference_table_describe: dict):
+        return cls.ddl.create_m2m(model, field_describe, reference_table_describe)

-        old_unique_together = old_model._meta.unique_together
-        new_unique_together = new_model._meta.unique_together
-
-        old_fields_map = old_model._meta.fields_map
-        new_fields_map = new_model._meta.fields_map
-
-        old_keys = old_fields_map.keys()
-        new_keys = new_fields_map.keys()
-        for new_key in new_keys:
-            new_field = new_fields_map.get(new_key)
-            if cls._exclude_field(new_field, upgrade):
-                continue
-            if new_key not in old_keys:
-                cls._add_operator(
-                    cls._add_field(new_model, new_field),
-                    upgrade,
-                    isinstance(new_field, (ForeignKeyFieldInstance, ManyToManyFieldInstance)),
-                )
-            else:
-                old_field = old_fields_map.get(new_key)
-                if (old_field.index and not new_field.index) or (
-                    old_field.unique and not new_field.unique
-                ):
-                    cls._add_operator(
-                        cls._remove_index(
-                            old_model, (old_field.model_field_name,), old_field.unique
-                        ),
-                        upgrade,
-                        isinstance(old_field, (ForeignKeyFieldInstance, ManyToManyFieldInstance)),
-                    )
-                elif (new_field.index and not old_field.index) or (
-                    new_field.unique and not old_field.unique
-                ):
-                    cls._add_operator(
-                        cls._add_index(new_model, (new_field.model_field_name,), new_field.unique),
-                        upgrade,
-                        isinstance(new_field, (ForeignKeyFieldInstance, ManyToManyFieldInstance)),
-                    )
-
-        for old_key in old_keys:
-            field = old_fields_map.get(old_key)
-            if old_key not in new_keys and not cls._exclude_field(field, upgrade):
-                cls._add_operator(
-                    cls._remove_field(old_model, field),
-                    upgrade,
-                    isinstance(field, (ForeignKeyFieldInstance, ManyToManyFieldInstance)),
-                )
-
-        for new_index in new_indexes:
-            if new_index not in old_indexes:
-                cls._add_operator(cls._add_index(new_model, new_index,), upgrade)
-        for old_index in old_indexes:
-            if old_index not in new_indexes:
-                cls._add_operator(cls._remove_index(old_model, old_index), upgrade)
-
-        for new_unique in new_unique_together:
-            if new_unique not in old_unique_together:
-                cls._add_operator(cls._add_index(new_model, new_unique, unique=True), upgrade)
-
-        for old_unique in old_unique_together:
-            if old_unique not in new_unique_together:
-                cls._add_operator(cls._remove_index(old_model, old_unique, unique=True), upgrade)
+    @classmethod
+    def drop_m2m(cls, table_name: str):
+        return cls.ddl.drop_m2m(table_name)

    @classmethod
    def _resolve_fk_fields_name(cls, model: Type[Model], fields_name: Tuple[str]):
@@ -301,7 +415,7 @@ class Migrate:
        return ret

    @classmethod
-    def _remove_index(cls, model: Type[Model], fields_name: Tuple[str], unique=False):
+    def _drop_index(cls, model: Type[Model], fields_name: Tuple[str], unique=False):
        fields_name = cls._resolve_fk_fields_name(model, fields_name)
        return cls.ddl.drop_index(model, fields_name, unique)

@@ -311,63 +425,57 @@ class Migrate:
        return cls.ddl.add_index(model, fields_name, unique)

    @classmethod
-    def _exclude_field(cls, field: Field, upgrade=False):
-        """
-        exclude BackwardFKRelation and repeat m2m field
-        :param field:
-        :return:
-        """
-        if isinstance(field, ManyToManyFieldInstance):
-            through = field.through
-            if upgrade:
-                if through in cls._upgrade_m2m:
-                    return True
-                else:
-                    cls._upgrade_m2m.append(through)
-                    return False
-            else:
-                if through in cls._downgrade_m2m:
-                    return True
-                else:
-                    cls._downgrade_m2m.append(through)
-                    return False
-        return isinstance(field, (BackwardFKRelation, BackwardOneToOneRelation))
+    def _add_field(cls, model: Type[Model], field_describe: dict, is_pk: bool = False):
+        return cls.ddl.add_column(model, field_describe, is_pk)

    @classmethod
-    def _add_field(cls, model: Type[Model], field: Field):
-        if isinstance(field, ForeignKeyFieldInstance):
-            return cls.ddl.add_fk(model, field)
-        if isinstance(field, ManyToManyFieldInstance):
-            return cls.ddl.create_m2m_table(model, field)
-        return cls.ddl.add_column(model, field)
+    def _alter_default(cls, model: Type[Model], field_describe: dict):
+        return cls.ddl.alter_column_default(model, field_describe)

    @classmethod
-    def _remove_field(cls, model: Type[Model], field: Field):
-        if isinstance(field, ForeignKeyFieldInstance):
-            return cls.ddl.drop_fk(model, field)
-        if isinstance(field, ManyToManyFieldInstance):
-            return cls.ddl.drop_m2m(field)
-        return cls.ddl.drop_column(model, field.model_field_name)
+    def _alter_null(cls, model: Type[Model], field_describe: dict):
+        return cls.ddl.alter_column_null(model, field_describe)

    @classmethod
-    def _add_fk(cls, model: Type[Model], field: ForeignKeyFieldInstance):
+    def _set_comment(cls, model: Type[Model], field_describe: dict):
+        return cls.ddl.set_comment(model, field_describe)
+
+    @classmethod
+    def _modify_field(cls, model: Type[Model], field_describe: dict):
+        return cls.ddl.modify_column(model, field_describe)
+
+    @classmethod
+    def _drop_fk(cls, model: Type[Model], field_describe: dict, reference_table_describe: dict):
+        return cls.ddl.drop_fk(model, field_describe, reference_table_describe)
+
+    @classmethod
+    def _remove_field(cls, model: Type[Model], column_name: str):
+        return cls.ddl.drop_column(model, column_name)
+
+    @classmethod
+    def _rename_field(cls, model: Type[Model], old_field_name: str, new_field_name: str):
+        return cls.ddl.rename_column(model, old_field_name, new_field_name)
+
+    @classmethod
+    def _change_field(cls, model: Type[Model], old_field_describe: dict, new_field_describe: dict):
+        db_field_types = new_field_describe.get("db_field_types")
+        return cls.ddl.change_column(
+            model,
+            old_field_describe.get("db_column"),
+            new_field_describe.get("db_column"),
+            db_field_types.get(cls.dialect) or db_field_types.get(""),
+        )
+
+    @classmethod
+    def _add_fk(cls, model: Type[Model], field_describe: dict, reference_table_describe: dict):
        """
        add fk
        :param model:
-        :param field:
+        :param field_describe:
+        :param reference_table_describe:
        :return:
        """
-        return cls.ddl.add_fk(model, field)
-
-    @classmethod
-    def _remove_fk(cls, model: Type[Model], field: ForeignKeyFieldInstance):
-        """
-        drop fk
-        :param model:
-        :param field:
-        :return:
-        """
-        return cls.ddl.drop_fk(model, field)
+        return cls.ddl.add_fk(model, field_describe, reference_table_describe)

    @classmethod
    def _merge_operators(cls):
--- a/aerich/models.py
+++ b/aerich/models.py
@@ -1,9 +1,12 @@
 from tortoise import Model, fields

+MAX_VERSION_LENGTH = 255
+

 class Aerich(Model):
-    version = fields.CharField(max_length=50)
+    version = fields.CharField(max_length=MAX_VERSION_LENGTH)
    app = fields.CharField(max_length=20)
+    content = fields.JSONField()

    class Meta:
        ordering = ["-id"]
--- a/aerich/utils.py
+++ b/aerich/utils.py
@@ -1,17 +1,24 @@
 import importlib
+from typing import Dict

-from asyncclick import BadOptionUsage, Context
+from click import BadOptionUsage, Context
 from tortoise import BaseDBAsyncClient, Tortoise


-def get_app_connection_name(config, app) -> str:
+def get_app_connection_name(config, app_name: str) -> str:
    """
    get connection name
    :param config:
-    :param app:
+    :param app_name:
    :return:
    """
-    return config.get("apps").get(app).get("default_connection")
+    app = config.get("apps").get(app_name)
+    if app:
+        return app.get("default_connection", "default")
+    raise BadOptionUsage(
+        option_name="--app",
+        message=f'Can\'t get app named "{app_name}"',
+    )


 def get_app_connection(config, app) -> BaseDBAsyncClient:
@@ -49,3 +56,68 @@ def get_tortoise_config(ctx: Context, tortoise_orm: str) -> dict:
            ctx=ctx,
        )
    return config
+
+
+_UPGRADE = "-- upgrade --\n"
+_DOWNGRADE = "-- downgrade --\n"
+
+
+def get_version_content_from_file(version_file: str) -> Dict:
+    """
+    get version content
+    :param version_file:
+    :return:
+    """
+    with open(version_file, "r", encoding="utf-8") as f:
+        content = f.read()
+        first = content.index(_UPGRADE)
+        try:
+            second = content.index(_DOWNGRADE)
+        except ValueError:
+            second = len(content) - 1
+        upgrade_content = content[first + len(_UPGRADE) : second].strip()  # noqa:E203
+        downgrade_content = content[second + len(_DOWNGRADE) :].strip()  # noqa:E203
+        ret = {
+            "upgrade": list(filter(lambda x: x or False, upgrade_content.split(";\n"))),
+            "downgrade": list(filter(lambda x: x or False, downgrade_content.split(";\n"))),
+        }
+        return ret
+
+
+def write_version_file(version_file: str, content: Dict):
+    """
+    write version file
+    :param version_file:
+    :param content:
+    :return:
+    """
+    with open(version_file, "w", encoding="utf-8") as f:
+        f.write(_UPGRADE)
+        upgrade = content.get("upgrade")
+        if len(upgrade) > 1:
+            f.write(";\n".join(upgrade) + ";\n")
+        else:
+            f.write(f"{upgrade[0]}")
+            if not upgrade[0].endswith(";"):
+                f.write(";")
+            f.write("\n")
+        downgrade = content.get("downgrade")
+        if downgrade:
+            f.write(_DOWNGRADE)
+            if len(downgrade) > 1:
+                f.write(";\n".join(downgrade) + ";\n")
+            else:
+                f.write(f"{downgrade[0]};\n")
+
+
+def get_models_describe(app: str) -> Dict:
+    """
+    get app models describe
+    :param app:
+    :return:
+    """
+    ret = {}
+    for model in Tortoise.apps.get(app).values():
+        describe = model.describe()
+        ret[describe.get("name")] = describe
+    return ret
--- a/conftest.py
+++ b/conftest.py
@@ -1,11 +1,68 @@
+import asyncio
 import os

 import pytest
-from tortoise.contrib.test import finalizer, initializer
+from tortoise import Tortoise, expand_db_url, generate_schema_for_client
+from tortoise.backends.asyncpg.schema_generator import AsyncpgSchemaGenerator
+from tortoise.backends.mysql.schema_generator import MySQLSchemaGenerator
+from tortoise.backends.sqlite.schema_generator import SqliteSchemaGenerator
+
+from aerich.ddl.mysql import MysqlDDL
+from aerich.ddl.postgres import PostgresDDL
+from aerich.ddl.sqlite import SqliteDDL
+from aerich.migrate import Migrate
+
+db_url = os.getenv("TEST_DB", "sqlite://:memory:")
+db_url_second = os.getenv("TEST_DB_SECOND", "sqlite://:memory:")
+tortoise_orm = {
+    "connections": {
+        "default": expand_db_url(db_url, True),
+        "second": expand_db_url(db_url_second, True),
+    },
+    "apps": {
+        "models": {
+            "models": ["tests.models", "aerich.models"],
+            "default_connection": "default",
+        },
+        "models_second": {"models": ["tests.models_second"], "default_connection": "second"},
+    },
+}


-@pytest.fixture(scope="module", autouse=True)
-def initialize_tests(request):
-    db_url = os.getenv("TEST_DB", "sqlite://:memory:")
-    initializer(["tests.models"], db_url=db_url)
-    request.addfinalizer(finalizer)
+@pytest.fixture(scope="function", autouse=True)
+def reset_migrate():
+    Migrate.upgrade_operators = []
+    Migrate.downgrade_operators = []
+    Migrate._upgrade_fk_m2m_index_operators = []
+    Migrate._downgrade_fk_m2m_index_operators = []
+    Migrate._upgrade_m2m = []
+    Migrate._downgrade_m2m = []
+
+
+@pytest.fixture(scope="session")
+def event_loop():
+    policy = asyncio.get_event_loop_policy()
+    res = policy.new_event_loop()
+    asyncio.set_event_loop(res)
+    res._close = res.close
+    res.close = lambda: None
+
+    yield res
+
+    res._close()
+
+
+@pytest.fixture(scope="session", autouse=True)
+async def initialize_tests(event_loop, request):
+    await Tortoise.init(config=tortoise_orm, _create_db=True)
+    await generate_schema_for_client(Tortoise.get_connection("default"), safe=True)
+
+    client = Tortoise.get_connection("default")
+    if client.schema_generator is MySQLSchemaGenerator:
+        Migrate.ddl = MysqlDDL(client)
+    elif client.schema_generator is SqliteSchemaGenerator:
+        Migrate.ddl = SqliteDDL(client)
+    elif client.schema_generator is AsyncpgSchemaGenerator:
+        Migrate.ddl = PostgresDDL(client)
+    Migrate.dialect = Migrate.ddl.DIALECT
+    request.addfinalizer(lambda: event_loop.run_until_complete(Tortoise._drop_databases()))
--- a/images/alipay.jpeg
+++ b/images/alipay.jpeg
--- a/images/wechatpay.jpeg
+++ b/images/wechatpay.jpeg
--- a/poetry.lock
+++ b/poetry.lock
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,32 +1,45 @@
 [tool.poetry]
 name = "aerich"
-version = "0.1.1"
+version = "0.5.0"
 description = "A database migrations tool for Tortoise ORM."
 authors = ["long2ice <long2ice@gmail.com>"]
+license = "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" }
+]
+include = ["CHANGELOG.md", "LICENSE", "README.md"]

 [tool.poetry.dependencies]
-python = "^3.8"
-tortoise-orm = {git = "https://github.com/long2ice/tortoise-orm.git", branch = "develop"}
-asyncclick = "*"
+python = "^3.7"
+tortoise-orm = "^0.16.21"
+click = "*"
 pydantic = "*"
+aiomysql = { version = "*", optional = true }
+asyncpg = { version = "*", optional = true }
+ddlparse = "*"
+dictdiffer = "*"

 [tool.poetry.dev-dependencies]
-taskipy = "*"
-asynctest = "*"
 flake8 = "*"
 isort = "*"
-black = "^19.10b0"
+black = "^20.8b1"
 pytest = "*"
-aiomysql = "*"
-asyncpg = "*"
 pytest-xdist = "*"
-mypy = "*"
+pytest-asyncio = "*"
+bandit = "*"
+pytest-mock = "*"

-[tool.taskipy.tasks]
-export = "poetry export -f requirements.txt --without-hashes > requirements.txt"
-export-dev = "poetry export -f requirements.txt --dev --without-hashes > requirements-dev.txt"
+[tool.poetry.extras]
+dbdrivers = ["aiomysql", "asyncpg"]

 [build-system]
 requires = ["poetry>=0.12"]
 build-backend = "poetry.masonry.api"

+[tool.poetry.scripts]
+aerich = "aerich.cli:main"
--- a/pytest.ini
+++ b/pytest.ini
@@ -1,2 +0,0 @@
-[pytest]
-addopts = -p no:warnings --ignore=src
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,48 +0,0 @@
-aiomysql==0.0.20
-aiosqlite==0.13.0
-anyio==1.3.0
-apipkg==1.5
-appdirs==1.4.4
-async-generator==1.10
-asyncclick==7.0.9
-asyncpg==0.20.1
-asynctest==0.13.0
-atomicwrites==1.4.0; sys_platform == "win32"
-attrs==19.3.0
-black==19.10b0
-cffi==1.14.0
-ciso8601==2.1.3; sys_platform != "win32" and implementation_name == "cpython"
-click==7.1.2
-colorama==0.4.3; sys_platform == "win32"
-cryptography==2.9.2
-execnet==1.7.1
-flake8==3.8.1
-iso8601==0.1.12; sys_platform == "win32" or implementation_name != "cpython"
-isort==4.3.21
-mccabe==0.6.1
-more-itertools==8.3.0
-mypy==0.770
-mypy-extensions==0.4.3
-packaging==20.4
-pathspec==0.8.0
-pluggy==0.13.1
-py==1.8.1
-pycodestyle==2.6.0
-pycparser==2.20
-pydantic==1.5.1
-pyflakes==2.2.0
-pymysql==0.9.2
-pyparsing==2.4.7
-pypika==0.37.6
-pytest==5.4.2
-pytest-forked==1.1.3
-pytest-xdist==1.32.0
-regex==2020.5.14
-six==1.14.0
-sniffio==1.1.0
-taskipy==1.2.1
-toml==0.10.1
-e git+https://github.com/long2ice/tortoise-orm.git@1f67b7a0ca1384365d6ff89d9e245e733166d1a6#egg=tortoise-orm
-typed-ast==1.4.1
-typing-extensions==3.7.4.2
-wcwidth==0.1.9
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,10 +0,0 @@
-aiosqlite==0.13.0
-anyio==1.3.0
-async-generator==1.10
-asyncclick==7.0.9
-ciso8601==2.1.3; sys_platform != "win32" and implementation_name == "cpython"
-iso8601==0.1.12; sys_platform == "win32" or implementation_name != "cpython"
-pydantic==1.5.1
-pypika==0.37.6
-sniffio==1.1.0
-typing-extensions==3.7.4.2
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,47 +1,2 @@
 [flake8]
-max-line-length = 100
-exclude =
-ignore = E501,W503,DAR101,DAR201,DAR402
-
-[darglint]
-docstring_style=sphinx
-
-[isort]
-not_skip=__init__.py
-multi_line_output=3
-include_trailing_comma=True
-force_grid_wrap=0
-use_parentheses=True
-line_length=100
-
-[tool:pytest]
-addopts = -n auto --tb=native -q
-
-[mypy]
-pretty = True
-ignore_missing_imports = True
-check_untyped_defs = True
-disallow_subclassing_any = True
-disallow_untyped_calls = True
-disallow_untyped_defs = False
-disallow_incomplete_defs = False
-disallow_untyped_decorators = True
-no_implicit_optional = True
-warn_redundant_casts = True
-warn_unused_ignores = True
-warn_no_return = True
-warn_return_any = False
-warn_unused_configs = True
-warn_unreachable = True
-allow_redefinition = True
-strict_equality = True
-show_error_context = True
-
-[mypy-tests.*]
-check_untyped_defs = False
-disallow_untyped_defs = False
-disallow_incomplete_defs = False
-warn_unreachable = False
-
-[mypy-conftest]
-disallow_untyped_defs = False
+ignore = E501,W503
--- a/setup.py
+++ b/setup.py
@@ -1,44 +0,0 @@
-import os
-import re
-from setuptools import find_packages, setup
-
-
-def version():
-    ver_str_line = open('aerich/__init__.py', 'rt').read()
-    mob = re.search(r"^__version__ = ['\"]([^'\"]*)['\"]", ver_str_line, re.M)
-    if not mob:
-        raise RuntimeError("Unable to find version string")
-    return mob.group(1)
-
-
-with open(os.path.join(os.path.dirname(__file__), 'README.rst')) as f:
-    long_description = f.read()
-
-
-def requirements():
-    return open('requirements.txt', 'rt').read().splitlines()
-
-
-setup(
-    name='aerich',
-    version=version(),
-    description='A database migrations tool for Tortoise-ORM.',
-    author='long2ice',
-    long_description_content_type='text/x-rst',
-    long_description=long_description,
-    author_email='long2ice@gmail.com',
-    url='https://github.com/long2ice/aerich',
-    license='MIT License',
-    packages=find_packages(include=['aerich*']),
-    include_package_data=True,
-    zip_safe=True,
-    entry_points={
-        'console_scripts': ['aerich = aerich.cli:main'],
-    },
-    platforms='any',
-    keywords=(
-        'migrate Tortoise-ORM mysql'
-    ),
-    dependency_links=['https://github.com/long2ice/tortoise-orm.git@develop#egg=tortoise-orm'],
-    install_requires=requirements(),
-)
--- a/tests/init.py
+++ b/tests/init.py
@@ -1,6 +0,0 @@
-TORTOISE_ORM = {
-    "connections": {"default": "mysql://root:123456@127.0.0.1:3306/test"},
-    "apps": {
-        "models": {"models": ["tests.models", "aerich.models"], "default_connection": "default"}
-    },
-}
--- a/tests/models.py
+++ b/tests/models.py
@@ -23,14 +23,21 @@ 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="")


+class Email(Model):
+    email_id = fields.IntField(pk=True)
+    email = fields.CharField(max_length=200, index=True)
+    is_primary = fields.BooleanField(default=False)
+    address = fields.CharField(max_length=200)
+    users = fields.ManyToManyField("models.User")
+
+
 class Category(Model):
    slug = fields.CharField(max_length=200)
    name = fields.CharField(max_length=200)
@@ -41,17 +48,21 @@ class Category(Model):
 class Product(Model):
    categories = fields.ManyToManyField("models.Category")
    name = fields.CharField(max_length=50)
-    view_num = fields.IntField(description="View Num")
+    view_num = fields.IntField(description="View Num", default=0)
    sort = fields.IntField()
    is_reviewed = fields.BooleanField(description="Is Reviewed")
    type = fields.IntEnumField(ProductType, description="Product Type")
-    image = fields.CharField(max_length=200)
+    pic = fields.CharField(max_length=200)
    body = fields.TextField()
    created_at = fields.DatetimeField(auto_now_add=True)

+    class Meta:
+        unique_together = (("name", "type"),)
+

 class Config(Model):
    label = fields.CharField(max_length=200)
    key = fields.CharField(max_length=20)
    value = fields.JSONField()
-    status: Status = fields.IntEnumField(Status, default=Status.on)
+    status: Status = fields.IntEnumField(Status)
+    user = fields.ForeignKeyField("models.User", description="User")
--- a/tests/models_second.py
+++ b/tests/models_second.py
@@ -0,0 +1,63 @@
+import datetime
+from enum import IntEnum
+
+from tortoise import Model, fields
+
+
+class ProductType(IntEnum):
+    article = 1
+    page = 2
+
+
+class PermissionAction(IntEnum):
+    create = 1
+    delete = 2
+    update = 3
+    read = 4
+
+
+class Status(IntEnum):
+    on = 1
+    off = 0
+
+
+class User(Model):
+    username = fields.CharField(max_length=20, unique=True)
+    password = fields.CharField(max_length=200)
+    last_login = fields.DatetimeField(description="Last Login", default=datetime.datetime.now)
+    is_active = fields.BooleanField(default=True, description="Is Active")
+    is_superuser = fields.BooleanField(default=False, description="Is SuperUser")
+    avatar = fields.CharField(max_length=200, default="")
+    intro = fields.TextField(default="")
+
+
+class Email(Model):
+    email = fields.CharField(max_length=200)
+    is_primary = fields.BooleanField(default=False)
+    user = fields.ForeignKeyField("models_second.User", db_constraint=False)
+
+
+class Category(Model):
+    slug = fields.CharField(max_length=200)
+    name = fields.CharField(max_length=200)
+    user = fields.ForeignKeyField("models_second.User", description="User")
+    created_at = fields.DatetimeField(auto_now_add=True)
+
+
+class Product(Model):
+    categories = fields.ManyToManyField("models_second.Category")
+    name = fields.CharField(max_length=50)
+    view_num = fields.IntField(description="View Num")
+    sort = fields.IntField()
+    is_reviewed = fields.BooleanField(description="Is Reviewed")
+    type = fields.IntEnumField(ProductType, description="Product Type")
+    image = fields.CharField(max_length=200)
+    body = fields.TextField()
+    created_at = fields.DatetimeField(auto_now_add=True)
+
+
+class Config(Model):
+    label = fields.CharField(max_length=200)
+    key = fields.CharField(max_length=20)
+    value = fields.JSONField()
+    status: Status = fields.IntEnumField(Status, default=Status.on)
--- a/tests/old_models.py
+++ b/tests/old_models.py
@@ -0,0 +1,63 @@
+import datetime
+from enum import IntEnum
+
+from tortoise import Model, fields
+
+
+class ProductType(IntEnum):
+    article = 1
+    page = 2
+
+
+class PermissionAction(IntEnum):
+    create = 1
+    delete = 2
+    update = 3
+    read = 4
+
+
+class Status(IntEnum):
+    on = 1
+    off = 0
+
+
+class User(Model):
+    username = fields.CharField(max_length=20)
+    password = fields.CharField(max_length=200)
+    last_login = fields.DatetimeField(description="Last Login", default=datetime.datetime.now)
+    is_active = fields.BooleanField(default=True, description="Is Active")
+    is_superuser = fields.BooleanField(default=False, description="Is SuperUser")
+    avatar = fields.CharField(max_length=200, default="")
+    intro = fields.TextField(default="")
+
+
+class Email(Model):
+    email = fields.CharField(max_length=200)
+    is_primary = fields.BooleanField(default=False)
+    user = fields.ForeignKeyField("models.User", db_constraint=False)
+
+
+class Category(Model):
+    slug = fields.CharField(max_length=200)
+    name = fields.CharField(max_length=200)
+    user = fields.ForeignKeyField("models.User", description="User")
+    created_at = fields.DatetimeField(auto_now_add=True)
+
+
+class Product(Model):
+    categories = fields.ManyToManyField("models.Category")
+    name = fields.CharField(max_length=50)
+    view_num = fields.IntField(description="View Num")
+    sort = fields.IntField()
+    is_reviewed = fields.BooleanField(description="Is Reviewed")
+    type = fields.IntEnumField(ProductType, description="Product Type")
+    image = fields.CharField(max_length=200)
+    body = fields.TextField()
+    created_at = fields.DatetimeField(auto_now_add=True)
+
+
+class Config(Model):
+    label = fields.CharField(max_length=200)
+    key = fields.CharField(max_length=20)
+    value = fields.JSONField()
+    status: Status = fields.IntEnumField(Status, default=Status.on)
--- a/tests/test_ddl.py
+++ b/tests/test_ddl.py
@@ -1,114 +1,212 @@
-from tortoise import Tortoise
-from tortoise.backends.asyncpg.schema_generator import AsyncpgSchemaGenerator
-from tortoise.backends.mysql.schema_generator import MySQLSchemaGenerator
-from tortoise.backends.sqlite.schema_generator import SqliteSchemaGenerator
-from tortoise.contrib import test
+import pytest

 from aerich.ddl.mysql import MysqlDDL
 from aerich.ddl.postgres import PostgresDDL
 from aerich.ddl.sqlite import SqliteDDL
-from tests.models import Category
+from aerich.exceptions import NotSupportError
+from aerich.migrate import Migrate
+from tests.models import Category, Product, User


-class TestDDL(test.TruncationTestCase):
-    maxDiff = None
-
-    def setUp(self) -> None:
-        client = Tortoise.get_connection("models")
-        if client.schema_generator is MySQLSchemaGenerator:
-            self.ddl = MysqlDDL(client)
-        elif client.schema_generator is SqliteSchemaGenerator:
-            self.ddl = SqliteDDL(client)
-        elif client.schema_generator is AsyncpgSchemaGenerator:
-            self.ddl = PostgresDDL(client)
-
-    def test_create_table(self):
-        ret = self.ddl.create_table(Category)
-        if isinstance(self.ddl, MysqlDDL):
-            self.assertEqual(
-                ret,
-                """CREATE TABLE IF NOT EXISTS `category` (
+def test_create_table():
+    ret = Migrate.ddl.create_table(Category)
+    if isinstance(Migrate.ddl, MysqlDDL):
+        assert (
+            ret
+            == """CREATE TABLE IF NOT EXISTS `category` (
    `id` INT NOT NULL PRIMARY KEY AUTO_INCREMENT,
    `slug` VARCHAR(200) NOT NULL,
    `name` VARCHAR(200) NOT NULL,
    `created_at` DATETIME(6) NOT NULL  DEFAULT CURRENT_TIMESTAMP(6),
    `user_id` INT NOT NULL COMMENT 'User',
    CONSTRAINT `fk_category_user_e2e3874c` FOREIGN KEY (`user_id`) REFERENCES `user` (`id`) ON DELETE CASCADE
-) CHARACTER SET utf8mb4;""",
-            )
-        elif isinstance(self.ddl, SqliteDDL):
-            self.assertEqual(
-                ret,
-                """CREATE TABLE IF NOT EXISTS "category" (
+) CHARACTER SET utf8mb4;"""
+        )
+
+    elif isinstance(Migrate.ddl, SqliteDDL):
+        assert (
+            ret
+            == """CREATE TABLE IF NOT EXISTS "category" (
    "id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
    "slug" VARCHAR(200) NOT NULL,
    "name" VARCHAR(200) NOT NULL,
    "created_at" TIMESTAMP NOT NULL  DEFAULT CURRENT_TIMESTAMP,
    "user_id" INT NOT NULL REFERENCES "user" ("id") ON DELETE CASCADE /* User */
-);""",
-            )
-        elif isinstance(self.ddl, PostgresDDL):
-            self.assertEqual(
-                ret,
-                """CREATE TABLE IF NOT EXISTS "category" (
+);"""
+        )
+
+    elif isinstance(Migrate.ddl, PostgresDDL):
+        assert (
+            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,
+    "created_at" TIMESTAMPTZ NOT NULL  DEFAULT CURRENT_TIMESTAMP,
    "user_id" INT NOT NULL REFERENCES "user" ("id") ON DELETE CASCADE
 );
-COMMENT ON COLUMN "category"."user_id" IS 'User';""",
-            )
-
-    def test_drop_table(self):
-        ret = self.ddl.drop_table(Category)
-        self.assertEqual(ret, "DROP TABLE IF EXISTS category")
-
-    def test_add_column(self):
-        ret = self.ddl.add_column(Category, Category._meta.fields_map.get("name"))
-        if isinstance(self.ddl, MysqlDDL):
-            self.assertEqual(ret, "ALTER TABLE category ADD `name` VARCHAR(200) NOT NULL")
-        elif isinstance(self.ddl, PostgresDDL):
-            self.assertEqual(ret, 'ALTER TABLE category ADD "name" VARCHAR(200) NOT NULL')
-        elif isinstance(self.ddl, SqliteDDL):
-            self.assertEqual(ret, 'ALTER TABLE category ADD "name" VARCHAR(200) NOT NULL')
-
-    def test_drop_column(self):
-        ret = self.ddl.drop_column(Category, "name")
-        self.assertEqual(ret, "ALTER TABLE category DROP COLUMN name")
-        self.assertEqual(ret, "ALTER TABLE category DROP COLUMN name")
-
-    def test_add_index(self):
-        index = self.ddl.add_index(Category, ["name"])
-        index_u = self.ddl.add_index(Category, ["name"], True)
-        if isinstance(self.ddl, MysqlDDL):
-            self.assertEqual(
-                index, "ALTER TABLE category ADD  INDEX idx_category_name_8b0cb9 (`name`)"
-            )
-            self.assertEqual(
-                index_u, "ALTER TABLE category ADD UNIQUE INDEX uid_category_name_8b0cb9 (`name`)"
-            )
-        elif isinstance(self.ddl, SqliteDDL):
-            self.assertEqual(
-                index_u, 'ALTER TABLE category ADD UNIQUE INDEX uid_category_name_8b0cb9 ("name")'
-            )
-            self.assertEqual(
-                index_u, 'ALTER TABLE category ADD UNIQUE INDEX uid_category_name_8b0cb9 ("name")'
-            )
-
-    def test_drop_index(self):
-        ret = self.ddl.drop_index(Category, ["name"])
-        self.assertEqual(ret, "ALTER TABLE category DROP INDEX idx_category_name_8b0cb9")
-        ret = self.ddl.drop_index(Category, ["name"], True)
-        self.assertEqual(ret, "ALTER TABLE category DROP INDEX uid_category_name_8b0cb9")
-
-    def test_add_fk(self):
-        ret = self.ddl.add_fk(Category, Category._meta.fields_map.get("user"))
-        self.assertEqual(
-            ret,
-            "ALTER TABLE category ADD CONSTRAINT `fk_category_user_e2e3874c` FOREIGN KEY (`user_id`) REFERENCES `user` (`id`) ON DELETE CASCADE",
+COMMENT ON COLUMN "category"."user_id" IS 'User';"""
        )

-    def test_drop_fk(self):
-        ret = self.ddl.drop_fk(Category, Category._meta.fields_map.get("user"))
-        self.assertEqual(ret, "ALTER TABLE category DROP FOREIGN KEY fk_category_user_e2e3874c")
+
+def test_drop_table():
+    ret = Migrate.ddl.drop_table(Category._meta.db_table)
+    if isinstance(Migrate.ddl, MysqlDDL):
+        assert ret == "DROP TABLE IF EXISTS `category`"
+    else:
+        assert ret == 'DROP TABLE IF EXISTS "category"'
+
+
+def test_add_column():
+    ret = Migrate.ddl.add_column(Category, Category._meta.fields_map.get("name").describe(False))
+    if isinstance(Migrate.ddl, MysqlDDL):
+        assert ret == "ALTER TABLE `category` ADD `name` VARCHAR(200) NOT NULL"
+    else:
+        assert ret == 'ALTER TABLE "category" ADD "name" VARCHAR(200) NOT NULL'
+
+
+def test_modify_column():
+    if isinstance(Migrate.ddl, SqliteDDL):
+        return
+
+    ret0 = Migrate.ddl.modify_column(
+        Category, Category._meta.fields_map.get("name").describe(False)
+    )
+    ret1 = Migrate.ddl.modify_column(User, User._meta.fields_map.get("is_active").describe(False))
+    if isinstance(Migrate.ddl, MysqlDDL):
+        assert ret0 == "ALTER TABLE `category` MODIFY COLUMN `name` VARCHAR(200) NOT NULL"
+    elif isinstance(Migrate.ddl, PostgresDDL):
+        assert ret0 == 'ALTER TABLE "category" ALTER COLUMN "name" TYPE VARCHAR(200)'
+
+    if isinstance(Migrate.ddl, MysqlDDL):
+        assert (
+            ret1
+            == "ALTER TABLE `user` MODIFY COLUMN `is_active` BOOL NOT NULL  COMMENT 'Is Active' DEFAULT 1"
+        )
+    elif isinstance(Migrate.ddl, PostgresDDL):
+        assert ret1 == 'ALTER TABLE "user" ALTER COLUMN "is_active" TYPE BOOL'
+
+
+def test_alter_column_default():
+    if isinstance(Migrate.ddl, SqliteDDL):
+        return
+    ret = Migrate.ddl.alter_column_default(
+        Category, Category._meta.fields_map.get("name").describe(False)
+    )
+    if isinstance(Migrate.ddl, PostgresDDL):
+        assert ret == 'ALTER TABLE "category" ALTER COLUMN "name" DROP DEFAULT'
+    elif isinstance(Migrate.ddl, MysqlDDL):
+        assert ret == "ALTER TABLE `category` ALTER COLUMN `name` DROP DEFAULT"
+
+    ret = Migrate.ddl.alter_column_default(
+        Category, Category._meta.fields_map.get("created_at").describe(False)
+    )
+    if isinstance(Migrate.ddl, PostgresDDL):
+        assert (
+            ret == 'ALTER TABLE "category" ALTER COLUMN "created_at" SET DEFAULT CURRENT_TIMESTAMP'
+        )
+    elif isinstance(Migrate.ddl, MysqlDDL):
+        assert (
+            ret
+            == "ALTER TABLE `category` ALTER COLUMN `created_at` SET DEFAULT CURRENT_TIMESTAMP(6)"
+        )
+
+    ret = Migrate.ddl.alter_column_default(
+        Product, Product._meta.fields_map.get("view_num").describe(False)
+    )
+    if isinstance(Migrate.ddl, PostgresDDL):
+        assert ret == 'ALTER TABLE "product" ALTER COLUMN "view_num" SET DEFAULT 0'
+    elif isinstance(Migrate.ddl, MysqlDDL):
+        assert ret == "ALTER TABLE `product` ALTER COLUMN `view_num` SET DEFAULT 0"
+
+
+def test_alter_column_null():
+    if isinstance(Migrate.ddl, (SqliteDDL, MysqlDDL)):
+        return
+    ret = Migrate.ddl.alter_column_null(
+        Category, Category._meta.fields_map.get("name").describe(False)
+    )
+    if isinstance(Migrate.ddl, PostgresDDL):
+        assert ret == 'ALTER TABLE "category" ALTER COLUMN "name" SET NOT NULL'
+
+
+def test_set_comment():
+    if isinstance(Migrate.ddl, (SqliteDDL, MysqlDDL)):
+        return
+    ret = Migrate.ddl.set_comment(Category, Category._meta.fields_map.get("name").describe(False))
+    assert ret == 'COMMENT ON COLUMN "category"."name" IS NULL'
+
+    ret = Migrate.ddl.set_comment(Category, Category._meta.fields_map.get("user").describe(False))
+    assert ret == 'COMMENT ON COLUMN "category"."user_id" IS \'User\''
+
+
+def test_drop_column():
+    if isinstance(Migrate.ddl, SqliteDDL):
+        with pytest.raises(NotSupportError):
+            ret = Migrate.ddl.drop_column(Category, "name")
+    else:
+        ret = Migrate.ddl.drop_column(Category, "name")
+    if isinstance(Migrate.ddl, MysqlDDL):
+        assert ret == "ALTER TABLE `category` DROP COLUMN `name`"
+    elif isinstance(Migrate.ddl, PostgresDDL):
+        assert ret == 'ALTER TABLE "category" DROP COLUMN "name"'
+
+
+def test_add_index():
+    index = Migrate.ddl.add_index(Category, ["name"])
+    index_u = Migrate.ddl.add_index(Category, ["name"], True)
+    if isinstance(Migrate.ddl, MysqlDDL):
+        assert index == "ALTER TABLE `category` ADD INDEX `idx_category_name_8b0cb9` (`name`)"
+        assert (
+            index_u == "ALTER TABLE `category` ADD UNIQUE INDEX `uid_category_name_8b0cb9` (`name`)"
+        )
+    elif isinstance(Migrate.ddl, PostgresDDL):
+        assert index == 'CREATE INDEX "idx_category_name_8b0cb9" ON "category" ("name")'
+        assert index_u == 'CREATE UNIQUE INDEX "uid_category_name_8b0cb9" ON "category" ("name")'
+    else:
+        assert index == 'ALTER TABLE "category" ADD INDEX "idx_category_name_8b0cb9" ("name")'
+        assert (
+            index_u == 'ALTER TABLE "category" ADD UNIQUE INDEX "uid_category_name_8b0cb9" ("name")'
+        )
+
+
+def test_drop_index():
+    ret = Migrate.ddl.drop_index(Category, ["name"])
+    ret_u = Migrate.ddl.drop_index(Category, ["name"], True)
+    if isinstance(Migrate.ddl, MysqlDDL):
+        assert ret == "ALTER TABLE `category` DROP INDEX `idx_category_name_8b0cb9`"
+        assert ret_u == "ALTER TABLE `category` DROP INDEX `uid_category_name_8b0cb9`"
+    elif isinstance(Migrate.ddl, PostgresDDL):
+        assert ret == 'DROP INDEX "idx_category_name_8b0cb9"'
+        assert ret_u == 'DROP INDEX "uid_category_name_8b0cb9"'
+    else:
+        assert ret == 'ALTER TABLE "category" DROP INDEX "idx_category_name_8b0cb9"'
+        assert ret_u == 'ALTER TABLE "category" DROP INDEX "uid_category_name_8b0cb9"'
+
+
+def test_add_fk():
+    ret = Migrate.ddl.add_fk(
+        Category, Category._meta.fields_map.get("user").describe(False), User.describe(False)
+    )
+    if isinstance(Migrate.ddl, MysqlDDL):
+        assert (
+            ret
+            == "ALTER TABLE `category` ADD CONSTRAINT `fk_category_user_e2e3874c` FOREIGN KEY (`user_id`) REFERENCES `user` (`id`) ON DELETE CASCADE"
+        )
+    else:
+        assert (
+            ret
+            == 'ALTER TABLE "category" ADD CONSTRAINT "fk_category_user_e2e3874c" FOREIGN KEY ("user_id") REFERENCES "user" ("id") ON DELETE CASCADE'
+        )
+
+
+def test_drop_fk():
+    ret = Migrate.ddl.drop_fk(
+        Category, Category._meta.fields_map.get("user").describe(False), User.describe(False)
+    )
+    if isinstance(Migrate.ddl, MysqlDDL):
+        assert ret == "ALTER TABLE `category` DROP FOREIGN KEY `fk_category_user_e2e3874c`"
+    elif isinstance(Migrate.ddl, PostgresDDL):
+        assert ret == 'ALTER TABLE "category" DROP CONSTRAINT "fk_category_user_e2e3874c"'
+    else:
+        assert ret == 'ALTER TABLE "category" DROP FOREIGN KEY "fk_category_user_e2e3874c"'
--- a/tests/test_migrate.py
+++ b/tests/test_migrate.py
@@ -0,0 +1,890 @@
+import pytest
+from pytest_mock import MockerFixture
+
+from aerich.ddl.mysql import MysqlDDL
+from aerich.ddl.postgres import PostgresDDL
+from aerich.ddl.sqlite import SqliteDDL
+from aerich.exceptions import NotSupportError
+from aerich.migrate import Migrate
+from aerich.utils import get_models_describe
+
+old_models_describe = {
+    "models.Category": {
+        "name": "models.Category",
+        "app": "models",
+        "table": "category",
+        "abstract": False,
+        "description": None,
+        "docstring": None,
+        "unique_together": [],
+        "pk_field": {
+            "name": "id",
+            "field_type": "IntField",
+            "db_column": "id",
+            "python_type": "int",
+            "generated": True,
+            "nullable": False,
+            "unique": True,
+            "indexed": True,
+            "default": None,
+            "description": None,
+            "docstring": None,
+            "constraints": {"ge": 1, "le": 2147483647},
+            "db_field_types": {"": "INT"},
+        },
+        "data_fields": [
+            {
+                "name": "slug",
+                "field_type": "CharField",
+                "db_column": "slug",
+                "python_type": "str",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"max_length": 200},
+                "db_field_types": {"": "VARCHAR(200)"},
+            },
+            {
+                "name": "name",
+                "field_type": "CharField",
+                "db_column": "name",
+                "python_type": "str",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"max_length": 200},
+                "db_field_types": {"": "VARCHAR(200)"},
+            },
+            {
+                "name": "created_at",
+                "field_type": "DatetimeField",
+                "db_column": "created_at",
+                "python_type": "datetime.datetime",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"readOnly": True},
+                "db_field_types": {
+                    "": "TIMESTAMP",
+                    "mysql": "DATETIME(6)",
+                    "postgres": "TIMESTAMPTZ",
+                },
+                "auto_now_add": True,
+                "auto_now": False,
+            },
+            {
+                "name": "user_id",
+                "field_type": "IntField",
+                "db_column": "user_id",
+                "python_type": "int",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": "User",
+                "docstring": None,
+                "constraints": {"ge": 1, "le": 2147483647},
+                "db_field_types": {"": "INT"},
+            },
+        ],
+        "fk_fields": [
+            {
+                "name": "user",
+                "field_type": "ForeignKeyFieldInstance",
+                "python_type": "models.User",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": "User",
+                "docstring": None,
+                "constraints": {},
+                "raw_field": "user_id",
+                "on_delete": "CASCADE",
+            }
+        ],
+        "backward_fk_fields": [],
+        "o2o_fields": [],
+        "backward_o2o_fields": [],
+        "m2m_fields": [
+            {
+                "name": "products",
+                "field_type": "ManyToManyFieldInstance",
+                "python_type": "models.Product",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {},
+                "model_name": "models.Product",
+                "related_name": "categories",
+                "forward_key": "product_id",
+                "backward_key": "category_id",
+                "through": "product_category",
+                "on_delete": "CASCADE",
+                "_generated": True,
+            }
+        ],
+    },
+    "models.Config": {
+        "name": "models.Config",
+        "app": "models",
+        "table": "config",
+        "abstract": False,
+        "description": None,
+        "docstring": None,
+        "unique_together": [],
+        "pk_field": {
+            "name": "id",
+            "field_type": "IntField",
+            "db_column": "id",
+            "python_type": "int",
+            "generated": True,
+            "nullable": False,
+            "unique": True,
+            "indexed": True,
+            "default": None,
+            "description": None,
+            "docstring": None,
+            "constraints": {"ge": 1, "le": 2147483647},
+            "db_field_types": {"": "INT"},
+        },
+        "data_fields": [
+            {
+                "name": "label",
+                "field_type": "CharField",
+                "db_column": "label",
+                "python_type": "str",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"max_length": 200},
+                "db_field_types": {"": "VARCHAR(200)"},
+            },
+            {
+                "name": "key",
+                "field_type": "CharField",
+                "db_column": "key",
+                "python_type": "str",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"max_length": 20},
+                "db_field_types": {"": "VARCHAR(20)"},
+            },
+            {
+                "name": "value",
+                "field_type": "JSONField",
+                "db_column": "value",
+                "python_type": "Union[dict, list]",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {},
+                "db_field_types": {"": "TEXT", "postgres": "JSONB"},
+            },
+            {
+                "name": "status",
+                "field_type": "IntEnumFieldInstance",
+                "db_column": "status",
+                "python_type": "int",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": 1,
+                "description": "on: 1\noff: 0",
+                "docstring": None,
+                "constraints": {"ge": -32768, "le": 32767},
+                "db_field_types": {"": "SMALLINT"},
+            },
+        ],
+        "fk_fields": [],
+        "backward_fk_fields": [],
+        "o2o_fields": [],
+        "backward_o2o_fields": [],
+        "m2m_fields": [],
+    },
+    "models.Email": {
+        "name": "models.Email",
+        "app": "models",
+        "table": "email",
+        "abstract": False,
+        "description": None,
+        "docstring": None,
+        "unique_together": [],
+        "pk_field": {
+            "name": "id",
+            "field_type": "IntField",
+            "db_column": "id",
+            "python_type": "int",
+            "generated": True,
+            "nullable": False,
+            "unique": True,
+            "indexed": True,
+            "default": None,
+            "description": None,
+            "docstring": None,
+            "constraints": {"ge": 1, "le": 2147483647},
+            "db_field_types": {"": "INT"},
+        },
+        "data_fields": [
+            {
+                "name": "email",
+                "field_type": "CharField",
+                "db_column": "email",
+                "python_type": "str",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"max_length": 200},
+                "db_field_types": {"": "VARCHAR(200)"},
+            },
+            {
+                "name": "is_primary",
+                "field_type": "BooleanField",
+                "db_column": "is_primary",
+                "python_type": "bool",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": False,
+                "description": None,
+                "docstring": None,
+                "constraints": {},
+                "db_field_types": {"": "BOOL", "sqlite": "INT"},
+            },
+            {
+                "name": "user_id",
+                "field_type": "IntField",
+                "db_column": "user_id",
+                "python_type": "int",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"ge": 1, "le": 2147483647},
+                "db_field_types": {"": "INT"},
+            },
+        ],
+        "fk_fields": [
+            {
+                "name": "user",
+                "field_type": "ForeignKeyFieldInstance",
+                "python_type": "models.User",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {},
+                "raw_field": "user_id",
+                "on_delete": "CASCADE",
+            }
+        ],
+        "backward_fk_fields": [],
+        "o2o_fields": [],
+        "backward_o2o_fields": [],
+        "m2m_fields": [],
+    },
+    "models.Product": {
+        "name": "models.Product",
+        "app": "models",
+        "table": "product",
+        "abstract": False,
+        "description": None,
+        "docstring": None,
+        "unique_together": [],
+        "pk_field": {
+            "name": "id",
+            "field_type": "IntField",
+            "db_column": "id",
+            "python_type": "int",
+            "generated": True,
+            "nullable": False,
+            "unique": True,
+            "indexed": True,
+            "default": None,
+            "description": None,
+            "docstring": None,
+            "constraints": {"ge": 1, "le": 2147483647},
+            "db_field_types": {"": "INT"},
+        },
+        "data_fields": [
+            {
+                "name": "name",
+                "field_type": "CharField",
+                "db_column": "name",
+                "python_type": "str",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"max_length": 50},
+                "db_field_types": {"": "VARCHAR(50)"},
+            },
+            {
+                "name": "view_num",
+                "field_type": "IntField",
+                "db_column": "view_num",
+                "python_type": "int",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": "View Num",
+                "docstring": None,
+                "constraints": {"ge": -2147483648, "le": 2147483647},
+                "db_field_types": {"": "INT"},
+            },
+            {
+                "name": "sort",
+                "field_type": "IntField",
+                "db_column": "sort",
+                "python_type": "int",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"ge": -2147483648, "le": 2147483647},
+                "db_field_types": {"": "INT"},
+            },
+            {
+                "name": "is_reviewed",
+                "field_type": "BooleanField",
+                "db_column": "is_reviewed",
+                "python_type": "bool",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": "Is Reviewed",
+                "docstring": None,
+                "constraints": {},
+                "db_field_types": {"": "BOOL", "sqlite": "INT"},
+            },
+            {
+                "name": "type",
+                "field_type": "IntEnumFieldInstance",
+                "db_column": "type",
+                "python_type": "int",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": "Product Type",
+                "docstring": None,
+                "constraints": {"ge": -32768, "le": 32767},
+                "db_field_types": {"": "SMALLINT"},
+            },
+            {
+                "name": "image",
+                "field_type": "CharField",
+                "db_column": "image",
+                "python_type": "str",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"max_length": 200},
+                "db_field_types": {"": "VARCHAR(200)"},
+            },
+            {
+                "name": "body",
+                "field_type": "TextField",
+                "db_column": "body",
+                "python_type": "str",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {},
+                "db_field_types": {"": "TEXT", "mysql": "LONGTEXT"},
+            },
+            {
+                "name": "created_at",
+                "field_type": "DatetimeField",
+                "db_column": "created_at",
+                "python_type": "datetime.datetime",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"readOnly": True},
+                "db_field_types": {
+                    "": "TIMESTAMP",
+                    "mysql": "DATETIME(6)",
+                    "postgres": "TIMESTAMPTZ",
+                },
+                "auto_now_add": True,
+                "auto_now": False,
+            },
+        ],
+        "fk_fields": [],
+        "backward_fk_fields": [],
+        "o2o_fields": [],
+        "backward_o2o_fields": [],
+        "m2m_fields": [
+            {
+                "name": "categories",
+                "field_type": "ManyToManyFieldInstance",
+                "python_type": "models.Category",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {},
+                "model_name": "models.Category",
+                "related_name": "products",
+                "forward_key": "category_id",
+                "backward_key": "product_id",
+                "through": "product_category",
+                "on_delete": "CASCADE",
+                "_generated": False,
+            }
+        ],
+    },
+    "models.User": {
+        "name": "models.User",
+        "app": "models",
+        "table": "user",
+        "abstract": False,
+        "description": None,
+        "docstring": None,
+        "unique_together": [],
+        "pk_field": {
+            "name": "id",
+            "field_type": "IntField",
+            "db_column": "id",
+            "python_type": "int",
+            "generated": True,
+            "nullable": False,
+            "unique": True,
+            "indexed": True,
+            "default": None,
+            "description": None,
+            "docstring": None,
+            "constraints": {"ge": 1, "le": 2147483647},
+            "db_field_types": {"": "INT"},
+        },
+        "data_fields": [
+            {
+                "name": "username",
+                "field_type": "CharField",
+                "db_column": "username",
+                "python_type": "str",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"max_length": 20},
+                "db_field_types": {"": "VARCHAR(20)"},
+            },
+            {
+                "name": "password",
+                "field_type": "CharField",
+                "db_column": "password",
+                "python_type": "str",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"max_length": 200},
+                "db_field_types": {"": "VARCHAR(200)"},
+            },
+            {
+                "name": "last_login",
+                "field_type": "DatetimeField",
+                "db_column": "last_login",
+                "python_type": "datetime.datetime",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": "<function None.now>",
+                "description": "Last Login",
+                "docstring": None,
+                "constraints": {},
+                "db_field_types": {
+                    "": "TIMESTAMP",
+                    "mysql": "DATETIME(6)",
+                    "postgres": "TIMESTAMPTZ",
+                },
+                "auto_now_add": False,
+                "auto_now": False,
+            },
+            {
+                "name": "is_active",
+                "field_type": "BooleanField",
+                "db_column": "is_active",
+                "python_type": "bool",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": True,
+                "description": "Is Active",
+                "docstring": None,
+                "constraints": {},
+                "db_field_types": {"": "BOOL", "sqlite": "INT"},
+            },
+            {
+                "name": "is_superuser",
+                "field_type": "BooleanField",
+                "db_column": "is_superuser",
+                "python_type": "bool",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": False,
+                "description": "Is SuperUser",
+                "docstring": None,
+                "constraints": {},
+                "db_field_types": {"": "BOOL", "sqlite": "INT"},
+            },
+            {
+                "name": "avatar",
+                "field_type": "CharField",
+                "db_column": "avatar",
+                "python_type": "str",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": "",
+                "description": None,
+                "docstring": None,
+                "constraints": {"max_length": 200},
+                "db_field_types": {"": "VARCHAR(200)"},
+            },
+            {
+                "name": "intro",
+                "field_type": "TextField",
+                "db_column": "intro",
+                "python_type": "str",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": "",
+                "description": None,
+                "docstring": None,
+                "constraints": {},
+                "db_field_types": {"": "TEXT", "mysql": "LONGTEXT"},
+            },
+        ],
+        "fk_fields": [],
+        "backward_fk_fields": [
+            {
+                "name": "categorys",
+                "field_type": "BackwardFKRelation",
+                "python_type": "models.Category",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": "User",
+                "docstring": None,
+                "constraints": {},
+            },
+            {
+                "name": "emails",
+                "field_type": "BackwardFKRelation",
+                "python_type": "models.Email",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {},
+            },
+        ],
+        "o2o_fields": [],
+        "backward_o2o_fields": [],
+        "m2m_fields": [],
+    },
+    "models.Aerich": {
+        "name": "models.Aerich",
+        "app": "models",
+        "table": "aerich",
+        "abstract": False,
+        "description": None,
+        "docstring": None,
+        "unique_together": [],
+        "pk_field": {
+            "name": "id",
+            "field_type": "IntField",
+            "db_column": "id",
+            "python_type": "int",
+            "generated": True,
+            "nullable": False,
+            "unique": True,
+            "indexed": True,
+            "default": None,
+            "description": None,
+            "docstring": None,
+            "constraints": {"ge": 1, "le": 2147483647},
+            "db_field_types": {"": "INT"},
+        },
+        "data_fields": [
+            {
+                "name": "version",
+                "field_type": "CharField",
+                "db_column": "version",
+                "python_type": "str",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"max_length": 255},
+                "db_field_types": {"": "VARCHAR(255)"},
+            },
+            {
+                "name": "app",
+                "field_type": "CharField",
+                "db_column": "app",
+                "python_type": "str",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"max_length": 20},
+                "db_field_types": {"": "VARCHAR(20)"},
+            },
+            {
+                "name": "content",
+                "field_type": "JSONField",
+                "db_column": "content",
+                "python_type": "Union[dict, list]",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {},
+                "db_field_types": {"": "TEXT", "postgres": "JSONB"},
+            },
+        ],
+        "fk_fields": [],
+        "backward_fk_fields": [],
+        "o2o_fields": [],
+        "backward_o2o_fields": [],
+        "m2m_fields": [],
+    },
+}
+
+
+def test_migrate(mocker: MockerFixture):
+    """
+    models.py diff with old_models.py
+    - change email pk: id -> email_id
+    - add field: Email.address
+    - add fk: Config.user
+    - drop fk: Email.user
+    - drop field: User.avatar
+    - add index: Email.email
+    - add many to many: Email.users
+    - remove unique: User.username
+    - change column: length User.password
+    - add unique_together: (name,type) of Product
+    - alter default: Config.status
+    - rename column: Product.image -> Product.pic
+    """
+    mocker.patch("click.prompt", side_effect=(False, True))
+
+    models_describe = get_models_describe("models")
+    Migrate.app = "models"
+    if isinstance(Migrate.ddl, SqliteDDL):
+        with pytest.raises(NotSupportError):
+            Migrate.diff_models(old_models_describe, models_describe)
+            Migrate.diff_models(models_describe, old_models_describe, False)
+    else:
+        Migrate.diff_models(old_models_describe, models_describe)
+        Migrate.diff_models(models_describe, old_models_describe, False)
+    Migrate._merge_operators()
+    if isinstance(Migrate.ddl, MysqlDDL):
+        assert sorted(Migrate.upgrade_operators) == sorted(
+            [
+                "ALTER TABLE `config` ADD `user_id` INT NOT NULL  COMMENT 'User'",
+                "ALTER TABLE `config` ADD CONSTRAINT `fk_config_user_17daa970` FOREIGN KEY (`user_id`) REFERENCES `user` (`id`) ON DELETE CASCADE",
+                "ALTER TABLE `config` ALTER COLUMN `status` DROP DEFAULT",
+                "ALTER TABLE `email` ADD `address` VARCHAR(200) NOT NULL",
+                "ALTER TABLE `email` DROP COLUMN `user_id`",
+                "ALTER TABLE `product` RENAME COLUMN `image` TO `pic`",
+                "ALTER TABLE `email` RENAME COLUMN `id` TO `email_id`",
+                "ALTER TABLE `email` DROP FOREIGN KEY `fk_email_user_5b58673d`",
+                "ALTER TABLE `email` ADD INDEX `idx_email_email_4a1a33` (`email`)",
+                "ALTER TABLE `product` ADD UNIQUE INDEX `uid_product_name_f14935` (`name`, `type`)",
+                "ALTER TABLE `product` ALTER COLUMN `view_num` SET DEFAULT 0",
+                "ALTER TABLE `user` DROP COLUMN `avatar`",
+                "ALTER TABLE `user` CHANGE password password VARCHAR(100)",
+                "ALTER TABLE `user` ADD UNIQUE INDEX `uid_user_usernam_9987ab` (`username`)",
+                "CREATE TABLE `email_user` (`email_id` INT NOT NULL REFERENCES `email` (`email_id`) ON DELETE CASCADE,`user_id` INT NOT NULL REFERENCES `user` (`id`) ON DELETE CASCADE) CHARACTER SET utf8mb4",
+            ]
+        )
+
+        assert sorted(Migrate.downgrade_operators) == sorted(
+            [
+                "ALTER TABLE `config` DROP COLUMN `user_id`",
+                "ALTER TABLE `config` DROP FOREIGN KEY `fk_config_user_17daa970`",
+                "ALTER TABLE `config` ALTER COLUMN `status` SET DEFAULT 1",
+                "ALTER TABLE `email` ADD `user_id` INT NOT NULL",
+                "ALTER TABLE `email` DROP COLUMN `address`",
+                "ALTER TABLE `product` RENAME COLUMN `pic` TO `image`",
+                "ALTER TABLE `email` RENAME COLUMN `email_id` TO `id`",
+                "ALTER TABLE `email` ADD CONSTRAINT `fk_email_user_5b58673d` FOREIGN KEY (`user_id`) REFERENCES `user` (`id`) ON DELETE CASCADE",
+                "ALTER TABLE `email` DROP INDEX `idx_email_email_4a1a33`",
+                "ALTER TABLE `product` DROP INDEX `uid_product_name_f14935`",
+                "ALTER TABLE `product` ALTER COLUMN `view_num` DROP DEFAULT",
+                "ALTER TABLE `user` ADD `avatar` VARCHAR(200) NOT NULL  DEFAULT ''",
+                "ALTER TABLE `user` DROP INDEX `idx_user_usernam_9987ab`",
+                "ALTER TABLE `user` CHANGE password password VARCHAR(200)",
+                "DROP TABLE IF EXISTS `email_user`",
+            ]
+        )
+
+    elif isinstance(Migrate.ddl, PostgresDDL):
+        assert sorted(Migrate.upgrade_operators) == sorted(
+            [
+                'ALTER TABLE "config" ADD "user_id" INT NOT NULL',
+                'ALTER TABLE "config" ADD CONSTRAINT "fk_config_user_17daa970" FOREIGN KEY ("user_id") REFERENCES "user" ("id") ON DELETE CASCADE',
+                'ALTER TABLE "config" ALTER COLUMN "status" DROP DEFAULT',
+                'ALTER TABLE "email" ADD "address" VARCHAR(200) NOT NULL',
+                'ALTER TABLE "email" DROP COLUMN "user_id"',
+                'ALTER TABLE "product" RENAME COLUMN "image" TO "pic"',
+                'ALTER TABLE "email" RENAME COLUMN "id" TO "email_id"',
+                'ALTER TABLE "email" DROP CONSTRAINT "fk_email_user_5b58673d"',
+                'CREATE INDEX "idx_email_email_4a1a33" ON "email" ("email")',
+                'CREATE UNIQUE INDEX "uid_product_name_f14935" ON "product" ("name", "type")',
+                'ALTER TABLE "product" ALTER COLUMN "view_num" SET DEFAULT 0',
+                'ALTER TABLE "user" DROP COLUMN "avatar"',
+                'ALTER TABLE "user" CHANGE password password VARCHAR(100)',
+                'CREATE UNIQUE INDEX "uid_user_usernam_9987ab" ON "user" ("username")',
+                'CREATE TABLE "email_user" ("email_id" INT NOT NULL REFERENCES "email" ("email_id") ON DELETE CASCADE,"user_id" INT NOT NULL REFERENCES "user" ("id") ON DELETE CASCADE)',
+            ]
+        )
+        assert sorted(Migrate.downgrade_operators) == sorted(
+            [
+                'ALTER TABLE "config" DROP COLUMN "user_id"',
+                'ALTER TABLE "config" DROP CONSTRAINT "fk_config_user_17daa970"',
+                'ALTER TABLE "config" ALTER COLUMN "status" SET DEFAULT 1',
+                'ALTER TABLE "email" ADD "user_id" INT NOT NULL',
+                'ALTER TABLE "email" DROP COLUMN "address"',
+                'ALTER TABLE "product" RENAME COLUMN "pic" TO "image"',
+                'ALTER TABLE "email" RENAME COLUMN "email_id" TO "id"',
+                'ALTER TABLE "email" ADD CONSTRAINT "fk_email_user_5b58673d" FOREIGN KEY ("user_id") REFERENCES "user" ("id") ON DELETE CASCADE',
+                'DROP INDEX "idx_email_email_4a1a33"',
+                'ALTER TABLE "product" ALTER COLUMN "view_num" DROP DEFAULT',
+                'ALTER TABLE "user" ADD "avatar" VARCHAR(200) NOT NULL  DEFAULT \'\'',
+                'DROP INDEX "idx_user_usernam_9987ab"',
+                'DROP INDEX "uid_product_name_f14935"',
+                'ALTER TABLE "user" CHANGE password password VARCHAR(200)',
+                'DROP TABLE IF EXISTS "email_user"',
+            ]
+        )
+    elif isinstance(Migrate.ddl, SqliteDDL):
+        assert Migrate.upgrade_operators == [
+            'ALTER TABLE "config" ADD "user_id" INT NOT NULL  /* User */',
+            'ALTER TABLE "config" ADD CONSTRAINT "fk_config_user_17daa970" FOREIGN KEY ("user_id") REFERENCES "user" ("id") ON DELETE CASCADE',
+        ]
+
+        assert Migrate.downgrade_operators == []
+
+
+def test_sort_all_version_files(mocker):
+    mocker.patch(
+        "os.listdir",
+        return_value=[
+            "1_datetime_update.sql",
+            "11_datetime_update.sql",
+            "10_datetime_update.sql",
+            "2_datetime_update.sql",
+        ],
+    )
+
+    Migrate.migrate_location = "."
+
+    assert Migrate.get_all_version_files() == [
+        "1_datetime_update.sql",
+        "2_datetime_update.sql",
+        "10_datetime_update.sql",
+        "11_datetime_update.sql",
+    ]
Author	SHA1	Message	Date
long2ice	be41a1332a	update tortoise-orm version	2021-02-04 20:53:04 +08:00
long2ice	09661c1d46	Fix unique_together	2021-02-04 14:39:07 +08:00
long2ice	abfa60133f	Fix drop table	2021-02-04 14:23:46 +08:00
long2ice	048e428eac	update tortoise-orm	2021-02-03 22:52:01 +08:00
long2ice	38a3df9b5a	add support m2m	2021-02-03 22:22:22 +08:00
long2ice	0d94b22b3f	Remove unused functions	2021-02-03 18:06:43 +08:00
long2ice	f1f0074255	Support rename field	2021-02-03 17:56:30 +08:00
long2ice	e3a14a2f60	Fix postgres index	2021-02-03 16:34:07 +08:00
long2ice	608ff8f071	update conftest.py	2021-02-03 15:49:40 +08:00
long2ice	d3a1342293	update README.md	2021-02-03 15:48:06 +08:00
long2ice	01e3de9522	basically completed	2021-02-03 15:43:04 +08:00
long2ice	c6c398fdf0	update	2021-02-02 22:52:50 +08:00
long2ice	c60bdd290e	add fk and drop fk	2021-02-02 20:35:05 +08:00
long2ice	f443dc68db	WIP	2021-02-01 16:54:35 +08:00
long2ice	36f84702b7	update	2021-02-01 14:00:12 +08:00
long2ice	b4cc2de0e3	v0.5 refactoring	2021-01-31 23:10:30 +08:00
long2ice	4780b90c1c	add close_connections to fix stuck	2021-01-29 22:58:12 +08:00
long2ice	cd176c1fd6	Merge pull request #111 from lqmanh/bugfixes/fix-tortoise-orm-0.16.19 Fix Aerich b/c of a new feature in Tortoise ORM v0.16.19	2021-01-04 14:59:11 +08:00
long2ice	c2819fc8dc	update CHANGELOG.md	2020-12-29 19:13:37 +08:00
long2ice	530e7cfce5	Fixed unnecessary import. (#113 )	2020-12-29 19:12:36 +08:00
Lương Quang Mạnh	47824a100b	Fix Aerich b/c of Tortoise ORM v0.16.19	2020-12-26 10:31:10 +07:00
long2ice	78a15f9f19	Merge pull request #108 from lqmanh/features/make-parent-dirs-as-needed Make parent directories as needed	2020-12-25 22:10:56 +08:00
long2ice	5ae8b9e85f	complete InspectDb	2020-12-25 21:44:26 +08:00
long2ice	55a6d4bbc7	add InspectDb and show_create_tables	2020-12-24 23:32:58 +08:00
long2ice	c5535f16e1	TODO: Add `inspectdb` command	2020-12-23 23:38:45 +08:00
long2ice	840cd71e44	Replace migrations separator to sql standard comment	2020-12-23 23:30:35 +08:00
Lương Quang Mạnh	e0d52b1210	Fix make style	2020-12-21 15:36:29 +07:00
Lương Quang Mạnh	4dc45f723a	Make parent directories as needed	2020-12-21 15:13:26 +07:00
long2ice	d2e0a68351	Fix packaging error. (#92 )	2020-12-02 23:03:15 +08:00
long2ice	ee6cc20c7d	Fix empty items	2020-11-30 11:14:09 +08:00
long2ice	4e917495a0	Fix upgrade in new db. (#96 )	2020-11-30 11:02:48 +08:00
long2ice	bfa66f6dd4	update changelog	2020-11-29 11:15:43 +08:00
long2ice	f00715d4c4	Merge pull request #97 from TrDex/pathlib-for-path-resolving Use `pathlib` for path resolving	2020-11-29 11:02:44 +08:00
Mykola Solodukha	6e3105690a	Use `pathlib` for path resolving	2020-11-28 19:23:34 +02:00
long2ice	c707f7ecb2	bug fix	2020-11-28 14:31:41 +08:00
long2ice	0bbc471e00	Fix `sqlite` stuck. (#90 )	2020-11-26 23:38:57 +08:00
long2ice	fb6cc62047	update README and CHANGELOG	2020-11-23 16:44:16 +08:00
long2ice	e9ceaf471f	Merge pull request #87 from ALexALed/remove-default-detections-for-callable Remove callable detection for defaults	2020-11-23 16:41:30 +08:00
alexaled	85fc3b2aa2	Remove callable detection for defaults	2020-11-23 10:35:40 +02:00
long2ice	a677d506a9	Fix ci error	2020-11-19 10:41:52 +08:00
long2ice	9879004fee	Add `rename` column support MySQL5	2020-11-19 10:11:52 +08:00
long2ice	5760fe2040	Merge pull request #83 from SakuraSound/fix-migrate-unlink Catch OSError (if read-only file system)	2020-11-18 15:40:29 +08:00
Joir-dan Gumbs	b229c30558	Catch OSError (if read-only file system)	2020-11-17 23:28:00 -08:00
long2ice	5d2f1604c3	update github action poetry	2020-11-17 10:57:56 +08:00
long2ice	499c4e1c02	Fix black	2020-11-17 10:50:57 +08:00
long2ice	1463ee30bc	update deps	2020-11-17 10:43:27 +08:00
long2ice	3b801932f5	Merge remote-tracking branch 'origin/dev' into dev	2020-11-17 10:36:14 +08:00
long2ice	c2eb4dc9e3	update poetry in github actions	2020-11-17 10:35:51 +08:00
long2ice	5927febd0c	Delete .DS_Store	2020-11-17 10:10:32 +08:00
long2ice	a1c10ff330	exclude .DS_store	2020-11-17 10:09:37 +08:00
long2ice	f2013c931a	Fix test error	2020-11-16 22:32:19 +08:00
long2ice	b21b954d32	Use `.sql` instead of `.json` to store version file. (#79 )	2020-11-16 22:25:01 +08:00
long2ice	f5588a35c5	update deps	2020-11-12 21:27:58 +08:00
long2ice	f5dff84476	Fix encoding error. (#75 )	2020-11-08 23:00:44 +08:00
long2ice	e399821116	update deps	2020-11-05 17:43:41 +08:00
long2ice	648f25a951	Compatible with models file in directory. (#70 )	2020-10-30 19:51:46 +08:00
long2ice	fa73e132e2	remove .vscode	2020-10-30 16:45:12 +08:00
long2ice	1bac33cd33	add confirmation_option when downgrade	2020-10-30 16:39:14 +08:00
long2ice	4e76f12ccf	update README.md	2020-10-28 17:12:23 +08:00
long2ice	724379700e	Support multiple databases. (#68 )	2020-10-28 17:02:02 +08:00
long2ice	bb929f2b55	update deps	2020-10-25 17:48:05 +08:00
long2ice	6339dc86a8	Fix migrate to new database error	2020-10-14 20:33:23 +08:00
long2ice	768747140a	update changelog	2020-10-12 21:01:53 +08:00
long2ice	1fde3cd04e	fix init KeyError (#61 )	2020-10-12 20:59:13 +08:00
long2ice	d0ce545ff5	Fix first version error	2020-10-10 15:07:09 +08:00
long2ice	09b89ed7d0	update README	2020-10-09 15:41:37 +08:00
long2ice	86c8382593	update README	2020-10-09 15:34:48 +08:00
long2ice	48e3ff48a3	update README.md	2020-10-09 12:04:36 +08:00
long2ice	1bf6d45bb0	Merge pull request #60 from tortoise/refactoring Refactoring migrate logic	2020-10-09 11:54:37 +08:00
long2ice	342f4cdd3b	complete refactoring	2020-10-09 11:53:50 +08:00
long2ice	8cace21fde	refactoring migrate logic	2020-10-09 00:05:22 +08:00
long2ice	9889d9492b	add ? when ask rename	2020-09-28 17:22:05 +08:00
long2ice	823368aea8	fix event loop error	2020-09-28 17:16:35 +08:00
long2ice	6b1ad46cf1	update README.md	2020-09-28 12:50:43 +08:00
long2ice	ce8c0b1f06	Support `db_constraint` in fk	2020-09-28 10:40:04 +08:00
long2ice	43922d3734	update CHANGELOG.md	2020-09-27 14:18:19 +08:00
long2ice	48c5318737	remove asyncclick	2020-09-25 18:27:08 +08:00
long2ice	002221e557	update README.md	2020-09-25 17:51:31 +08:00
long2ice	141d7205bf	Add `Rename` support	2020-09-25 17:48:32 +08:00
long2ice	af4d4be19a	Fix Postgres alter table	2020-09-24 15:02:28 +08:00
long2ice	3b4d9b47ce	update version	2020-09-23 18:33:31 +08:00
long2ice	4b0c4ae7d0	fix test error	2020-09-21 15:03:16 +08:00
long2ice	dc821d8a02	Merge remote-tracking branch 'origin/dev' into dev	2020-09-21 11:46:21 +08:00
long2ice	d18a6b5be0	add sqlite not support error	2020-09-21 11:44:34 +08:00
long2ice	1e56a70f21	Merge pull request #44 from saintlyzero/dev append new line in cp_models	2020-09-16 22:21:09 +08:00
saintlyzero	ab1e1aab75	append new line in cp_models	2020-09-16 19:30:03 +05:30
long2ice	00dd04f97d	update conftest.py	2020-09-10 18:42:19 +08:00
long2ice	fc914acc80	update README.md	2020-09-09 21:10:10 +08:00
long2ice	ac03ecb002	update README.md	2020-09-02 13:34:53 +08:00
long2ice	235ef3f7ea	fix datetime string format	2020-08-19 09:28:36 +08:00
long2ice	e00eb7f3d9	update README.md	2020-08-17 12:40:39 +08:00
long2ice	d6c8941676	update CHANGELOG.rst	2020-08-07 18:12:40 +08:00
long2ice	cf062c9310	update CHANGELOG.rst	2020-08-07 09:29:30 +08:00
long2ice	309adec8c9	Merge pull request #34 from moubctez/postgresql_unique PostgreSQL add/drop index/unique	2020-08-07 09:27:03 +08:00
Adam Ciarciński	8674142ba8	Fix test_migrate	2020-08-06 17:59:12 +02:00
Adam Ciarciński	cda9bd1c47	Save 1 space in tests	2020-08-06 17:50:28 +02:00
Adam Ciarciński	198e4e0032	Save 1 space	2020-08-06 17:49:26 +02:00
Adam Ciarciński	1b440477a2	PostgreSQL add/drop index/unique	2020-08-06 17:45:56 +02:00
long2ice	1263c6f735	Fix tortoise ssl config	2020-07-30 11:30:02 +08:00
long2ice	6504384879	update README.md	2020-07-29 10:30:25 +08:00
long2ice	17ab0a1421	fix version sort and add test	2020-07-29 10:21:43 +08:00
long2ice	e1ffcb609b	fix version sort	2020-07-28 18:31:45 +08:00
long2ice	18cb75f555	Merge pull request #32 from psbleep/close-tortoise-connections Close database connections	2020-07-26 16:52:08 +08:00
Patrick Schneeweis	dfe13ea250	add type hint	2020-07-25 15:22:05 -04:00
Patrick Schneeweis	b97ce0ff2f	Use close_db decorator on history command	2020-07-24 09:26:29 -04:00
Patrick Schneeweis	21001c0eda	Make history command into async function The close_db decorator requires async functions	2020-07-24 09:24:43 -04:00
Patrick Schneeweis	9bd96a9487	Use close_db decorator on command functions	2020-07-24 09:22:57 -04:00
Patrick Schneeweis	5bdaa32a9e	Decorator for closing db connection after func run	2020-07-24 09:17:19 -04:00
long2ice	d74e7b5630	Merge pull request #30 from psbleep/longer-migration-version-names Allow longer migration version names	2020-07-24 10:28:52 +08:00
Patrick Schneeweis	119b15d597	style fixes	2020-07-23 21:29:26 -04:00
Patrick Schneeweis	f93ab6bbff	Raise name length error when creating migration. Currently this error gets raised when trying to apply the migration, but it seems better to learn about it when trying to create the migration.	2020-07-23 21:22:30 -04:00
Patrick Schneeweis	bd8eb94a6e	Increase max length of version column	2020-07-23 21:21:58 -04:00
long2ice	2fcb2626fd	Fix postgres drop fk	2020-07-20 10:20:08 +08:00
long2ice	3728db4279	Merge remote-tracking branch 'origin/dev' into dev	2020-07-15 12:58:56 +08:00
long2ice	6ac1fb5332	add ads	2020-07-15 12:58:34 +08:00
long2ice	87a17d443c	update py version 3.7	2020-07-13 20:32:14 +08:00
long2ice	55f18a69ed	Merge pull request #23 from long2ice/master Master	2020-07-09 14:34:37 +08:00
long2ice	86a9c4cedd	Merge branch 'dev'	2020-07-09 14:28:09 +08:00
long2ice	86e1d3defb	fix test error	2020-07-08 21:00:30 +08:00
long2ice	01fa7fbbdb	Merge pull request #21 from moubctez/postgresql_fixes Enhance PostgreSQL support	2020-07-08 20:54:40 +08:00
Adam Ciarciński	90196eb1bf	Apply black	2020-07-08 14:38:42 +02:00
Adam Ciarciński	3c111792a9	Enhance PostgreSQL support	2020-07-07 19:54:55 +02:00
long2ice	77e9d7bc91	update deps	2020-07-06 00:10:07 +08:00
long2ice	fe2ddff88b	update version	2020-06-24 15:17:52 +08:00
long2ice	0d23297f46	Fix bug in windows.	2020-06-24 15:17:30 +08:00
long2ice	6be6d55e5b	Merge remote-tracking branch 'origin/dev' into dev	2020-06-22 12:55:46 +08:00
long2ice	25674bc73a	update Makefile	2020-06-22 12:55:26 +08:00
long2ice	1715eda1a3	Merge pull request #11 from FutureSenzhong/dev updata:File operations use utf8 encoding	2020-06-22 12:27:22 +08:00
邓森中	f5775049dd	updata:File operations use utf8 encoding	2020-06-22 11:18:52 +08:00
long2ice	6fd0f8a42f	update README.md licence	2020-06-20 12:49:43 +08:00
long2ice	f52dc009af	update README.md	2020-06-20 12:48:32 +08:00
long2ice	9248d456f9	update license	2020-06-17 11:39:15 +08:00
long2ice	c24f2f6b09	update pyproject.toml	2020-06-12 18:11:19 +08:00
long2ice	19c9c2c30f	Merge branch 'dev'	2020-06-12 17:53:30 +08:00
long2ice	73b75349ee	update version 0.2.0	2020-06-12 17:53:17 +08:00
long2ice	7bc553221a	raise NotImplementedError	2020-06-12 09:31:01 +08:00
long2ice	7413a05e19	set --safe bool	2020-06-08 18:07:41 +08:00
long2ice	bf194ca8ce	Update model file find method	2020-06-03 18:42:35 +08:00
long2ice	b06da0223a	add --build	2020-06-03 09:39:52 +08:00
long2ice	83554cdc5d	Merge remote-tracking branch 'origin/dev' into dev # Conflicts: # .github/workflows/pypi.yml # .github/workflows/test.yml # Makefile	2020-06-03 09:38:20 +08:00
long2ice	6c76bfccad	Merge remote-tracking branch 'origin/dev' into dev	2020-06-02 22:23:26 +08:00
long2ice	a1746e457c	update github actions update github actions update github actions update github actions update github actions update github actions update github actions update github actions update github actions update github actions update github actions	2020-06-02 22:23:15 +08:00
long2ice	2a0435dea9	update github actions	2020-06-02 22:14:44 +08:00
long2ice	e87f67f1e1	update github actions update github actions update github actions update github actions update github actions update github actions update github actions update github actions update github actions update github actions update github actions	2020-06-02 22:02:46 +08:00
long2ice	7b4b7ac749	update github actions	2020-06-02 18:58:59 +08:00
long2ice	5b9b51db3f	update github actions	2020-06-02 18:38:39 +08:00
long2ice	ffeee3c901	update github actions	2020-06-02 18:28:50 +08:00
long2ice	b4366d2427	update github actions	2020-06-02 18:20:55 +08:00
long2ice	ec1c80f3a9	remove requirements	2020-06-01 14:57:29 +08:00
long2ice	d2083632eb	add cli -V	2020-05-27 12:44:49 +08:00
long2ice	dc8b4c2263	Merge remote-tracking branch 'origin/master'	2020-05-27 11:22:01 +08:00
long2ice	2fc43cb0d8	Merge pull request #7 from long2ice/dev v0.1.9	2020-05-26 20:06:56 +08:00
long2ice	cb5dffeeb8	Merge branch 'dev'	2020-05-26 20:05:35 +08:00
long2ice	125389461f	check tortoise add aerich.models	2020-05-26 14:44:55 +08:00
long2ice	c09c878eaf	add support modify column diff mysql ddl	2020-05-26 10:22:02 +08:00
long2ice	ef3e0c11d5	update version	2020-05-25 23:46:35 +08:00
long2ice	881f70f748	Fix default_connection when upgrade	2020-05-25 23:44:42 +08:00
long2ice	615d9747dc	Merge pull request #5 from long2ice/dev v0.1.8	2020-05-25 22:43:36 +08:00
long2ice	6ffca1a0c7	add support modify column	2020-05-25 22:39:39 +08:00
long2ice	95e41720cb	Fix init db sql error	2020-05-25 18:53:34 +08:00
long2ice	40c0008e6e	Fix upgrade error when migrate	2020-05-25 18:02:56 +08:00
long2ice	ce75e55d60	update README.rst	2020-05-25 16:36:18 +08:00
long2ice	4d4f951e09	update README.rst	2020-05-25 16:33:56 +08:00
long2ice	354e861dad	add more test	2020-05-24 13:47:10 +08:00
long2ice	3a76486993	migrate raise error	2020-05-24 00:05:45 +08:00
long2ice	4d0a6b4de6	Fix version num str	2020-05-22 15:35:35 +08:00
long2ice	c01d2993e0	Exclude models.Aerich. Add init record when init-db.	2020-05-22 11:59:03 +08:00
long2ice	bab5ebf2f0	migrate exclude aerich.models	2020-05-22 11:14:16 +08:00
long2ice	7e5cefd7d6	write old models exclude aerich.models	2020-05-22 11:03:52 +08:00
long2ice	0cea28d521	update version	2020-05-21 23:57:13 +08:00
long2ice	b92e6551fd	update dependency_links	2020-05-21 23:33:58 +08:00
long2ice	bbabde32a1	update version	2020-05-21 21:24:21 +08:00