remove aiomysql

Fix ci
inspectdb support DATE. (#215 )
2021-12-08 14:43:33 +08:00 · 2021-12-08 14:38:16 +08:00 · 2021-12-08 14:33:27 +08:00 · 2021-10-04 23:05:20 +08:00 · 2021-09-28 15:07:10 +08:00 · 2021-09-27 19:55:38 +08:00
29 changed files with 2949 additions and 1392 deletions
--- a/.github/FUNDING.yml
+++ b/.github/FUNDING.yml
@@ -0,0 +1 @@
+custom: ["https://sponsor.long2ice.io"]
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -1,7 +1,13 @@
-name: test
-on: [push, pull_request]
+name: ci
+on:
+  push:
+    branches-ignore:
+      - master
+  pull_request:
+    branches-ignore:
+      - master
 jobs:
-  testall:
+  ci:
    runs-on: ubuntu-latest
    services:
      postgres:
@@ -19,7 +25,10 @@ jobs:
      - uses: actions/setup-python@v2
        with:
          python-version: '3.x'
-      - uses: dschep/install-poetry-action@v1.3
+      - name: Install and configure Poetry
+        run: |
+          pip install -U pip poetry
+          poetry config virtualenvs.create false
      - name: CI
        env:
          MYSQL_PASS: root
@@ -28,4 +37,4 @@ jobs:
          POSTGRES_PASS: 123456
          POSTGRES_HOST: 127.0.0.1
          POSTGRES_PORT: 5432
-        run: make ci
+        run: make ci
--- a/.github/workflows/pypi.yml
+++ b/.github/workflows/pypi.yml
@@ -11,11 +11,14 @@ jobs:
      - uses: actions/setup-python@v2
        with:
          python-version: '3.x'
-      - uses: dschep/install-poetry-action@v1.3
+      - name: Install and configure Poetry
+        run: |
+          pip install -U pip poetry
+          poetry config virtualenvs.create false
      - name: Build dists
        run: make build
      - name: Pypi Publish
        uses: pypa/gh-action-pypi-publish@master
        with:
          user: __token__
-          password: ${{ secrets.pypi_password }}
+          password: ${{ secrets.pypi_password }}
--- a/.gitignore
+++ b/.gitignore
@@ -143,4 +143,7 @@ cython_debug/
 .idea
 migrations
 aerich.ini
-src
+src
+.vscode
+.DS_Store
+.python-version
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,121 @@
 # ChangeLog

+## 0.6
+
+### 0.6.0
+
+- Change default config file from `aerich.ini` to `pyproject.toml`. (#197)
+
+  **Upgrade note:**
+    1. Run `aerich init -t config.TORTOISE_ORM`.
+    2. Remove `aerich.ini`.
+- Remove `pydantic` dependency. (#198)
+- `inspectdb` support `DATE`. (#215)
+
+## 0.5
+
+### 0.5.8
+
+- Support `indexes` change. (#193)
+
+### 0.5.7
+
+- Fix no module found error. (#188) (#189)
+
+### 0.5.6
+
+- Add `Command` class. (#148) (#141) (#123) (#106)
+- Fix: migrate doesn't use source_field in unique_together. (#181)
+
+### 0.5.5
+
+- Fix KeyError: 'src_folder' after upgrading aerich to 0.5.4. (#176)
+- Fix MySQL 5.X rename column.
+- Fix `db_constraint` when fk changed. (#179)
+
+### 0.5.4
+
+- Fix incorrect index creation order. (#151)
+- Not catch exception when import config. (#164)
+- Support `drop column` for sqlite. (#40)
+
+### 0.5.3
+
+- Fix postgre alter null. (#142)
+- Fix default function when migrate. (#147)
+
+### 0.5.2
+
+- Fix rename field on the field add. (#134)
+- Fix postgres field type change error. (#135)
+- Fix inspectdb for `FloatField`. (#138)
+- Support `rename table`. (#139)
+
+### 0.5.1
+
+- Fix tortoise connections not being closed properly. (#120)
+- Fix bug for field change. (#119)
+- Fix drop model in the downgrade. (#132)
+
+### 0.5.0
+
+- Refactor core code, now has no limitation for everything.
+
+## 0.4
+
+### 0.4.4
+
+- Fix unnecessary import. (#113)
+
+### 0.4.3
+
+- Replace migrations separator to sql standard comment.
+- Add `inspectdb` command.
+
+### 0.4.2
+
+- Use `pathlib` for path resolving. (#89)
+- Fix upgrade in new db. (#96)
+- Fix packaging error. (#92)
+
+### 0.4.1
+
+- Bug fix. (#91 #93)
+
+### 0.4.0
+
+- Use `.sql` instead of `.json` to store version file.
+- Add `rename` column support MySQL5.
+- Remove callable detection for defaults. (#87)
+- Fix `sqlite` stuck. (#90)
+
+## 0.3
+
+### 0.3.3
+
+- Fix encoding error. (#75)
+- Support multiple databases. (#68)
+- Compatible with models file in directory. (#70)
+
+### 0.3.2
+
+- Fix migrate to new database error. (#62)
+
+### 0.3.1
+
+- Fix first version error.
+- Fix init error. (#61)
+
+### 0.3.0
+
+- Refactoring migrate logic, and this version is not compatible with previous version.
+- Now there don't need `old_models.py` and it store in database.
+- Upgrade steps:
+    1. Upgrade aerich version.
+    2. Drop aerich table in database.
+    3. Delete `migrations/{app}` folder and rerun `aerich init-db`.
+    4. Update model and `aerich migrate` normally.
+
 ## 0.2

 ### 0.2.5
--- a/18
+++ b/18
@@ -3,26 +3,16 @@ black_opts = -l 100 -t py38
 py_warn = PYTHONDEVMODE=1
 MYSQL_HOST ?= "127.0.0.1"
 MYSQL_PORT ?= 3306
+MYSQL_PASS ?= "123456"
 POSTGRES_HOST ?= "127.0.0.1"
 POSTGRES_PORT ?= 5432
-
-help:
-	@echo "Aerich development makefile"
-	@echo
-	@echo  "usage: make <target>"
-	@echo  "Targets:"
-	@echo  "    up			Updates dev/test dependencies"
-	@echo  "    deps		Ensure dev/test dependencies are installed"
-	@echo  "    check		Checks that build is sane"
-	@echo  "    lint		Reports all linter violations"
-	@echo  "    test		Runs all tests"
-	@echo  "    style		Auto-formats the code"
+POSTGRES_PASS ?= "123456"

 up:
 	@poetry update

 deps:
-	@poetry install -E dbdrivers --no-root
+	@poetry install -E asyncpg -E asyncmy

 style: deps
 	isort -src $(checkfiles)
@@ -43,7 +33,7 @@ test_mysql:
 	$(py_warn) TEST_DB="mysql://root:$(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_\{\}" pytest
+	$(py_warn) TEST_DB="postgres://postgres:$(POSTGRES_PASS)@$(POSTGRES_HOST):$(POSTGRES_PORT)/test_\{\}" pytest -vv -s

 testall: deps test_sqlite test_postgres test_mysql

--- a/README.md
+++ b/README.md
@@ -1,55 +1,50 @@
 # Aerich

 [![image](https://img.shields.io/pypi/v/aerich.svg?style=flat)](https://pypi.python.org/pypi/aerich)
-[![image](https://img.shields.io/github/license/long2ice/aerich)](https://github.com/long2ice/aerich)
-[![image](https://github.com/long2ice/aerich/workflows/pypi/badge.svg)](https://github.com/long2ice/aerich/actions?query=workflow:pypi)
-[![image](https://github.com/long2ice/aerich/workflows/test/badge.svg)](https://github.com/long2ice/aerich/actions?query=workflow:test)
+[![image](https://img.shields.io/github/license/tortoise/aerich)](https://github.com/tortoise/aerich)
+[![image](https://github.com/tortoise/aerich/workflows/pypi/badge.svg)](https://github.com/tortoise/aerich/actions?query=workflow:pypi)
+[![image](https://github.com/tortoise/aerich/workflows/ci/badge.svg)](https://github.com/tortoise/aerich/actions?query=workflow:ci)

 ## Introduction

-Tortoise-ORM is the best asyncio ORM now, but it lacks a database
-migrations tool like alembic for SQLAlchemy, or Django ORM with it\'s
-own migrations tool.
-
-This project aim to be a best migrations tool for Tortoise-ORM and which
-written by one of contributors of Tortoise-ORM.
+Aerich is a database migrations tool for Tortoise-ORM, which is like alembic for SQLAlchemy, or like Django ORM with
+it\'s own migration solution.

 ## Install

 Just install from pypi:

 ```shell
-> pip install aerich
+pip install aerich
 ```

 ## Quick Start

 ```shell
-$ aerich -h
+> aerich -h

 Usage: aerich [OPTIONS] COMMAND [ARGS]...

 Options:
-  -c, --config TEXT  Config file.  [default: aerich.ini]
-  --app TEXT         Tortoise-ORM app name.  [default: models]
-  -n, --name TEXT    Name of section in .ini file to use for aerich config.
-                     [default: aerich]
+  -V, --version      Show the version and exit.
+  -c, --config TEXT  Config file.  [default: pyproject.toml]
+  --app TEXT         Tortoise-ORM app name.
  -h, --help         Show this message and exit.

 Commands:
-  downgrade  Downgrade to previous version.
+  downgrade  Downgrade to specified version.
  heads      Show current available heads in migrate location.
  history    List all migrate items.
  init       Init config file and generate root migrate location.
  init-db    Generate schema and generate app migrate location.
+  inspectdb  Introspects the database tables to standard output as...
  migrate    Generate migrate changes file.
-  upgrade    Upgrade to latest version.
+  upgrade    Upgrade to specified version.
 ```

 ## Usage

-You need add `aerich.models` to your `Tortoise-ORM` config first,
-example:
+You need add `aerich.models` to your `Tortoise-ORM` config first. Example:

 ```python
 TORTOISE_ORM = {
@@ -66,99 +61,175 @@ TORTOISE_ORM = {
 ### Initialization

 ```shell
-$ aerich init -h
+> aerich init -h

 Usage: aerich init [OPTIONS]

  Init config file and generate root migrate location.

 Options:
-  -t, --tortoise-orm TEXT  Tortoise-ORM config module dict variable, like settings.TORTOISE_ORM.
-                           [required]
+  -t, --tortoise-orm TEXT  Tortoise-ORM config module dict variable, like
+                           settings.TORTOISE_ORM.  [required]
  --location TEXT          Migrate store location.  [default: ./migrations]
+  -s, --src_folder TEXT    Folder of the source, relative to the project root.
  -h, --help               Show this message and exit.
 ```

-Init config file and location:
+Initialize the config file and migrations location:

 ```shell
-$ aerich init -t tests.backends.mysql.TORTOISE_ORM
+> aerich init -t tests.backends.mysql.TORTOISE_ORM

 Success create migrate location ./migrations
-Success generate config file aerich.ini
+Success write config to pyproject.toml
 ```

 ### Init db

 ```shell
-$ aerich init-db
+> aerich init-db

 Success create app migrate location ./migrations/models
 Success generate schema for app "models"
 ```

-If your Tortoise-ORM app is not default `models`, you must specify
-`--app` like `aerich --app other_models init-db`.
+If your Tortoise-ORM app is not the default `models`, you must specify the correct app via `--app`,
+e.g. `aerich --app other_models init-db`.

 ### Update models and make migrate

 ```shell
-$ aerich migrate --name drop_column
+> aerich migrate --name drop_column

-Success migrate 1_202029051520102929_drop_column.json
+Success migrate 1_202029051520102929_drop_column.sql
 ```

 Format of migrate filename is
-`{version_num}_{datetime}_{name|update}.json`.
+`{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.
-
-If you use `MySQL`, only MySQL8.0+ support `rename..to` syntax.
+If `aerich` guesses you are renaming a column, it will ask `Rename {old_column} to {new_column} [True]`. You can choose
+`True` to rename column without column drop, or choose `False` to drop the column then create. Note that the latter may
+lose data.

 ### Upgrade to latest version

 ```shell
-$ aerich upgrade
+> aerich upgrade

-Success upgrade 1_202029051520102929_drop_column.json
+Success upgrade 1_202029051520102929_drop_column.sql
 ```

 Now your db is migrated to latest.

-### Downgrade to previous version
+### Downgrade to specified version

 ```shell
-$ aerich downgrade
+> aerich downgrade -h

-Success downgrade 1_202029051520102929_drop_column.json
+Usage: aerich downgrade [OPTIONS]
+
+  Downgrade to specified version.
+
+Options:
+  -v, --version INTEGER  Specified version, default to last.  [default: -1]
+  -d, --delete           Delete version files at the same time.  [default:
+                         False]
+
+  --yes                  Confirm the action without prompting.
+  -h, --help             Show this message and exit.
 ```

-Now your db rollback to previous version.
+```shell
+> aerich downgrade
+
+Success downgrade 1_202029051520102929_drop_column.sql
+```
+
+Now your db is rolled back to the specified version.

 ### Show history

 ```shell
-$ aerich history
+> aerich history

-1_202029051520102929_drop_column.json
+1_202029051520102929_drop_column.sql
 ```

 ### Show heads to be migrated

 ```shell
-$ aerich heads
+> aerich heads

-1_202029051520102929_drop_column.json
+1_202029051520102929_drop_column.sql
 ```

-## Support this project
+### Inspect db tables to TortoiseORM model

- Just give a star!
- Donation.
+Currently `inspectdb` only supports MySQL.

-| 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. |
+```shell
+Usage: aerich inspectdb [OPTIONS]
+
+  Introspects the database tables to standard output as TortoiseORM model.
+
+Options:
+  -t, --table TEXT  Which tables to inspect.
+  -h, --help        Show this message and exit.
+```
+
+Inspect all tables and print to console:
+
+```shell
+aerich --app models inspectdb
+```
+
+Inspect a specified table in the default app and redirect to `models.py`:
+
+```shell
+aerich inspectdb -t user > models.py
+```
+
+Note that this command is limited and cannot infer some fields, such as `IntEnumField`, `ForeignKeyField`, and others.
+
+### Multiple databases
+
+```python
+tortoise_orm = {
+    "connections": {
+        "default": expand_db_url(db_url, True),
+        "second": expand_db_url(db_url_second, True),
+    },
+    "apps": {
+        "models": {"models": ["tests.models", "aerich.models"], "default_connection": "default"},
+        "models_second": {"models": ["tests.models_second"], "default_connection": "second", },
+    },
+}
+```
+
+You only need to specify `aerich.models` in one app, and must specify `--app` when running `aerich migrate` and so on.
+
+## Restore `aerich` workflow
+
+In some cases, such as broken changes from upgrade of `aerich`, you can't run `aerich migrate` or `aerich upgrade`, you
+can make the following steps:
+
+1. drop `aerich` table.
+2. delete `migrations/{app}` directory.
+3. rerun `aerich init-db`.
+
+Note that these actions is safe, also you can do that to reset your migrations if your migration files is too many.
+
+## Use `aerich` in application
+
+You can use `aerich` out of cli by use `Command` class.
+
+```python
+from aerich import Command
+
+command = Command(tortoise_config=config, app='models')
+await command.init()
+await command.migrate('test')
+```

 ## License

--- a/aerich/init.py
+++ b/aerich/init.py
@@ -1 +1,138 @@
-__version__ = "0.2.5"
+import os
+from pathlib import Path
+from typing import List
+
+from tortoise import Tortoise, generate_schema_for_client
+from tortoise.exceptions import OperationalError
+from tortoise.transactions import in_transaction
+from tortoise.utils import get_schema_sql
+
+from aerich.exceptions import DowngradeError
+from aerich.inspectdb import InspectDb
+from aerich.migrate import Migrate
+from aerich.models import Aerich
+from aerich.utils import (
+    get_app_connection,
+    get_app_connection_name,
+    get_models_describe,
+    get_version_content_from_file,
+    write_version_file,
+)
+
+
+class Command:
+    def __init__(
+        self,
+        tortoise_config: dict,
+        app: str = "models",
+        location: str = "./migrations",
+    ):
+        self.tortoise_config = tortoise_config
+        self.app = app
+        self.location = location
+        Migrate.app = app
+
+    async def init(self):
+        await Migrate.init(self.tortoise_config, self.app, self.location)
+
+    async def upgrade(self):
+        migrated = []
+        for version_file in Migrate.get_all_version_files():
+            try:
+                exists = await Aerich.exists(version=version_file, app=self.app)
+            except OperationalError:
+                exists = False
+            if not exists:
+                async with in_transaction(
+                    get_app_connection_name(self.tortoise_config, self.app)
+                ) as conn:
+                    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=self.app,
+                        content=get_models_describe(self.app),
+                    )
+                migrated.append(version_file)
+        return migrated
+
+    async def downgrade(self, version: int, delete: bool):
+        ret = []
+        if version == -1:
+            specified_version = await Migrate.get_last_version()
+        else:
+            specified_version = await Aerich.filter(
+                app=self.app, version__startswith=f"{version}_"
+            ).first()
+        if not specified_version:
+            raise DowngradeError("No specified version found")
+        if version == -1:
+            versions = [specified_version]
+        else:
+            versions = await Aerich.filter(app=self.app, pk__gte=specified_version.pk)
+        for version in versions:
+            file = version.version
+            async with in_transaction(
+                get_app_connection_name(self.tortoise_config, self.app)
+            ) as conn:
+                file_path = Path(Migrate.migrate_location, file)
+                content = get_version_content_from_file(file_path)
+                downgrade_query_list = content.get("downgrade")
+                if not downgrade_query_list:
+                    raise DowngradeError("No downgrade items found")
+                for downgrade_query in downgrade_query_list:
+                    await conn.execute_query(downgrade_query)
+                await version.delete()
+                if delete:
+                    os.unlink(file_path)
+                ret.append(file)
+        return ret
+
+    async def heads(self):
+        ret = []
+        versions = Migrate.get_all_version_files()
+        for version in versions:
+            if not await Aerich.exists(version=version, app=self.app):
+                ret.append(version)
+        return ret
+
+    async def history(self):
+        ret = []
+        versions = Migrate.get_all_version_files()
+        for version in versions:
+            ret.append(version)
+        return ret
+
+    async def inspectdb(self, tables: List[str]):
+        connection = get_app_connection(self.tortoise_config, self.app)
+        inspect = InspectDb(connection, tables)
+        await inspect.inspect()
+
+    async def migrate(self, name: str = "update"):
+        return await Migrate.migrate(name)
+
+    async def init_db(self, safe: bool):
+        location = self.location
+        app = self.app
+        dirname = Path(location, app)
+        dirname.mkdir(parents=True)
+
+        await Tortoise.init(config=self.tortoise_config)
+        connection = get_app_connection(self.tortoise_config, app)
+        await generate_schema_for_client(connection, safe)
+
+        schema = get_schema_sql(connection, safe)
+
+        version = await Migrate.generate_version()
+        await Aerich.create(
+            version=version,
+            app=app,
+            content=get_models_describe(app),
+        )
+        content = {
+            "upgrade": [schema],
+        }
+        write_version_file(Path(dirname, version), content)
--- a/aerich/cli.py
+++ b/aerich/cli.py
@@ -1,32 +1,38 @@
 import asyncio
-import json
 import os
-import sys
-from configparser import ConfigParser
 from functools import wraps
+from pathlib import Path
+from typing import List

 import click
+import tomlkit
 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 tomlkit.exceptions import NonExistentKey
+from tortoise import Tortoise

-from aerich.migrate import Migrate
-from aerich.utils import get_app_connection, get_app_connection_name, get_tortoise_config
+from aerich.exceptions import DowngradeError
+from aerich.utils import add_src_path, get_tortoise_config

-from . import __version__
+from . import Command
 from .enums import Color
-from .models import Aerich
+from .version import __version__

-parser = ConfigParser()
+CONFIG_DEFAULT_VALUES = {
+    "src_folder": ".",
+}


 def coro(f):
    @wraps(f)
    def wrapper(*args, **kwargs):
        loop = asyncio.get_event_loop()
-        return loop.run_until_complete(f(*args, **kwargs))
+
+        # Close db connections at the end of all all but the cli group function
+        try:
+            loop.run_until_complete(f(*args, **kwargs))
+        finally:
+            if f.__name__ != "cli":
+                loop.run_until_complete(Tortoise.close_connections())

    return wrapper

@@ -34,42 +40,42 @@ def coro(f):
@click.group(context_settings={"help_option_names": ["-h", "--help"]})
@click.version_option(__version__, "-V", "--version")
@click.option(
-    "-c", "--config", default="aerich.ini", show_default=True, help="Config file.",
+    "-c",
+    "--config",
+    default="pyproject.toml",
+    show_default=True,
+    help="Config file.",
 )
@click.option("--app", required=False, help="Tortoise-ORM app name.")
-@click.option(
-    "-n",
-    "--name",
-    default="aerich",
-    show_default=True,
-    help="Name of section in .ini file to use for aerich config.",
-)
@click.pass_context
@coro
-async def cli(ctx: Context, config, app, name):
+async def cli(ctx: Context, config, app):
    ctx.ensure_object(dict)
    ctx.obj["config_file"] = config
-    ctx.obj["name"] = name

    invoked_subcommand = ctx.invoked_subcommand
    if invoked_subcommand != "init":
-        if not os.path.exists(config):
+        if not Path(config).exists():
            raise UsageError("You must exec init first", ctx=ctx)
-        parser.read(config)
-
-        location = parser[name]["location"]
-        tortoise_orm = parser[name]["tortoise_orm"]
-
+        with open(config, "r") as f:
+            content = f.read()
+        doc = tomlkit.parse(content)
+        try:
+            tool = doc["tool"]["aerich"]
+            location = tool["location"]
+            tortoise_orm = tool["tortoise_orm"]
+            src_folder = tool.get("src_folder", CONFIG_DEFAULT_VALUES["src_folder"])
+        except NonExistentKey:
+            raise UsageError("You need run aerich init again when upgrade to 0.6.0+")
+        add_src_path(src_folder)
        tortoise_config = get_tortoise_config(ctx, tortoise_orm)
        app = app or list(tortoise_config.get("apps").keys())[0]
-        if "aerich.models" not in tortoise_config.get("apps").get(app).get("models"):
-            raise UsageError("Check your tortoise config and add aerich.models to it.", ctx=ctx)
-        ctx.obj["config"] = tortoise_config
-        ctx.obj["location"] = location
-        ctx.obj["app"] = app
-
+        command = Command(tortoise_config=tortoise_config, app=app, location=location)
+        ctx.obj["command"] = command
        if invoked_subcommand != "init-db":
-            await Migrate.init_with_old_models(tortoise_config, app, location)
+            if not Path(location, app).exists():
+                raise UsageError("You must exec init-db first", ctx=ctx)
+            await command.init()


@cli.command(help="Generate migrate changes file.")
@@ -77,90 +83,80 @@ async def cli(ctx: Context, config, app, name):
@click.pass_context
@coro
 async def migrate(ctx: Context, name):
-    config = ctx.obj["config"]
-    location = ctx.obj["location"]
-    app = ctx.obj["app"]
-    ret = await Migrate.migrate(name)
+    command = ctx.obj["command"]
+    ret = await command.migrate(name)
    if not ret:
        return click.secho("No changes detected", fg=Color.yellow)
-    Migrate.write_old_models(config, app, location)
    click.secho(f"Success migrate {ret}", fg=Color.green)


-@cli.command(help="Upgrade to latest version.")
+@cli.command(help="Upgrade to specified version.")
@click.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():
-        try:
-            exists = await Aerich.exists(version=version, app=app)
-        except OperationalError:
-            exists = False
-        if not exists:
-            async with in_transaction(get_app_connection_name(config, app)) as conn:
-                file_path = os.path.join(Migrate.migrate_location, version)
-                with open(file_path, "r", encoding="utf-8") as f:
-                    content = json.load(f)
-                    upgrade_query_list = content.get("upgrade")
-                    for upgrade_query in upgrade_query_list:
-                        await conn.execute_script(upgrade_query)
-                await Aerich.create(version=version, app=app)
-            click.secho(f"Success upgrade {version}", fg=Color.green)
-            migrated = True
+    command = ctx.obj["command"]
+    migrated = await command.upgrade()
    if not migrated:
-        click.secho("No migrate items", fg=Color.yellow)
+        click.secho("No upgrade items found", fg=Color.yellow)
+    else:
+        for version_file in migrated:
+            click.secho(f"Success upgrade {version_file}", fg=Color.green)


-@cli.command(help="Downgrade to previous version.")
+@cli.command(help="Downgrade to specified version.")
+@click.option(
+    "-v",
+    "--version",
+    default=-1,
+    type=int,
+    show_default=True,
+    help="Specified version, default to last.",
+)
+@click.option(
+    "-d",
+    "--delete",
+    is_flag=True,
+    default=False,
+    show_default=True,
+    help="Delete version files at the same time.",
+)
@click.pass_context
+@click.confirmation_option(
+    prompt="Downgrade is dangerous, which maybe lose your data, are you sure?",
+)
@coro
-async def downgrade(ctx: Context):
-    app = ctx.obj["app"]
-    config = ctx.obj["config"]
-    last_version = await Migrate.get_last_version()
-    if not last_version:
-        return click.secho("No last version found", fg=Color.yellow)
-    file = last_version.version
-    async with in_transaction(get_app_connection_name(config, app)) as conn:
-        file_path = os.path.join(Migrate.migrate_location, file)
-        with open(file_path, "r", encoding="utf-8") as f:
-            content = json.load(f)
-            downgrade_query_list = content.get("downgrade")
-            if not downgrade_query_list:
-                return click.secho("No downgrade item found", fg=Color.yellow)
-            for downgrade_query in downgrade_query_list:
-                await conn.execute_query(downgrade_query)
-            await last_version.delete()
-        return click.secho(f"Success downgrade {file}", fg=Color.green)
+async def downgrade(ctx: Context, version: int, delete: bool):
+    command = ctx.obj["command"]
+    try:
+        files = await command.downgrade(version, delete)
+    except DowngradeError as e:
+        return click.secho(str(e), fg=Color.yellow)
+    for file in files:
+        click.secho(f"Success downgrade {file}", fg=Color.green)


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


@cli.command(help="List all migrate items.")
@click.pass_context
@coro
 async def history(ctx: Context):
-    versions = Migrate.get_all_version_files()
+    command = ctx.obj["command"]
+    versions = await command.history()
+    if not versions:
+        return click.secho("No history, try migrate", fg=Color.green)
    for version in versions:
        click.secho(version, fg=Color.green)
-    if not versions:
-        click.secho("No history,try migrate", fg=Color.green)


@cli.command(help="Init config file and generate root migrate location.")
@@ -171,30 +167,49 @@ async def history(ctx: Context):
    help="Tortoise-ORM config module dict variable, like settings.TORTOISE_ORM.",
 )
@click.option(
-    "--location", default="./migrations", show_default=True, help="Migrate store location."
+    "--location",
+    default="./migrations",
+    show_default=True,
+    help="Migrate store location.",
+)
+@click.option(
+    "-s",
+    "--src_folder",
+    default=CONFIG_DEFAULT_VALUES["src_folder"],
+    show_default=False,
+    help="Folder of the source, relative to the project root.",
 )
@click.pass_context
@coro
-async def init(
-    ctx: Context, tortoise_orm, location,
-):
+async def init(ctx: Context, tortoise_orm, location, src_folder):
    config_file = ctx.obj["config_file"]
-    name = ctx.obj["name"]
-    if os.path.exists(config_file):
-        return click.secho("You have inited", fg=Color.yellow)

-    parser.add_section(name)
-    parser.set(name, "tortoise_orm", tortoise_orm)
-    parser.set(name, "location", location)
+    if os.path.isabs(src_folder):
+        src_folder = os.path.relpath(os.getcwd(), src_folder)
+    # Add ./ so it's clear that this is relative path
+    if not src_folder.startswith("./"):
+        src_folder = "./" + src_folder

-    with open(config_file, "w", encoding="utf-8") as f:
-        parser.write(f)
+    # check that we can find the configuration, if not we can fail before the config file gets created
+    add_src_path(src_folder)
+    get_tortoise_config(ctx, tortoise_orm)

-    if not os.path.isdir(location):
-        os.mkdir(location)
+    with open(config_file, "r") as f:
+        content = f.read()
+    doc = tomlkit.parse(content)
+    table = tomlkit.table()
+    table["tortoise_orm"] = tortoise_orm
+    table["location"] = location
+    table["src_folder"] = src_folder
+    doc["tool"]["aerich"] = table
+
+    with open(config_file, "w") as f:
+        f.write(tomlkit.dumps(doc))
+
+    Path(location).mkdir(parents=True, exist_ok=True)

    click.secho(f"Success create migrate location {location}", fg=Color.green)
-    click.secho(f"Success generate config file {config_file}", fg=Color.green)
+    click.secho(f"Success write config to {config_file}", fg=Color.green)


@cli.command(help="Generate schema and generate app migrate location.")
@@ -208,35 +223,37 @@ async def init(
@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)
+    command = ctx.obj["command"]
+    app = command.app
+    dirname = Path(command.location, app)
+    try:
+        await command.init_db(safe)
        click.secho(f"Success create app migrate location {dirname}", fg=Color.green)
-    else:
-        return click.secho(f"Inited {app} already", fg=Color.yellow)
+        click.secho(f'Success generate schema for app "{app}"', fg=Color.green)
+    except FileExistsError:
+        return click.secho(
+            f"Inited {app} already, or delete {dirname} and try again.", fg=Color.yellow
+        )

-    Migrate.write_old_models(config, app, location)

-    await Tortoise.init(config=config)
-    connection = get_app_connection(config, app)
-    await generate_schema_for_client(connection, safe)
-
-    schema = get_schema_sql(connection, safe)
-
-    version = await Migrate.generate_version()
-    await Aerich.create(version=version, app=app)
-    with open(os.path.join(dirname, version), "w", encoding="utf-8") as f:
-        content = {
-            "upgrade": [schema],
-        }
-        json.dump(content, f, ensure_ascii=False, indent=2)
-    return click.secho(f'Success generate schema for app "{app}"', fg=Color.green)
+@cli.command(help="Introspects the database tables to standard output as TortoiseORM model.")
+@click.option(
+    "-t",
+    "--table",
+    help="Which tables to inspect.",
+    multiple=True,
+    required=False,
+)
+@click.pass_context
+@coro
+async def inspectdb(ctx: Context, table: List[str]):
+    command = ctx.obj["command"]
+    await command.inspectdb(table)


 def main():
-    sys.path.insert(0, ".")
    cli()
+
+
+if __name__ == "__main__":
+    main()
--- a/aerich/ddl/init.py
+++ b/aerich/ddl/init.py
@@ -1,8 +1,10 @@
+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 CASCADE, Field, JSONField, TextField, UUIDField
+
+from aerich.utils import is_default_function


 class BaseDDL:
@@ -11,17 +13,22 @@ class BaseDDL:
    _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})'
+        '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};'
+    _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}'
+    )
+    _RENAME_TABLE_TEMPLATE = 'ALTER TABLE "{old_table_name}" RENAME TO "{new_table_name}"'

    def __init__(self, client: "BaseDBAsyncClient"):
        self.client = client
@@ -30,43 +37,58 @@ 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"),
-            on_delete=CASCADE,
-            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 _get_default(self, model: "Type[Model]", field_object: Field):
+    def _get_default(self, model: "Type[Model]", field_describe: dict):
        db_table = model._meta.db_table
-        default = field_object.default
-        db_column = field_object.model_field_name
-        auto_now_add = getattr(field_object, "auto_now_add", False)
-        auto_now = getattr(field_object, "auto_now", False)
+        default = field_describe.get("default")
+        if isinstance(default, Enum):
+            default = default.value
+        db_column = field_describe.get("db_column")
+        auto_now_add = field_describe.get("auto_now_add", False)
+        auto_now = field_describe.get("auto_now", False)
        if default is not None or auto_now_add:
-            if callable(default) or isinstance(field_object, (UUIDField, TextField, JSONField)):
+            if (
+                field_describe.get("field_type")
+                in [
+                    "UUIDField",
+                    "TextField",
+                    "JSONField",
+                ]
+                or is_default_function(default)
+            ):
                default = ""
            else:
-                default = field_object.to_db_value(default, model)
                try:
                    default = self.schema_generator._column_default_generator(
                        db_table,
@@ -78,28 +100,33 @@ class BaseDDL:
                except NotImplementedError:
                    default = ""
        else:
-            default = ""
+            default = None
        return default

-    def add_column(self, model: "Type[Model]", field_object: Field):
+    def add_column(self, model: "Type[Model]", field_describe: dict, is_pk: bool = False):
        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,
-                default=self._get_default(model, field_object),
+                is_primary_key=is_pk,
+                default=default,
            ),
        )

@@ -108,24 +135,28 @@ class BaseDDL:
            table_name=model._meta.db_table, column_name=column_name
        )

-    def modify_column(self, model: "Type[Model]", field_object: Field):
+    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_object.model_field_name,
-                field_type=field_object.get_for_dialect(self.DIALECT, "SQL_TYPE"),
-                nullable="NOT NULL" if not field_object.null else "",
+                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_object.model_field_name,
-                    comment=field_object.description,
+                    column=field_describe.get("db_column"),
+                    comment=field_describe.get("description"),
                )
-                if field_object.description
+                if field_describe.get("description")
                else "",
-                is_primary_key=field_object.pk,
-                default=self._get_default(model, field_object),
+                is_primary_key=is_pk,
+                default=default,
            ),
        )

@@ -136,9 +167,19 @@ class BaseDDL:
            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
            ),
@@ -154,48 +195,55 @@ 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_object: Field):
-        pass
+    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_object: Field):
-        pass
+    def alter_column_null(self, model: "Type[Model]", field_describe: dict):
+        return self.modify_column(model, field_describe)

-    def set_comment(self, model: "Type[Model]", field_object: Field):
-        pass
+    def set_comment(self, model: "Type[Model]", field_describe: dict):
+        return self.modify_column(model, field_describe)
+
+    def rename_table(self, model: "Type[Model]", old_table_name: str, new_table_name: str):
+        db_table = model._meta.db_table
+        return self._RENAME_TABLE_TEMPLATE.format(
+            table_name=db_table, old_table_name=old_table_name, new_table_name=new_table_name
+        )
--- a/aerich/ddl/mysql/init.py
+++ b/aerich/ddl/mysql/init.py
@@ -8,15 +8,20 @@ class MysqlDDL(BaseDDL):
    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})"
+        "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};"
+    _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}"
+    _RENAME_TABLE_TEMPLATE = "ALTER TABLE `{old_table_name}` RENAME TO `{new_table_name}`"
--- a/aerich/ddl/postgres/init.py
+++ b/aerich/ddl/postgres/init.py
@@ -1,8 +1,7 @@
-from typing import List, Type
+from typing import Type

 from tortoise import Model
 from tortoise.backends.asyncpg.schema_generator import AsyncpgSchemaGenerator
-from tortoise.fields import Field

 from aerich.ddl import BaseDDL

@@ -10,66 +9,41 @@ from aerich.ddl import BaseDDL
 class PostgresDDL(BaseDDL):
    schema_generator_cls = AsyncpgSchemaGenerator
    DIALECT = AsyncpgSchemaGenerator.DIALECT
-    _ADD_INDEX_TEMPLATE = 'CREATE INDEX "{index_name}" ON "{table_name}" ({column_names})'
-    _ADD_UNIQUE_TEMPLATE = (
-        'ALTER TABLE "{table_name}" ADD CONSTRAINT "{index_name}" UNIQUE ({column_names})'
-    )
+    _ADD_INDEX_TEMPLATE = 'CREATE {unique}INDEX "{index_name}" ON "{table_name}" ({column_names})'
    _DROP_INDEX_TEMPLATE = 'DROP INDEX "{index_name}"'
-    _DROP_UNIQUE_TEMPLATE = 'ALTER TABLE "{table_name}" DROP CONSTRAINT "{index_name}"'
-    _ALTER_DEFAULT_TEMPLATE = 'ALTER TABLE "{table_name}" ALTER COLUMN "{column}" {default}'
    _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}'
+    _MODIFY_COLUMN_TEMPLATE = (
+        'ALTER TABLE "{table_name}" ALTER COLUMN "{column}" TYPE {datatype}{using}'
+    )
    _SET_COMMENT_TEMPLATE = 'COMMENT ON COLUMN "{table_name}"."{column}" IS {comment}'
    _DROP_FK_TEMPLATE = 'ALTER TABLE "{table_name}" DROP CONSTRAINT "{fk_name}"'

-    def alter_column_default(self, model: "Type[Model]", field_object: Field):
-        db_table = model._meta.db_table
-        default = self._get_default(model, field_object)
-        return self._ALTER_DEFAULT_TEMPLATE.format(
-            table_name=db_table,
-            column=field_object.model_field_name,
-            default="SET" + default if default else "DROP DEFAULT",
-        )
-
-    def alter_column_null(self, model: "Type[Model]", field_object: Field):
+    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_object.model_field_name,
-            set_drop="DROP" if field_object.null else "SET",
+            column=field_describe.get("db_column"),
+            set_drop="DROP" if field_describe.get("nullable") else "SET",
        )

-    def modify_column(self, model: "Type[Model]", field_object: Field):
+    def modify_column(self, model: "Type[Model]", field_describe: dict, is_pk: bool = False):
        db_table = model._meta.db_table
+        db_field_types = field_describe.get("db_field_types")
+        db_column = field_describe.get("db_column")
+        datatype = db_field_types.get(self.DIALECT) or db_field_types.get("")
        return self._MODIFY_COLUMN_TEMPLATE.format(
            table_name=db_table,
-            column=field_object.model_field_name,
-            datatype=field_object.get_for_dialect(self.DIALECT, "SQL_TYPE"),
+            column=db_column,
+            datatype=datatype,
+            using=f' USING "{db_column}"::{datatype}',
        )

-    def add_index(self, model: "Type[Model]", field_names: List[str], unique=False):
-        template = self._ADD_UNIQUE_TEMPLATE if unique else self._ADD_INDEX_TEMPLATE
-        return template.format(
-            index_name=self.schema_generator._generate_index_name(
-                "uid" if unique else "idx", model, field_names
-            ),
-            table_name=model._meta.db_table,
-            column_names=", ".join([self.schema_generator.quote(f) for f in field_names]),
-        )
-
-    def drop_index(self, model: "Type[Model]", field_names: List[str], unique=False):
-        template = self._DROP_UNIQUE_TEMPLATE if unique else self._DROP_INDEX_TEMPLATE
-        return template.format(
-            index_name=self.schema_generator._generate_index_name(
-                "uid" if unique else "idx", model, field_names
-            ),
-            table_name=model._meta.db_table,
-        )
-
-    def set_comment(self, model: "Type[Model]", field_object: Field):
+    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_object.model_field_name,
-            comment="'{}'".format(field_object.description) if field_object.description else "NULL",
+            column=field_describe.get("db_column") or field_describe.get("raw_field"),
+            comment="'{}'".format(field_describe.get("description"))
+            if field_describe.get("description")
+            else "NULL",
        )
--- a/aerich/ddl/sqlite/init.py
+++ b/aerich/ddl/sqlite/init.py
@@ -2,7 +2,6 @@ from typing import Type

 from tortoise import Model
 from tortoise.backends.sqlite.schema_generator import SqliteSchemaGenerator
-from tortoise.fields import Field

 from aerich.ddl import BaseDDL
 from aerich.exceptions import NotSupportError
@@ -12,8 +11,14 @@ 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 not support 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 modify_column(self, model: "Type[Model]", field_object: Field):
-        raise NotSupportError("Modify column is not support 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/exceptions.py
+++ b/aerich/exceptions.py
@@ -2,3 +2,9 @@ class NotSupportError(Exception):
    """
    raise when features not support
    """
+
+
+class DowngradeError(Exception):
+    """
+    raise when downgrade error
+    """
--- a/aerich/inspectdb.py
+++ b/aerich/inspectdb.py
@@ -0,0 +1,87 @@
+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})",
+        "FLOAT": "    {field} = fields.FloatField({null}{default}{comment})",
+        "DATE": "    {field} = fields.DateField({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
@@ -1,24 +1,21 @@
-import json
 import os
-import re
 from datetime import datetime
-from importlib import import_module
-from typing import Dict, List, Tuple, Type
+from pathlib import Path
+from typing import Dict, List, Optional, Tuple, Type

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

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


 class Migrate:
@@ -33,37 +30,45 @@ class Migrate:
    _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
    dialect: str
-
-    @classmethod
-    def get_old_model_file(cls):
-        return cls.old_models + ".py"
+    _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)),
+            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)
        cls.dialect = connection.schema_generator.DIALECT
@@ -79,6 +84,7 @@ class Migrate:
            from aerich.ddl.postgres import PostgresDDL

            cls.ddl = PostgresDDL(connection)
+        await cls._get_db_version(connection)

    @classmethod
    async def _get_last_version_num(cls):
@@ -93,8 +99,8 @@ class Migrate:
        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.json"
-        version = f"{last_version_num + 1}_{now}_{name}.json"
+            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
@@ -102,12 +108,15 @@ class Migrate:
    @classmethod
    async def _generate_diff_sql(cls, name):
        version = await cls.generate_version(name)
+        # delete if same version exists
+        for version_file in cls.get_all_version_files():
+            if version_file.startswith(version.split("_")[0]):
+                os.unlink(Path(cls.migrate_location, version_file))
        content = {
-            "upgrade": cls.upgrade_operators,
-            "downgrade": cls.downgrade_operators,
+            "upgrade": list(dict.fromkeys(cls.upgrade_operators)),
+            "downgrade": list(dict.fromkeys(cls.downgrade_operators)),
        }
-        with open(os.path.join(cls.migrate_location, version), "w", encoding="utf-8") as f:
-            json.dump(content, f, indent=2, ensure_ascii=False)
+        write_version_file(Path(cls.migrate_location, version), content)
        return version

    @classmethod
@@ -117,12 +126,9 @@ 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()

@@ -132,84 +138,27 @@ class Migrate:
        return await cls._generate_diff_sql(name)

    @classmethod
-    def _add_operator(cls, operator: str, upgrade=True, fk_m2m=False):
+    def _add_operator(cls, operator: str, upgrade=True, fk_m2m_index=False):
        """
        add operator,differentiate fk because fk is order limit
        :param operator:
        :param upgrade:
-        :param fk_m2m:
+        :param fk_m2m_index:
        :return:
        """
        if upgrade:
-            if fk_m2m:
+            if fk_m2m_index:
                cls._upgrade_fk_m2m_index_operators.append(operator)
            else:
                cls.upgrade_operators.append(operator)
        else:
-            if fk_m2m:
+            if fk_m2m_index:
                cls._downgrade_fk_m2m_index_operators.append(operator)
            else:
                cls.downgrade_operators.append(operator)

    @classmethod
-    def cp_models(
-        cls, app: str, model_files: List[str], old_model_file,
-    ):
-        """
-        cp currents models to old_model_files
-        :param app:
-        :param model_files:
-        :param old_model_file:
-        :return:
-        """
-        pattern = rf"(\n)?('|\")({app})(.\w+)('|\")"
-        for i, model_file in enumerate(model_files):
-            with open(model_file, "r", encoding="utf-8") 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, encoding="utf-8") as f:
-                f.write(f"{ret}\n")
-
-    @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:
-        """
-        path = os.path.join(location, app, cls.old_models)
-        path = path.replace(os.sep, ".").lstrip(".")
-        config["apps"][cls.diff_app] = {
-            "models": [path],
-            "default_connection": config.get("apps").get(app).get("default_connection", "default"),
-        }
-        return 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:
-        """
-        cls.app = app
-
-        old_model_files = []
-        models = config.get("apps").get(app).get("models")
-        for model in models:
-            old_model_files.append(import_module(model).__file__)
-
-        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:
@@ -217,178 +166,304 @@ class Migrate:
        :param upgrade:
        :return:
        """
-        old_models.pop(cls._aerich, None)
-        new_models.pop(cls._aerich, None)
+        _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])

-        for new_model_str, new_model in new_models.items():
            if new_model_str not in old_models.keys():
-                cls._add_operator(cls.add_model(new_model), upgrade)
+                if upgrade:
+                    cls._add_operator(cls.add_model(model), upgrade)
+                else:
+                    # we can't find origin model when downgrade, so skip
+                    pass
            else:
-                cls.diff_model(old_models.get(new_model_str), new_model, upgrade)
+                old_model_describe = old_models.get(new_model_str)
+                # rename table
+                new_table = new_model_describe.get("table")
+                old_table = old_model_describe.get("table")
+                if new_table != old_table:
+                    cls._add_operator(cls.rename_table(model, old_table, new_table), upgrade)
+                old_unique_together = set(
+                    map(lambda x: tuple(x), old_model_describe.get("unique_together"))
+                )
+                new_unique_together = set(
+                    map(lambda x: tuple(x), new_model_describe.get("unique_together"))
+                )
+                old_indexes = set(map(lambda x: tuple(x), old_model_describe.get("indexes", [])))
+                new_indexes = set(map(lambda x: tuple(x), new_model_describe.get("indexes", [])))
+                old_pk_field = old_model_describe.get("pk_field")
+                new_pk_field = new_model_describe.get("pk_field")
+                # pk field
+                changes = diff(old_pk_field, new_pk_field)
+                for action, option, change in changes:
+                    # current only support rename pk
+                    if action == "change" and option == "name":
+                        cls._add_operator(cls._rename_field(model, *change), upgrade)
+                # m2m fields
+                old_m2m_fields = old_model_describe.get("m2m_fields")
+                new_m2m_fields = new_model_describe.get("m2m_fields")
+                for action, option, change in diff(old_m2m_fields, new_m2m_fields):
+                    if change[0][0] == "db_constraint":
+                        continue
+                    table = change[0][1].get("through")
+                    if action == "add":
+                        add = False
+                        if upgrade and table not in cls._upgrade_m2m:
+                            cls._upgrade_m2m.append(table)
+                            add = True
+                        elif not upgrade and table not in cls._downgrade_m2m:
+                            cls._downgrade_m2m.append(table)
+                            add = True
+                        if add:
+                            cls._add_operator(
+                                cls.create_m2m(
+                                    model,
+                                    change[0][1],
+                                    new_models.get(change[0][1].get("model_name")),
+                                ),
+                                upgrade,
+                                fk_m2m_index=True,
+                            )
+                    elif action == "remove":
+                        add = False
+                        if upgrade and table not in cls._upgrade_m2m:
+                            cls._upgrade_m2m.append(table)
+                            add = True
+                        elif not upgrade and table not in cls._downgrade_m2m:
+                            cls._downgrade_m2m.append(table)
+                            add = True
+                        if add:
+                            cls._add_operator(cls.drop_m2m(table), upgrade, True)
+                # add unique_together
+                for index in new_unique_together.difference(old_unique_together):
+                    cls._add_operator(cls._add_index(model, index, True), upgrade, True)
+                # remove unique_together
+                for index in old_unique_together.difference(new_unique_together):
+                    cls._add_operator(cls._drop_index(model, index, True), upgrade, True)
+                # add indexes
+                for index in new_indexes.difference(old_indexes):
+                    cls._add_operator(cls._add_index(model, index, False), upgrade, True)
+                # remove indexes
+                for index in old_indexes.difference(new_indexes):
+                    cls._add_operator(cls._drop_index(model, index, False), upgrade, True)
+                old_data_fields = 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"),
+                                    ),
+                                )
+                                and old_data_field_name not in new_data_fields_name
+                            ):
+                                if upgrade:
+                                    is_rename = click.prompt(
+                                        f"Rename {old_data_field_name} to {new_data_field_name}?",
+                                        default=True,
+                                        type=bool,
+                                        show_choices=True,
+                                    )
+                                else:
+                                    is_rename = old_data_field_name in cls._rename_new
+                                if is_rename:
+                                    cls._rename_new.append(new_data_field_name)
+                                    cls._rename_old.append(old_data_field_name)
+                                    # only MySQL8+ has rename syntax
+                                    if (
+                                        cls.dialect == "mysql"
+                                        and cls._db_version
+                                        and cls._db_version.startswith("5.")
+                                    ):
+                                        cls._add_operator(
+                                            cls._change_field(
+                                                model, old_data_field, new_data_field
+                                            ),
+                                            upgrade,
+                                        )
+                                    else:
+                                        cls._add_operator(
+                                            cls._rename_field(model, *changes[1][2]),
+                                            upgrade,
+                                        )
+                    if not is_rename:
+                        cls._add_operator(
+                            cls._add_field(
+                                model,
+                                new_data_field,
+                            ),
+                            upgrade,
+                        )
+                # 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)
+                    )
+                    if fk_field.get("db_constraint"):
+                        cls._add_operator(
+                            cls._add_fk(
+                                model, fk_field, new_models.get(fk_field.get("python_type"))
+                            ),
+                            upgrade,
+                            fk_m2m_index=True,
+                        )
+                # drop fk
+                for old_fk_field_name in set(old_fk_fields_name).difference(
+                    set(new_fk_fields_name)
+                ):
+                    old_fk_field = next(
+                        filter(lambda x: x.get("name") == old_fk_field_name, old_fk_fields)
+                    )
+                    if old_fk_field.get("db_constraint"):
+                        cls._add_operator(
+                            cls._drop_fk(
+                                model, old_fk_field, old_models.get(old_fk_field.get("python_type"))
+                            ),
+                            upgrade,
+                            fk_m2m_index=True,
+                        )
+                # change fields
+                for field_name in set(new_data_fields_name).intersection(set(old_data_fields_name)):
+                    old_data_field = next(
+                        filter(lambda x: x.get("name") == field_name, old_data_fields)
+                    )
+                    new_data_field = next(
+                        filter(lambda x: x.get("name") == field_name, new_data_fields)
+                    )
+                    changes = diff(old_data_field, new_data_field)
+                    for change in changes:
+                        _, option, old_new = change
+                        if option == "indexed":
+                            # change index
+                            unique = new_data_field.get("unique")
+                            if old_new[0] is False and old_new[1] is True:
+                                cls._add_operator(
+                                    cls._add_index(model, (field_name,), unique), upgrade, True
+                                )
+                            else:
+                                cls._add_operator(
+                                    cls._drop_index(model, (field_name,), unique), upgrade, True
+                                )
+                        elif option == "db_field_types.":
+                            # continue since repeated with others
+                            continue
+                        elif option == "default":
+                            if not (
+                                is_default_function(old_new[0]) or is_default_function(old_new[1])
+                            ):
+                                # change column default
+                                cls._add_operator(
+                                    cls._alter_default(model, new_data_field), upgrade
+                                )
+                        elif option == "unique":
+                            # because indexed include it
+                            continue
+                        elif option == "nullable":
+                            # change nullable
+                            cls._add_operator(cls._alter_null(model, new_data_field), upgrade)
+                        else:
+                            # modify column
+                            cls._add_operator(
+                                cls._modify_field(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 _is_fk_m2m(cls, field: Field):
-        return isinstance(field, (ForeignKeyFieldInstance, ManyToManyFieldInstance))
+    def rename_table(cls, model: Type[Model], old_table_name: str, new_table_name: str):
+        return cls.ddl.rename_table(model, old_table_name, new_table_name)

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

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

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

-        old_unique_together = old_model._meta.unique_together
-        new_unique_together = new_model._meta.unique_together
-
-        old_fields_map = old_model._meta.fields_map
-        new_fields_map = new_model._meta.fields_map
-
-        old_keys = old_fields_map.keys()
-        new_keys = new_fields_map.keys()
-        for new_key in new_keys:
-            new_field = new_fields_map.get(new_key)
-            if cls._exclude_field(new_field, upgrade):
-                continue
-            if new_key not in old_keys:
-                new_field_dict = new_field.describe(serializable=True)
-                new_field_dict.pop("name", None)
-                new_field_dict.pop("db_column", None)
-                for diff_key in old_keys - new_keys:
-                    old_field = old_fields_map.get(diff_key)
-                    old_field_dict = old_field.describe(serializable=True)
-                    old_field_dict.pop("name", None)
-                    old_field_dict.pop("db_column", None)
-                    if old_field_dict == new_field_dict:
-                        if upgrade:
-                            is_rename = click.prompt(
-                                f"Rename {diff_key} to {new_key}?",
-                                default=True,
-                                type=bool,
-                                show_choices=True,
-                            )
-                            cls._rename_new.append(new_key)
-                            cls._rename_old.append(diff_key)
-                        else:
-                            is_rename = diff_key in cls._rename_new
-                        if is_rename:
-                            cls._add_operator(
-                                cls._rename_field(new_model, old_field, new_field), upgrade,
-                            )
-                            break
-                else:
-                    cls._add_operator(
-                        cls._add_field(new_model, new_field), upgrade, cls._is_fk_m2m(new_field),
-                    )
-            else:
-                old_field = old_fields_map.get(new_key)
-                new_field_dict = new_field.describe(serializable=True)
-                new_field_dict.pop("unique")
-                new_field_dict.pop("indexed")
-                old_field_dict = old_field.describe(serializable=True)
-                old_field_dict.pop("unique")
-                old_field_dict.pop("indexed")
-                if not cls._is_fk_m2m(new_field) and new_field_dict != old_field_dict:
-                    if cls.dialect == "postgres":
-                        if new_field.null != old_field.null:
-                            cls._add_operator(
-                                cls._alter_null(new_model, new_field), upgrade=upgrade
-                            )
-                        if new_field.default != old_field.default:
-                            cls._add_operator(
-                                cls._alter_default(new_model, new_field), upgrade=upgrade
-                            )
-                        if new_field.description != old_field.description:
-                            cls._add_operator(
-                                cls._set_comment(new_model, new_field), upgrade=upgrade
-                            )
-                        if new_field.field_type != old_field.field_type:
-                            cls._add_operator(
-                                cls._modify_field(new_model, new_field), upgrade=upgrade
-                            )
-                    else:
-                        cls._add_operator(cls._modify_field(new_model, new_field), upgrade=upgrade)
-                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,
-                        cls._is_fk_m2m(old_field),
-                    )
-                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,
-                        cls._is_fk_m2m(new_field),
-                    )
-                if isinstance(new_field, ForeignKeyFieldInstance):
-                    if old_field.db_constraint and not new_field.db_constraint:
-                        cls._add_operator(
-                            cls._drop_fk(new_model, new_field), upgrade, True,
-                        )
-                    if new_field.db_constraint and not old_field.db_constraint:
-                        cls._add_operator(
-                            cls._add_fk(new_model, new_field), upgrade, True,
-                        )
-
-        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):
-                if (upgrade and old_key not in cls._rename_old) or (
-                    not upgrade and old_key not in cls._rename_new
-                ):
-                    cls._add_operator(
-                        cls._remove_field(old_model, field), upgrade, cls._is_fk_m2m(field),
-                    )
-
-        for new_index in new_indexes:
-            if new_index not in old_indexes:
-                cls._add_operator(cls._add_index(new_model, new_index,), upgrade)
-        for old_index in old_indexes:
-            if old_index not in new_indexes:
-                cls._add_operator(cls._remove_index(old_model, old_index), upgrade)
-
-        for new_unique in new_unique_together:
-            if new_unique not in old_unique_together:
-                cls._add_operator(cls._add_index(new_model, new_unique, unique=True), upgrade)
-
-        for old_unique in old_unique_together:
-            if old_unique not in new_unique_together:
-                cls._add_operator(cls._remove_index(old_model, old_unique, unique=True), upgrade)
+    @classmethod
+    def drop_m2m(cls, table_name: str):
+        return cls.ddl.drop_m2m(table_name)

    @classmethod
    def _resolve_fk_fields_name(cls, model: Type[Model], fields_name: Tuple[str]):
        ret = []
        for field_name in fields_name:
-            if field_name in model._meta.fk_fields:
+            field = model._meta.fields_map[field_name]
+            if field.source_field:
+                ret.append(field.source_field)
+            elif field_name in model._meta.fk_fields:
                ret.append(field_name + "_id")
            else:
                ret.append(field_name)
        return ret

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

@@ -398,87 +473,57 @@ 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 _alter_default(cls, model: Type[Model], field: Field):
-        return cls.ddl.alter_column_default(model, field)
+    def _alter_null(cls, model: Type[Model], field_describe: dict):
+        return cls.ddl.alter_column_null(model, field_describe)

    @classmethod
-    def _alter_null(cls, model: Type[Model], field: Field):
-        return cls.ddl.alter_column_null(model, field)
+    def _set_comment(cls, model: Type[Model], field_describe: dict):
+        return cls.ddl.set_comment(model, field_describe)

    @classmethod
-    def _set_comment(cls, model: Type[Model], field: Field):
-        return cls.ddl.set_comment(model, field)
+    def _modify_field(cls, model: Type[Model], field_describe: dict):
+        return cls.ddl.modify_column(model, field_describe)

    @classmethod
-    def _modify_field(cls, model: Type[Model], field: Field):
-        return cls.ddl.modify_column(model, field)
+    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 _drop_fk(cls, model: Type[Model], field: ForeignKeyFieldInstance):
-        return cls.ddl.drop_fk(model, field)
+    def _remove_field(cls, model: Type[Model], column_name: str):
+        return cls.ddl.drop_column(model, column_name)

    @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 _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 _rename_field(cls, model: Type[Model], old_field: Field, new_field: Field):
-        return cls.ddl.rename_column(model, old_field.model_field_name, new_field.model_field_name)
+    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: ForeignKeyFieldInstance):
+    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
@@ -6,6 +6,7 @@ MAX_VERSION_LENGTH = 255
 class Aerich(Model):
    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 +1,44 @@
 import importlib
+import os
+import re
+import sys
+from pathlib import Path
+from typing import Dict, Union

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


-def get_app_connection_name(config, app) -> str:
+def add_src_path(path: str) -> str:
+    """
+    add a folder to the paths so we can import from there
+    :param path: path to add
+    :return: absolute path
+    """
+    if not os.path.isabs(path):
+        # use the absolute path, otherwise some other things (e.g. __file__) won't work properly
+        path = os.path.abspath(path)
+    if not os.path.isdir(path):
+        raise ClickException(f"Specified source folder does not exist: {path}")
+    if path not in sys.path:
+        sys.path.insert(0, path)
+    return path
+
+
+def get_app_connection_name(config, app_name: str) -> str:
    """
    get connection name
    :param config:
-    :param app:
+    :param app_name:
    :return:
    """
-    return config.get("apps").get(app).get("default_connection", "default")
+    app = config.get("apps").get(app_name)
+    if app:
+        return app.get("default_connection", "default")
+    raise BadOptionUsage(
+        option_name="--app",
+        message=f'Can\'t get app named "{app_name}"',
+    )


 def get_app_connection(config, app) -> BaseDBAsyncClient:
@@ -34,12 +61,11 @@ def get_tortoise_config(ctx: Context, tortoise_orm: str) -> dict:
    splits = tortoise_orm.split(".")
    config_path = ".".join(splits[:-1])
    tortoise_config = splits[-1]
+
    try:
        config_module = importlib.import_module(config_path)
-    except (ModuleNotFoundError, AttributeError):
-        raise BadOptionUsage(
-            ctx=ctx, message=f'No config named "{config_path}"', option_name="--config"
-        )
+    except ModuleNotFoundError as e:
+        raise ClickException(f"Error while importing configuration module: {e}") from None

    config = getattr(config_module, tortoise_config, None)
    if not config:
@@ -49,3 +75,74 @@ 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: Union[str, Path]) -> 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: Path, 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))
+            if not upgrade[-1].endswith(";"):
+                f.write(";\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
+
+
+def is_default_function(string: str):
+    return re.match(r"^<function.+>$", str(string or ""))
--- a/aerich/version.py
+++ b/aerich/version.py
@@ -0,0 +1 @@
+__version__ = "0.6.0"
--- a/conftest.py
+++ b/conftest.py
@@ -13,10 +13,15 @@ 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)},
+    "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"},
    },
 }

@@ -31,7 +36,7 @@ def reset_migrate():
    Migrate._downgrade_m2m = []


-@pytest.yield_fixture(scope="session")
+@pytest.fixture(scope="session")
 def event_loop():
    policy = asyncio.get_event_loop_policy()
    res = policy.new_event_loop()
@@ -46,12 +51,6 @@ def event_loop():

@pytest.fixture(scope="session", autouse=True)
 async def initialize_tests(event_loop, request):
-    tortoise_orm["connections"]["diff_models"] = "sqlite://:memory:"
-    tortoise_orm["apps"]["diff_models"] = {
-        "models": ["tests.diff_models"],
-        "default_connection": "diff_models",
-    }
-
    await Tortoise.init(config=tortoise_orm, _create_db=True)
    await generate_schema_for_client(Tortoise.get_connection("default"), safe=True)

@@ -62,5 +61,5 @@ async def initialize_tests(event_loop, request):
        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
@@ -1,13 +1,13 @@
 [tool.poetry]
 name = "aerich"
-version = "0.2.5"
+version = "0.6.0"
 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"
+homepage = "https://github.com/tortoise/aerich"
+repository = "https://github.com/tortoise/aerich.git"
+documentation = "https://github.com/tortoise/aerich"
 keywords = ["migrate", "Tortoise-ORM", "mysql"]
 packages = [
    { include = "aerich" }
@@ -16,24 +16,28 @@ include = ["CHANGELOG.md", "LICENSE", "README.md"]

 [tool.poetry.dependencies]
 python = "^3.7"
-tortoise-orm = "*"
+tortoise-orm = "^0.17.7"
 click = "*"
-pydantic = "*"
-aiomysql = {version = "*", optional = true}
-asyncpg = {version = "*", optional = true}
+asyncpg = { version = "*", optional = true }
+asyncmy = { version = "*", optional = true }
+ddlparse = "*"
+dictdiffer = "*"
+tomlkit = "*"

 [tool.poetry.dev-dependencies]
 flake8 = "*"
 isort = "*"
-black = "^19.10b0"
+black = "*"
 pytest = "*"
 pytest-xdist = "*"
 pytest-asyncio = "*"
 bandit = "*"
 pytest-mock = "*"
+cryptography = "*"

 [tool.poetry.extras]
-dbdrivers = ["aiomysql", "asyncpg"]
+asyncmy = ["asyncmy"]
+asyncpg = ["asyncpg"]

 [build-system]
 requires = ["poetry>=0.12"]
--- a/tests/models.py
+++ b/tests/models.py
@@ -1,4 +1,5 @@
 import datetime
+import uuid
 from enum import IntEnum

 from tortoise import Model, fields
@@ -23,23 +24,28 @@ 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 = fields.CharField(max_length=200)
+    email_id = fields.IntField(pk=True)
+    email = fields.CharField(max_length=200, index=True)
    is_primary = fields.BooleanField(default=False)
-    user = fields.ForeignKeyField("models.User", db_constraint=False)
+    address = fields.CharField(max_length=200)
+    users = fields.ManyToManyField("models.User")
+
+
+def default_name():
+    return uuid.uuid4()


 class Category(Model):
-    slug = fields.CharField(max_length=200)
-    name = fields.CharField(max_length=200)
+    slug = fields.CharField(max_length=100)
+    name = fields.CharField(max_length=200, null=True, default=default_name)
    user = fields.ForeignKeyField("models.User", description="User")
    created_at = fields.DatetimeField(auto_now_add=True)

@@ -47,17 +53,28 @@ class Category(Model):
 class Product(Model):
    categories = fields.ManyToManyField("models.Category")
    name = fields.CharField(max_length=50)
-    view_num = fields.IntField(description="View Num")
+    view_num = fields.IntField(description="View Num", default=0)
    sort = fields.IntField()
    is_reviewed = fields.BooleanField(description="Is Reviewed")
-    type = fields.IntEnumField(ProductType, description="Product Type")
-    image = fields.CharField(max_length=200)
+    type = fields.IntEnumField(
+        ProductType, description="Product Type", source_field="type_db_alias"
+    )
+    pic = fields.CharField(max_length=200)
    body = fields.TextField()
    created_at = fields.DatetimeField(auto_now_add=True)

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

 class Config(Model):
    label = fields.CharField(max_length=200)
    key = fields.CharField(max_length=20)
    value = fields.JSONField()
-    status: Status = fields.IntEnumField(Status, default=Status.on)
+    status: Status = fields.IntEnumField(Status)
+    user = fields.ForeignKeyField("models.User", description="User")
+
+
+class NewModel(Model):
+    name = fields.CharField(max_length=50)
--- a/tests/models_second.py
+++ b/tests/models_second.py
@@ -0,0 +1,65 @@
+import datetime
+from enum import IntEnum
+
+from tortoise import Model, fields
+
+
+class ProductType(IntEnum):
+    article = 1
+    page = 2
+
+
+class PermissionAction(IntEnum):
+    create = 1
+    delete = 2
+    update = 3
+    read = 4
+
+
+class Status(IntEnum):
+    on = 1
+    off = 0
+
+
+class User(Model):
+    username = fields.CharField(max_length=20, unique=True)
+    password = fields.CharField(max_length=200)
+    last_login = fields.DatetimeField(description="Last Login", default=datetime.datetime.now)
+    is_active = fields.BooleanField(default=True, description="Is Active")
+    is_superuser = fields.BooleanField(default=False, description="Is SuperUser")
+    avatar = fields.CharField(max_length=200, default="")
+    intro = fields.TextField(default="")
+
+
+class Email(Model):
+    email = fields.CharField(max_length=200)
+    is_primary = fields.BooleanField(default=False)
+    user = fields.ForeignKeyField("models_second.User", db_constraint=False)
+
+
+class Category(Model):
+    slug = fields.CharField(max_length=200)
+    name = fields.CharField(max_length=200)
+    user = fields.ForeignKeyField("models_second.User", description="User")
+    created_at = fields.DatetimeField(auto_now_add=True)
+
+
+class Product(Model):
+    categories = fields.ManyToManyField("models_second.Category")
+    name = fields.CharField(max_length=50)
+    view_num = fields.IntField(description="View Num")
+    sort = fields.IntField()
+    is_reviewed = fields.BooleanField(description="Is Reviewed")
+    type = fields.IntEnumField(
+        ProductType, description="Product Type", source_field="type_db_alias"
+    )
+    image = fields.CharField(max_length=200)
+    body = fields.TextField()
+    created_at = fields.DatetimeField(auto_now_add=True)
+
+
+class Config(Model):
+    label = fields.CharField(max_length=200)
+    key = fields.CharField(max_length=20)
+    value = fields.JSONField()
+    status: Status = fields.IntEnumField(Status, default=Status.on)
--- a/tests/diff_models.py
+++ b/tests/diff_models.py
@@ -24,7 +24,7 @@ class Status(IntEnum):
 class User(Model):
    username = fields.CharField(max_length=20)
    password = fields.CharField(max_length=200)
-    last_login_at = fields.DatetimeField(description="Last Login", default=datetime.datetime.now)
+    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="")
@@ -34,22 +34,25 @@ class User(Model):
 class Email(Model):
    email = fields.CharField(max_length=200)
    is_primary = fields.BooleanField(default=False)
-    user = fields.ForeignKeyField("diff_models.User", db_constraint=True)
+    user = fields.ForeignKeyField("models.User", db_constraint=False)


 class Category(Model):
    slug = fields.CharField(max_length=200)
-    user = fields.ForeignKeyField("diff_models.User", description="User")
+    name = fields.CharField(max_length=200)
+    user = fields.ForeignKeyField("models.User", description="User")
    created_at = fields.DatetimeField(auto_now_add=True)


 class Product(Model):
-    categories = fields.ManyToManyField("diff_models.Category")
+    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")
+    type = fields.IntEnumField(
+        ProductType, description="Product Type", source_field="type_db_alias"
+    )
    image = fields.CharField(max_length=200)
    body = fields.TextField()
    created_at = fields.DatetimeField(auto_now_add=True)
@@ -60,3 +63,6 @@ class Config(Model):
    key = fields.CharField(max_length=20)
    value = fields.JSONField()
    status: Status = fields.IntEnumField(Status, default=Status.on)
+
+    class Meta:
+        table = "configs"
--- a/tests/test_ddl.py
+++ b/tests/test_ddl.py
@@ -1,11 +1,8 @@
-import pytest
-
 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 tests.models import Category, User
+from tests.models import Category, Product, User


 def test_create_table():
@@ -15,8 +12,8 @@ def test_create_table():
            ret
            == """CREATE TABLE IF NOT EXISTS `category` (
    `id` INT NOT NULL PRIMARY KEY AUTO_INCREMENT,
-    `slug` VARCHAR(200) NOT NULL,
-    `name` VARCHAR(200) NOT NULL,
+    `slug` VARCHAR(100) NOT NULL,
+    `name` VARCHAR(200),
    `created_at` DATETIME(6) NOT NULL  DEFAULT CURRENT_TIMESTAMP(6),
    `user_id` INT NOT NULL COMMENT 'User',
    CONSTRAINT `fk_category_user_e2e3874c` FOREIGN KEY (`user_id`) REFERENCES `user` (`id`) ON DELETE CASCADE
@@ -28,8 +25,8 @@ def test_create_table():
            ret
            == """CREATE TABLE IF NOT EXISTS "category" (
    "id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
-    "slug" VARCHAR(200) NOT NULL,
-    "name" VARCHAR(200) NOT NULL,
+    "slug" VARCHAR(100) NOT NULL,
+    "name" VARCHAR(200),
    "created_at" TIMESTAMP NOT NULL  DEFAULT CURRENT_TIMESTAMP,
    "user_id" INT NOT NULL REFERENCES "user" ("id") ON DELETE CASCADE /* User */
 );"""
@@ -40,9 +37,9 @@ def test_create_table():
            ret
            == """CREATE TABLE IF NOT EXISTS "category" (
    "id" SERIAL NOT NULL PRIMARY KEY,
-    "slug" VARCHAR(200) NOT NULL,
-    "name" VARCHAR(200) NOT NULL,
-    "created_at" TIMESTAMP NOT NULL  DEFAULT CURRENT_TIMESTAMP,
+    "slug" VARCHAR(100) NOT NULL,
+    "name" VARCHAR(200),
+    "created_at" TIMESTAMPTZ NOT NULL  DEFAULT CURRENT_TIMESTAMP,
    "user_id" INT NOT NULL REFERENCES "user" ("id") ON DELETE CASCADE
 );
 COMMENT ON COLUMN "category"."user_id" IS 'User';"""
@@ -50,7 +47,7 @@ COMMENT ON COLUMN "category"."user_id" IS 'User';"""


 def test_drop_table():
-    ret = Migrate.ddl.drop_table(Category)
+    ret = Migrate.ddl.drop_table(Category._meta.db_table)
    if isinstance(Migrate.ddl, MysqlDDL):
        assert ret == "DROP TABLE IF EXISTS `category`"
    else:
@@ -58,26 +55,28 @@ def test_drop_table():


 def test_add_column():
-    ret = Migrate.ddl.add_column(Category, Category._meta.fields_map.get("name"))
+    ret = Migrate.ddl.add_column(Category, Category._meta.fields_map.get("name").describe(False))
    if isinstance(Migrate.ddl, MysqlDDL):
-        assert ret == "ALTER TABLE `category` ADD `name` VARCHAR(200) NOT NULL"
+        assert ret == "ALTER TABLE `category` ADD `name` VARCHAR(200)"
    else:
-        assert ret == 'ALTER TABLE "category" ADD "name" VARCHAR(200) NOT NULL'
+        assert ret == 'ALTER TABLE "category" ADD "name" VARCHAR(200)'


 def test_modify_column():
    if isinstance(Migrate.ddl, SqliteDDL):
-        with pytest.raises(NotSupportError):
-            ret0 = Migrate.ddl.modify_column(Category, Category._meta.fields_map.get("name"))
-            ret1 = Migrate.ddl.modify_column(User, User._meta.fields_map.get("is_active"))
+        return

-    else:
-        ret0 = Migrate.ddl.modify_column(Category, Category._meta.fields_map.get("name"))
-        ret1 = Migrate.ddl.modify_column(User, User._meta.fields_map.get("is_active"))
+    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"
+        assert ret0 == "ALTER TABLE `category` MODIFY COLUMN `name` VARCHAR(200)"
    elif isinstance(Migrate.ddl, PostgresDDL):
-        assert ret0 == 'ALTER TABLE "category" ALTER COLUMN "name" TYPE VARCHAR(200)'
+        assert (
+            ret0
+            == 'ALTER TABLE "category" ALTER COLUMN "name" TYPE VARCHAR(200) USING "name"::VARCHAR(200)'
+        )

    if isinstance(Migrate.ddl, MysqlDDL):
        assert (
@@ -85,59 +84,64 @@ def test_modify_column():
            == "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'
+        assert (
+            ret1 == 'ALTER TABLE "user" ALTER COLUMN "is_active" TYPE BOOL USING "is_active"::BOOL'
+        )


 def test_alter_column_default():
-    ret = Migrate.ddl.alter_column_default(Category, Category._meta.fields_map.get("name"))
+    if isinstance(Migrate.ddl, SqliteDDL):
+        return
+    ret = Migrate.ddl.alter_column_default(User, User._meta.fields_map.get("intro").describe(False))
    if isinstance(Migrate.ddl, PostgresDDL):
-        assert ret == 'ALTER TABLE "category" ALTER COLUMN "name" DROP DEFAULT'
-    else:
-        assert ret is None
+        assert ret == 'ALTER TABLE "user" ALTER COLUMN "intro" SET DEFAULT \'\''
+    elif isinstance(Migrate.ddl, MysqlDDL):
+        assert ret == "ALTER TABLE `user` ALTER COLUMN `intro` SET DEFAULT ''"

-    ret = Migrate.ddl.alter_column_default(Category, Category._meta.fields_map.get("created_at"))
+    ret = Migrate.ddl.alter_column_default(
+        Category, Category._meta.fields_map.get("created_at").describe(False)
+    )
    if isinstance(Migrate.ddl, PostgresDDL):
        assert (
            ret == 'ALTER TABLE "category" ALTER COLUMN "created_at" SET DEFAULT CURRENT_TIMESTAMP'
        )
-    else:
-        assert ret is None
+    elif isinstance(Migrate.ddl, MysqlDDL):
+        assert (
+            ret
+            == "ALTER TABLE `category` ALTER COLUMN `created_at` SET DEFAULT CURRENT_TIMESTAMP(6)"
+        )

-    ret = Migrate.ddl.alter_column_default(User, User._meta.fields_map.get("avatar"))
+    ret = Migrate.ddl.alter_column_default(
+        Product, Product._meta.fields_map.get("view_num").describe(False)
+    )
    if isinstance(Migrate.ddl, PostgresDDL):
-        assert ret == 'ALTER TABLE "user" ALTER COLUMN "avatar" SET DEFAULT \'\''
-    else:
-        assert ret is None
+        assert ret == 'ALTER TABLE "product" ALTER COLUMN "view_num" SET DEFAULT 0'
+    elif isinstance(Migrate.ddl, MysqlDDL):
+        assert ret == "ALTER TABLE `product` ALTER COLUMN `view_num` SET DEFAULT 0"


 def test_alter_column_null():
-    ret = Migrate.ddl.alter_column_null(Category, Category._meta.fields_map.get("name"))
+    if isinstance(Migrate.ddl, (SqliteDDL, MysqlDDL)):
+        return
+    ret = Migrate.ddl.alter_column_null(
+        Category, Category._meta.fields_map.get("name").describe(False)
+    )
    if isinstance(Migrate.ddl, PostgresDDL):
-        assert ret == 'ALTER TABLE "category" ALTER COLUMN "name" SET NOT NULL'
-    else:
-        assert ret is None
+        assert ret == 'ALTER TABLE "category" ALTER COLUMN "name" DROP NOT NULL'


 def test_set_comment():
-    ret = Migrate.ddl.set_comment(Category, Category._meta.fields_map.get("name"))
-    if isinstance(Migrate.ddl, PostgresDDL):
-        assert ret == 'COMMENT ON COLUMN "category"."name" IS NULL'
-    else:
-        assert ret is None
+    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"))
-    if isinstance(Migrate.ddl, PostgresDDL):
-        assert ret == 'COMMENT ON COLUMN "category"."user" IS \'User\''
-    else:
-        assert ret is None
+    ret = Migrate.ddl.set_comment(Category, Category._meta.fields_map.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")
+    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):
@@ -148,18 +152,15 @@ 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 == "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
-            == 'ALTER TABLE "category" ADD CONSTRAINT "uid_category_name_8b0cb9" UNIQUE ("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 == 'ALTER TABLE "category" ADD INDEX "idx_category_name_8b0cb9" ("name")'
        assert (
            index_u == 'ALTER TABLE "category" ADD UNIQUE INDEX "uid_category_name_8b0cb9" ("name")'
        )
@@ -173,14 +174,16 @@ def test_drop_index():
        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 == 'ALTER TABLE "category" DROP CONSTRAINT "uid_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"))
+    ret = Migrate.ddl.add_fk(
+        Category, Category._meta.fields_map.get("user").describe(False), User.describe(False)
+    )
    if isinstance(Migrate.ddl, MysqlDDL):
        assert (
            ret
@@ -194,7 +197,9 @@ def test_add_fk():


 def test_drop_fk():
-    ret = Migrate.ddl.drop_fk(Category, Category._meta.fields_map.get("user"))
+    ret = Migrate.ddl.drop_fk(
+        Category, Category._meta.fields_map.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):
--- a/tests/test_migrate.py
+++ b/tests/test_migrate.py
@@ -1,60 +1,890 @@
 import pytest
 from pytest_mock import MockerFixture
-from tortoise import Tortoise

 from aerich.ddl.mysql import MysqlDDL
 from aerich.ddl.postgres import PostgresDDL
 from aerich.ddl.sqlite import SqliteDDL
 from aerich.exceptions import NotSupportError
 from aerich.migrate import Migrate
+from aerich.utils import get_models_describe
+
+old_models_describe = {
+    "models.Category": {
+        "name": "models.Category",
+        "app": "models",
+        "table": "category",
+        "abstract": False,
+        "description": None,
+        "docstring": None,
+        "unique_together": [],
+        "indexes": [],
+        "pk_field": {
+            "name": "id",
+            "field_type": "IntField",
+            "db_column": "id",
+            "python_type": "int",
+            "generated": True,
+            "nullable": False,
+            "unique": True,
+            "indexed": True,
+            "default": None,
+            "description": None,
+            "docstring": None,
+            "constraints": {"ge": 1, "le": 2147483647},
+            "db_field_types": {"": "INT"},
+        },
+        "data_fields": [
+            {
+                "name": "slug",
+                "field_type": "CharField",
+                "db_column": "slug",
+                "python_type": "str",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"max_length": 200},
+                "db_field_types": {"": "VARCHAR(200)"},
+            },
+            {
+                "name": "name",
+                "field_type": "CharField",
+                "db_column": "name",
+                "python_type": "str",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"max_length": 200},
+                "db_field_types": {"": "VARCHAR(200)"},
+            },
+            {
+                "name": "created_at",
+                "field_type": "DatetimeField",
+                "db_column": "created_at",
+                "python_type": "datetime.datetime",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"readOnly": True},
+                "db_field_types": {
+                    "": "TIMESTAMP",
+                    "mysql": "DATETIME(6)",
+                    "postgres": "TIMESTAMPTZ",
+                },
+                "auto_now_add": True,
+                "auto_now": False,
+            },
+            {
+                "name": "user_id",
+                "field_type": "IntField",
+                "db_column": "user_id",
+                "python_type": "int",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": "User",
+                "docstring": None,
+                "constraints": {"ge": 1, "le": 2147483647},
+                "db_field_types": {"": "INT"},
+            },
+        ],
+        "fk_fields": [
+            {
+                "name": "user",
+                "field_type": "ForeignKeyFieldInstance",
+                "python_type": "models.User",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": "User",
+                "docstring": None,
+                "constraints": {},
+                "raw_field": "user_id",
+                "on_delete": "CASCADE",
+            }
+        ],
+        "backward_fk_fields": [],
+        "o2o_fields": [],
+        "backward_o2o_fields": [],
+        "m2m_fields": [
+            {
+                "name": "products",
+                "field_type": "ManyToManyFieldInstance",
+                "python_type": "models.Product",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {},
+                "model_name": "models.Product",
+                "related_name": "categories",
+                "forward_key": "product_id",
+                "backward_key": "category_id",
+                "through": "product_category",
+                "on_delete": "CASCADE",
+                "_generated": True,
+            }
+        ],
+    },
+    "models.Config": {
+        "name": "models.Config",
+        "app": "models",
+        "table": "configs",
+        "abstract": False,
+        "description": None,
+        "docstring": None,
+        "unique_together": [],
+        "indexes": [],
+        "pk_field": {
+            "name": "id",
+            "field_type": "IntField",
+            "db_column": "id",
+            "python_type": "int",
+            "generated": True,
+            "nullable": False,
+            "unique": True,
+            "indexed": True,
+            "default": None,
+            "description": None,
+            "docstring": None,
+            "constraints": {"ge": 1, "le": 2147483647},
+            "db_field_types": {"": "INT"},
+        },
+        "data_fields": [
+            {
+                "name": "label",
+                "field_type": "CharField",
+                "db_column": "label",
+                "python_type": "str",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"max_length": 200},
+                "db_field_types": {"": "VARCHAR(200)"},
+            },
+            {
+                "name": "key",
+                "field_type": "CharField",
+                "db_column": "key",
+                "python_type": "str",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"max_length": 20},
+                "db_field_types": {"": "VARCHAR(20)"},
+            },
+            {
+                "name": "value",
+                "field_type": "JSONField",
+                "db_column": "value",
+                "python_type": "Union[dict, list]",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {},
+                "db_field_types": {"": "TEXT", "postgres": "JSONB"},
+            },
+            {
+                "name": "status",
+                "field_type": "IntEnumFieldInstance",
+                "db_column": "status",
+                "python_type": "int",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": 1,
+                "description": "on: 1\noff: 0",
+                "docstring": None,
+                "constraints": {"ge": -32768, "le": 32767},
+                "db_field_types": {"": "SMALLINT"},
+            },
+        ],
+        "fk_fields": [],
+        "backward_fk_fields": [],
+        "o2o_fields": [],
+        "backward_o2o_fields": [],
+        "m2m_fields": [],
+    },
+    "models.Email": {
+        "name": "models.Email",
+        "app": "models",
+        "table": "email",
+        "abstract": False,
+        "description": None,
+        "docstring": None,
+        "unique_together": [],
+        "indexes": [],
+        "pk_field": {
+            "name": "id",
+            "field_type": "IntField",
+            "db_column": "id",
+            "python_type": "int",
+            "generated": True,
+            "nullable": False,
+            "unique": True,
+            "indexed": True,
+            "default": None,
+            "description": None,
+            "docstring": None,
+            "constraints": {"ge": 1, "le": 2147483647},
+            "db_field_types": {"": "INT"},
+        },
+        "data_fields": [
+            {
+                "name": "email",
+                "field_type": "CharField",
+                "db_column": "email",
+                "python_type": "str",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"max_length": 200},
+                "db_field_types": {"": "VARCHAR(200)"},
+            },
+            {
+                "name": "is_primary",
+                "field_type": "BooleanField",
+                "db_column": "is_primary",
+                "python_type": "bool",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": False,
+                "description": None,
+                "docstring": None,
+                "constraints": {},
+                "db_field_types": {"": "BOOL", "sqlite": "INT"},
+            },
+            {
+                "name": "user_id",
+                "field_type": "IntField",
+                "db_column": "user_id",
+                "python_type": "int",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"ge": 1, "le": 2147483647},
+                "db_field_types": {"": "INT"},
+            },
+        ],
+        "fk_fields": [
+            {
+                "name": "user",
+                "field_type": "ForeignKeyFieldInstance",
+                "python_type": "models.User",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {},
+                "raw_field": "user_id",
+                "on_delete": "CASCADE",
+            }
+        ],
+        "backward_fk_fields": [],
+        "o2o_fields": [],
+        "backward_o2o_fields": [],
+        "m2m_fields": [],
+    },
+    "models.Product": {
+        "name": "models.Product",
+        "app": "models",
+        "table": "product",
+        "abstract": False,
+        "description": None,
+        "docstring": None,
+        "unique_together": [],
+        "indexes": [],
+        "pk_field": {
+            "name": "id",
+            "field_type": "IntField",
+            "db_column": "id",
+            "python_type": "int",
+            "generated": True,
+            "nullable": False,
+            "unique": True,
+            "indexed": True,
+            "default": None,
+            "description": None,
+            "docstring": None,
+            "constraints": {"ge": 1, "le": 2147483647},
+            "db_field_types": {"": "INT"},
+        },
+        "data_fields": [
+            {
+                "name": "name",
+                "field_type": "CharField",
+                "db_column": "name",
+                "python_type": "str",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"max_length": 50},
+                "db_field_types": {"": "VARCHAR(50)"},
+            },
+            {
+                "name": "view_num",
+                "field_type": "IntField",
+                "db_column": "view_num",
+                "python_type": "int",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": "View Num",
+                "docstring": None,
+                "constraints": {"ge": -2147483648, "le": 2147483647},
+                "db_field_types": {"": "INT"},
+            },
+            {
+                "name": "sort",
+                "field_type": "IntField",
+                "db_column": "sort",
+                "python_type": "int",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"ge": -2147483648, "le": 2147483647},
+                "db_field_types": {"": "INT"},
+            },
+            {
+                "name": "is_reviewed",
+                "field_type": "BooleanField",
+                "db_column": "is_reviewed",
+                "python_type": "bool",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": "Is Reviewed",
+                "docstring": None,
+                "constraints": {},
+                "db_field_types": {"": "BOOL", "sqlite": "INT"},
+            },
+            {
+                "name": "type",
+                "field_type": "IntEnumFieldInstance",
+                "db_column": "type_db_alias",
+                "python_type": "int",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": "Product Type",
+                "docstring": None,
+                "constraints": {"ge": -32768, "le": 32767},
+                "db_field_types": {"": "SMALLINT"},
+            },
+            {
+                "name": "image",
+                "field_type": "CharField",
+                "db_column": "image",
+                "python_type": "str",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"max_length": 200},
+                "db_field_types": {"": "VARCHAR(200)"},
+            },
+            {
+                "name": "body",
+                "field_type": "TextField",
+                "db_column": "body",
+                "python_type": "str",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {},
+                "db_field_types": {"": "TEXT", "mysql": "LONGTEXT"},
+            },
+            {
+                "name": "created_at",
+                "field_type": "DatetimeField",
+                "db_column": "created_at",
+                "python_type": "datetime.datetime",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"readOnly": True},
+                "db_field_types": {
+                    "": "TIMESTAMP",
+                    "mysql": "DATETIME(6)",
+                    "postgres": "TIMESTAMPTZ",
+                },
+                "auto_now_add": True,
+                "auto_now": False,
+            },
+        ],
+        "fk_fields": [],
+        "backward_fk_fields": [],
+        "o2o_fields": [],
+        "backward_o2o_fields": [],
+        "m2m_fields": [
+            {
+                "name": "categories",
+                "field_type": "ManyToManyFieldInstance",
+                "python_type": "models.Category",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {},
+                "model_name": "models.Category",
+                "related_name": "products",
+                "forward_key": "category_id",
+                "backward_key": "product_id",
+                "through": "product_category",
+                "on_delete": "CASCADE",
+                "_generated": False,
+            }
+        ],
+    },
+    "models.User": {
+        "name": "models.User",
+        "app": "models",
+        "table": "user",
+        "abstract": False,
+        "description": None,
+        "docstring": None,
+        "unique_together": [],
+        "indexes": [],
+        "pk_field": {
+            "name": "id",
+            "field_type": "IntField",
+            "db_column": "id",
+            "python_type": "int",
+            "generated": True,
+            "nullable": False,
+            "unique": True,
+            "indexed": True,
+            "default": None,
+            "description": None,
+            "docstring": None,
+            "constraints": {"ge": 1, "le": 2147483647},
+            "db_field_types": {"": "INT"},
+        },
+        "data_fields": [
+            {
+                "name": "username",
+                "field_type": "CharField",
+                "db_column": "username",
+                "python_type": "str",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"max_length": 20},
+                "db_field_types": {"": "VARCHAR(20)"},
+            },
+            {
+                "name": "password",
+                "field_type": "CharField",
+                "db_column": "password",
+                "python_type": "str",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"max_length": 200},
+                "db_field_types": {"": "VARCHAR(200)"},
+            },
+            {
+                "name": "last_login",
+                "field_type": "DatetimeField",
+                "db_column": "last_login",
+                "python_type": "datetime.datetime",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": "<function None.now>",
+                "description": "Last Login",
+                "docstring": None,
+                "constraints": {},
+                "db_field_types": {
+                    "": "TIMESTAMP",
+                    "mysql": "DATETIME(6)",
+                    "postgres": "TIMESTAMPTZ",
+                },
+                "auto_now_add": False,
+                "auto_now": False,
+            },
+            {
+                "name": "is_active",
+                "field_type": "BooleanField",
+                "db_column": "is_active",
+                "python_type": "bool",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": True,
+                "description": "Is Active",
+                "docstring": None,
+                "constraints": {},
+                "db_field_types": {"": "BOOL", "sqlite": "INT"},
+            },
+            {
+                "name": "is_superuser",
+                "field_type": "BooleanField",
+                "db_column": "is_superuser",
+                "python_type": "bool",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": False,
+                "description": "Is SuperUser",
+                "docstring": None,
+                "constraints": {},
+                "db_field_types": {"": "BOOL", "sqlite": "INT"},
+            },
+            {
+                "name": "avatar",
+                "field_type": "CharField",
+                "db_column": "avatar",
+                "python_type": "str",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": "",
+                "description": None,
+                "docstring": None,
+                "constraints": {"max_length": 200},
+                "db_field_types": {"": "VARCHAR(200)"},
+            },
+            {
+                "name": "intro",
+                "field_type": "TextField",
+                "db_column": "intro",
+                "python_type": "str",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": "",
+                "description": None,
+                "docstring": None,
+                "constraints": {},
+                "db_field_types": {"": "TEXT", "mysql": "LONGTEXT"},
+            },
+        ],
+        "fk_fields": [],
+        "backward_fk_fields": [
+            {
+                "name": "categorys",
+                "field_type": "BackwardFKRelation",
+                "python_type": "models.Category",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": "User",
+                "docstring": None,
+                "constraints": {},
+            },
+            {
+                "name": "emails",
+                "field_type": "BackwardFKRelation",
+                "python_type": "models.Email",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {},
+            },
+        ],
+        "o2o_fields": [],
+        "backward_o2o_fields": [],
+        "m2m_fields": [],
+    },
+    "models.Aerich": {
+        "name": "models.Aerich",
+        "app": "models",
+        "table": "aerich",
+        "abstract": False,
+        "description": None,
+        "docstring": None,
+        "unique_together": [],
+        "indexes": [],
+        "pk_field": {
+            "name": "id",
+            "field_type": "IntField",
+            "db_column": "id",
+            "python_type": "int",
+            "generated": True,
+            "nullable": False,
+            "unique": True,
+            "indexed": True,
+            "default": None,
+            "description": None,
+            "docstring": None,
+            "constraints": {"ge": 1, "le": 2147483647},
+            "db_field_types": {"": "INT"},
+        },
+        "data_fields": [
+            {
+                "name": "version",
+                "field_type": "CharField",
+                "db_column": "version",
+                "python_type": "str",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"max_length": 255},
+                "db_field_types": {"": "VARCHAR(255)"},
+            },
+            {
+                "name": "app",
+                "field_type": "CharField",
+                "db_column": "app",
+                "python_type": "str",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {"max_length": 20},
+                "db_field_types": {"": "VARCHAR(20)"},
+            },
+            {
+                "name": "content",
+                "field_type": "JSONField",
+                "db_column": "content",
+                "python_type": "Union[dict, list]",
+                "generated": False,
+                "nullable": False,
+                "unique": False,
+                "indexed": False,
+                "default": None,
+                "description": None,
+                "docstring": None,
+                "constraints": {},
+                "db_field_types": {"": "TEXT", "postgres": "JSONB"},
+            },
+        ],
+        "fk_fields": [],
+        "backward_fk_fields": [],
+        "o2o_fields": [],
+        "backward_o2o_fields": [],
+        "m2m_fields": [],
+    },
+}


 def test_migrate(mocker: MockerFixture):
-    mocker.patch("click.prompt", return_value=True)
-    apps = Tortoise.apps
-    models = apps.get("models")
-    diff_models = apps.get("diff_models")
-    Migrate.diff_models(diff_models, models)
+    """
+    models.py diff with old_models.py
+    - change email pk: id -> email_id
+    - add field: Email.address
+    - add fk: Config.user
+    - drop fk: Email.user
+    - drop field: User.avatar
+    - add index: Email.email
+    - add many to many: Email.users
+    - remove unique: User.username
+    - change column: length User.password
+    - add unique_together: (name,type) of Product
+    - alter default: Config.status
+    - rename column: Product.image -> Product.pic
+    """
+    mocker.patch("click.prompt", side_effect=(True,))
+
+    models_describe = get_models_describe("models")
+    Migrate.app = "models"
    if isinstance(Migrate.ddl, SqliteDDL):
        with pytest.raises(NotSupportError):
-            Migrate.diff_models(models, diff_models, False)
+            Migrate.diff_models(old_models_describe, models_describe)
+            Migrate.diff_models(models_describe, old_models_describe, False)
    else:
-        Migrate.diff_models(models, diff_models, False)
+        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 Migrate.upgrade_operators == [
-            "ALTER TABLE `email` DROP FOREIGN KEY `fk_email_user_5b58673d`",
-            "ALTER TABLE `category` ADD `name` VARCHAR(200) NOT NULL",
-            "ALTER TABLE `user` ADD UNIQUE INDEX `uid_user_usernam_9987ab` (`username`)",
-            "ALTER TABLE `user` RENAME COLUMN `last_login_at` TO `last_login`",
-        ]
-        assert Migrate.downgrade_operators == [
-            "ALTER TABLE `category` DROP COLUMN `name`",
-            "ALTER TABLE `user` DROP INDEX `uid_user_usernam_9987ab`",
-            "ALTER TABLE `user` RENAME COLUMN `last_login` TO `last_login_at`",
-            "ALTER TABLE `email` ADD CONSTRAINT `fk_email_user_5b58673d` FOREIGN KEY "
-            "(`user_id`) REFERENCES `user` (`id`) ON DELETE CASCADE",
-        ]
+        assert sorted(Migrate.upgrade_operators) == sorted(
+            [
+                "ALTER TABLE `category` MODIFY COLUMN `name` VARCHAR(200)",
+                "ALTER TABLE `category` MODIFY COLUMN `slug` VARCHAR(100) NOT NULL",
+                "ALTER TABLE `config` ADD `user_id` INT NOT NULL  COMMENT 'User'",
+                "ALTER TABLE `config` ADD CONSTRAINT `fk_config_user_17daa970` FOREIGN KEY (`user_id`) REFERENCES `user` (`id`) ON DELETE CASCADE",
+                "ALTER TABLE `config` ALTER COLUMN `status` DROP DEFAULT",
+                "ALTER TABLE `email` ADD `address` VARCHAR(200) NOT NULL",
+                "ALTER TABLE `email` DROP COLUMN `user_id`",
+                "ALTER TABLE `configs` RENAME TO `config`",
+                "ALTER TABLE `product` RENAME COLUMN `image` TO `pic`",
+                "ALTER TABLE `email` RENAME COLUMN `id` TO `email_id`",
+                "ALTER TABLE `product` ADD INDEX `idx_product_name_869427` (`name`, `type_db_alias`)",
+                "ALTER TABLE `email` ADD INDEX `idx_email_email_4a1a33` (`email`)",
+                "ALTER TABLE `product` ADD UNIQUE INDEX `uid_product_name_869427` (`name`, `type_db_alias`)",
+                "ALTER TABLE `product` ALTER COLUMN `view_num` SET DEFAULT 0",
+                "ALTER TABLE `user` DROP COLUMN `avatar`",
+                "ALTER TABLE `user` MODIFY COLUMN `password` VARCHAR(100) NOT NULL",
+                "CREATE TABLE IF NOT EXISTS `newmodel` (\n    `id` INT NOT NULL PRIMARY KEY AUTO_INCREMENT,\n    `name` VARCHAR(50) NOT NULL\n) CHARACTER SET utf8mb4;",
+                "ALTER TABLE `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 `category` MODIFY COLUMN `name` VARCHAR(200) NOT NULL",
+                "ALTER TABLE `category` MODIFY COLUMN `slug` VARCHAR(200) NOT NULL",
+                "ALTER TABLE `config` DROP COLUMN `user_id`",
+                "ALTER TABLE `config` DROP FOREIGN KEY `fk_config_user_17daa970`",
+                "ALTER TABLE `config` ALTER COLUMN `status` SET DEFAULT 1",
+                "ALTER TABLE `email` ADD `user_id` INT NOT NULL",
+                "ALTER TABLE `email` DROP COLUMN `address`",
+                "ALTER TABLE `config` RENAME TO `configs`",
+                "ALTER TABLE `product` RENAME COLUMN `pic` TO `image`",
+                "ALTER TABLE `email` RENAME COLUMN `email_id` TO `id`",
+                "ALTER TABLE `product` DROP INDEX `idx_product_name_869427`",
+                "ALTER TABLE `email` DROP INDEX `idx_email_email_4a1a33`",
+                "ALTER TABLE `product` DROP INDEX `uid_product_name_869427`",
+                "ALTER TABLE `product` ALTER COLUMN `view_num` DROP DEFAULT",
+                "ALTER TABLE `user` ADD `avatar` VARCHAR(200) NOT NULL  DEFAULT ''",
+                "ALTER TABLE `user` DROP INDEX `idx_user_usernam_9987ab`",
+                "ALTER TABLE `user` MODIFY COLUMN `password` VARCHAR(200) NOT NULL",
+                "DROP TABLE IF EXISTS `email_user`",
+                "DROP TABLE IF EXISTS `newmodel`",
+            ]
+        )
+
    elif isinstance(Migrate.ddl, PostgresDDL):
-        assert Migrate.upgrade_operators == [
-            'ALTER TABLE "email" DROP CONSTRAINT "fk_email_user_5b58673d"',
-            'ALTER TABLE "category" ADD "name" VARCHAR(200) NOT NULL',
-            'ALTER TABLE "user" ADD CONSTRAINT "uid_user_usernam_9987ab" UNIQUE ("username")',
-            'ALTER TABLE "user" RENAME COLUMN "last_login_at" TO "last_login"',
-        ]
-        assert Migrate.downgrade_operators == [
-            'ALTER TABLE "category" DROP COLUMN "name"',
-            'ALTER TABLE "user" DROP CONSTRAINT "uid_user_usernam_9987ab"',
-            'ALTER TABLE "user" RENAME COLUMN "last_login" TO "last_login_at"',
-            'ALTER TABLE "email" ADD CONSTRAINT "fk_email_user_5b58673d" FOREIGN KEY ("user_id") REFERENCES "user" ("id") ON DELETE CASCADE',
-        ]
+        assert sorted(Migrate.upgrade_operators) == sorted(
+            [
+                'ALTER TABLE "category" ALTER COLUMN "name" DROP NOT NULL',
+                'ALTER TABLE "category" ALTER COLUMN "slug" TYPE VARCHAR(100) USING "slug"::VARCHAR(100)',
+                '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 "configs" RENAME TO "config"',
+                'ALTER TABLE "email" ADD "address" VARCHAR(200) NOT NULL',
+                'ALTER TABLE "email" DROP COLUMN "user_id"',
+                'ALTER TABLE "email" RENAME COLUMN "id" TO "email_id"',
+                'ALTER TABLE "product" ALTER COLUMN "view_num" SET DEFAULT 0',
+                'ALTER TABLE "product" RENAME COLUMN "image" TO "pic"',
+                'ALTER TABLE "user" ALTER COLUMN "password" TYPE VARCHAR(100) USING "password"::VARCHAR(100)',
+                'ALTER TABLE "user" DROP COLUMN "avatar"',
+                'CREATE INDEX "idx_product_name_869427" ON "product" ("name", "type_db_alias")',
+                'CREATE INDEX "idx_email_email_4a1a33" ON "email" ("email")',
+                'CREATE TABLE "email_user" ("email_id" INT NOT NULL REFERENCES "email" ("email_id") ON DELETE CASCADE,"user_id" INT NOT NULL REFERENCES "user" ("id") ON DELETE CASCADE)',
+                'CREATE TABLE IF NOT EXISTS "newmodel" (\n    "id" SERIAL NOT NULL PRIMARY KEY,\n    "name" VARCHAR(50) NOT NULL\n);\nCOMMENT ON COLUMN "config"."user_id" IS \'User\';',
+                'CREATE UNIQUE INDEX "uid_product_name_869427" ON "product" ("name", "type_db_alias")',
+                'CREATE UNIQUE INDEX "uid_user_usernam_9987ab" ON "user" ("username")',
+            ]
+        )
+        assert sorted(Migrate.downgrade_operators) == sorted(
+            [
+                'ALTER TABLE "category" ALTER COLUMN "name" SET NOT NULL',
+                'ALTER TABLE "category" ALTER COLUMN "slug" TYPE VARCHAR(200) USING "slug"::VARCHAR(200)',
+                'ALTER TABLE "config" ALTER COLUMN "status" SET DEFAULT 1',
+                'ALTER TABLE "config" DROP COLUMN "user_id"',
+                'ALTER TABLE "config" DROP CONSTRAINT "fk_config_user_17daa970"',
+                'ALTER TABLE "config" RENAME TO "configs"',
+                'ALTER TABLE "email" ADD "user_id" INT NOT NULL',
+                'ALTER TABLE "email" DROP COLUMN "address"',
+                'ALTER TABLE "email" RENAME COLUMN "email_id" TO "id"',
+                'ALTER TABLE "product" ALTER COLUMN "view_num" DROP DEFAULT',
+                'ALTER TABLE "product" RENAME COLUMN "pic" TO "image"',
+                'ALTER TABLE "user" ADD "avatar" VARCHAR(200) NOT NULL  DEFAULT \'\'',
+                'ALTER TABLE "user" ALTER COLUMN "password" TYPE VARCHAR(200) USING "password"::VARCHAR(200)',
+                'DROP INDEX "idx_product_name_869427"',
+                'DROP INDEX "idx_email_email_4a1a33"',
+                'DROP INDEX "idx_user_usernam_9987ab"',
+                'DROP INDEX "uid_product_name_869427"',
+                'DROP TABLE IF EXISTS "email_user"',
+                'DROP TABLE IF EXISTS "newmodel"',
+            ]
+        )
    elif isinstance(Migrate.ddl, SqliteDDL):
-        assert Migrate.upgrade_operators == [
-            'ALTER TABLE "email" DROP FOREIGN KEY "fk_email_user_5b58673d"',
-            'ALTER TABLE "category" ADD "name" VARCHAR(200) NOT NULL',
-            'ALTER TABLE "user" ADD UNIQUE INDEX "uid_user_usernam_9987ab" ("username")',
-            'ALTER TABLE "user" RENAME COLUMN "last_login_at" TO "last_login"',
-        ]
+        assert Migrate.upgrade_operators == []
+
        assert Migrate.downgrade_operators == []


@@ -62,18 +892,18 @@ def test_sort_all_version_files(mocker):
    mocker.patch(
        "os.listdir",
        return_value=[
-            "1_datetime_update.json",
-            "11_datetime_update.json",
-            "10_datetime_update.json",
-            "2_datetime_update.json",
+            "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.json",
-        "2_datetime_update.json",
-        "10_datetime_update.json",
-        "11_datetime_update.json",
+        "1_datetime_update.sql",
+        "2_datetime_update.sql",
+        "10_datetime_update.sql",
+        "11_datetime_update.sql",
    ]
Author	SHA1	Message	Date
long2ice	63e8d06157	remove aiomysql	2021-12-08 14:43:33 +08:00
long2ice	68ef8ac676	Fix ci	2021-12-08 14:38:16 +08:00
long2ice	8b5cf6faa0	`inspectdb` support `DATE`. (#215 )	2021-12-08 14:33:27 +08:00
long2ice	fac00d45cc	Remove `pydantic` dependency. (#198 )	2021-10-04 23:05:20 +08:00
long2ice	6f7893d376	Fix section name	2021-09-28 15:07:10 +08:00
long2ice	b1521c4cc7	update version	2021-09-27 19:55:38 +08:00
long2ice	24c1f4cb7d	Change default config file from `aerich.ini` to `pyproject.toml`. (#197 )	2021-09-27 11:05:20 +08:00
long2ice	661f241dac	Compatible with old version in indexes	2021-08-31 17:53:17 +08:00
long2ice	01787558d6	Fix test	2021-08-31 17:41:13 +08:00
long2ice	699b0321a4	Support `indexes` change. (#193 )	2021-08-31 17:36:25 +08:00
long2ice	4a83021892	Update FUNDING.yml	2021-08-26 20:39:31 +08:00
long2ice	af63221875	Fix no module found error. (#188 ) (#189 )	2021-08-16 11:14:43 +08:00
long2ice	359525716c	update README.md	2021-08-12 15:42:54 +08:00
long2ice	7d3eb2e151	Merge pull request #181 from Vovetta/dev Fix: migrate doesn't use source_field in unique_together	2021-08-04 09:42:18 +08:00
Vovetta	d8abf79449	Updated changelog and version	2021-08-03 10:38:31 -07:00
Vovetta	aa9f40ae27	Fix: migrate doesn't use source_field in unique_together	2021-08-03 10:36:06 -07:00
long2ice	79b7ae343a	update README.md	2021-08-03 16:25:06 +08:00
long2ice	6f5a9ab78c	Add `Command` class. (#148 ) (#141 ) (#123 ) (#106 )	2021-08-03 16:18:07 +08:00
long2ice	1e5a83c281	update deps	2021-07-26 17:44:18 +08:00
long2ice	180420843d	update README.md	2021-07-26 15:27:49 +08:00
long2ice	58f66b91cf	Fix redundant semicolons	2021-07-23 17:07:10 +08:00
long2ice	064d7ff675	Fix ci	2021-07-22 15:32:07 +08:00
long2ice	2da794d823	Fix `db_constraint` when fk changed. (#179 )	2021-07-22 14:37:49 +08:00
long2ice	77005f3793	Fix MySQL 5.X rename column.	2021-07-09 10:53:13 +08:00
long2ice	5a873b8b69	Merge pull request #177 from yusukefs/add-default-src-folder-config Add default value for src_folder config	2021-07-08 17:27:29 +08:00
Yusuke Sakai	3989b7c674	Update version and changelog	2021-07-08 18:01:59 +09:00
Yusuke Sakai	694b05356f	Add default src_folder cofig value	2021-07-08 17:35:44 +09:00
long2ice	919d56c936	add ci branches-ignore master	2021-07-07 10:29:38 +08:00
long2ice	7bcf9b2fed	Support `drop column` for sqlite. (#40 )	2021-07-03 13:51:01 +08:00
long2ice	9f663299cf	Merge pull request #174 from sasha00123/dev Fixed typo in README.md concerning dowgrade usage	2021-06-25 13:52:34 +08:00
Alexander Batyrgariev	28dbdf2663	Fixed typo in README.md concerning dowgrade usage	2021-06-25 08:00:00 +03:00
long2ice	e71a4b60a5	Merge pull request #166 from spacemanspiff2007/dev Added config option to specify source folder	2021-06-13 14:26:26 +08:00
-	62840136be	used old black version	2021-06-11 15:36:54 +02:00
-	185514f711	reformatted with black	2021-06-11 15:18:06 +02:00
-	8e783e031e	updated readme	2021-06-10 16:56:30 +02:00
-	10b7272ca8	Added an configuration option to specify the path of the source folder. This will make aerich work with various folder structures (e.g. ./src/MyPythonModule) Additionally this will try to import in init and show the user the error message on failure.	2021-06-10 16:52:03 +02:00
long2ice	0c763c6024	Fix repeat	2021-06-09 13:56:25 +08:00
long2ice	c6371a5c16	Fix repeat	2021-06-09 11:43:32 +08:00
long2ice	1dbf9185b6	Not catch exception when import config. (#164 )	2021-06-04 17:47:39 +08:00
long2ice	9bf2de0b9a	Fix incorrect index creation order. (#151 )	2021-06-01 17:09:45 +08:00
long2ice	bf1cf21324	Merge pull request #158 from manzato/pyproject-update Update URLs	2021-05-22 22:43:52 +08:00
Guillermo Manzato	8b08329493	Update URLs	2021-05-22 11:39:49 -03:00
long2ice	5bc7d23d95	Merge pull request #157 from tortoise/dependabot/pip/pydantic-1.8.2 Bump pydantic from 1.8.1 to 1.8.2	2021-05-14 09:30:47 +08:00
dependabot[bot]	a253aa96cb	Bump pydantic from 1.8.1 to 1.8.2 Bumps [pydantic](https://github.com/samuelcolvin/pydantic) from 1.8.1 to 1.8.2. - [Release notes](https://github.com/samuelcolvin/pydantic/releases) - [Changelog](https://github.com/samuelcolvin/pydantic/blob/master/HISTORY.md) - [Commits](https://github.com/samuelcolvin/pydantic/compare/v1.8.1...v1.8.2) Signed-off-by: dependabot[bot] <support@github.com>	2021-05-13 20:51:51 +00:00
long2ice	15a6e874dd	update deps	2021-05-03 14:23:27 +08:00
long2ice	19a5dcbf3f	update deps	2021-04-26 21:01:40 +08:00
long2ice	922e3eef16	Fix CI	2021-04-05 17:11:28 +08:00
long2ice	44fd2fe6ae	Fix default function when migrate. (#147 )	2021-04-05 14:10:42 +08:00
long2ice	b147859960	Fix default function when migrate	2021-04-04 05:46:34 +00:00
long2ice	793cf2532c	Create FUNDING.yml	2021-04-03 21:34:24 +08:00
long2ice	fa85e05d1d	Fix postgre alter null. (#142 )	2021-03-28 16:22:49 +08:00
long2ice	3f52ac348b	Support `rename table`. (#139 )	2021-03-25 21:21:49 +08:00
long2ice	f8aa7a8f34	Fix inspectdb for `FloatField`. (#138 )	2021-03-22 14:16:59 +08:00
long2ice	44d520cc82	Fix postgres field type change error. (#135 )	2021-03-21 21:18:08 +08:00
long2ice	364735f804	Fix rename field on the field add. (#134 )	2021-03-21 20:43:05 +08:00
long2ice	505d361597	Fix drop model in the downgrade. (#132 )	2021-03-18 23:40:13 +08:00
long2ice	a19edd3a35	update ci name	2021-03-13 16:45:35 +08:00
long2ice	84d1f78019	update workflow name and add cryptography	2021-03-13 16:43:22 +08:00
long2ice	8fb07a6c9e	update deps	2021-03-13 16:40:27 +08:00
long2ice	54da8b22af	update aiomysql to asyncmy	2021-03-13 16:37:45 +08:00
long2ice	4c0308ff22	update test.yml	2021-03-03 22:03:38 +08:00
long2ice	38c4a15661	update test.yml	2021-03-03 20:42:18 +08:00
long2ice	52151270e0	Fix bug for field change. (#119 )	2021-03-03 20:36:54 +08:00
long2ice	49897dc4fd	Merge pull request #121 from AulonSal/close-tortoise-connections Close Tortoise connections properly	2021-02-28 14:47:58 +08:00
AulonSal	d4ad0e270f	Update version and changelog	2021-02-28 12:13:59 +05:30
AulonSal	e74fc304a5	Don't close db connections when group function \(cli\) is run	2021-02-27 00:43:55 +05:30
AulonSal	14d20455e6	Replace coro logic with tortoise.run_async	2021-02-23 13:06:40 +05:30
long2ice	bd9ecfd6e1	Merge pull request #122 from personalcomputer/personalcomputer/improve_readme_english Improve English grammar / clarity in README.md	2021-02-22 12:31:15 +08:00
John Miller	de8500b9a1	Improve English grammar / clarity in README.md	2021-02-21 19:46:04 -08:00
AulonSal	90b47c5af7	Close connections even if command raises exception	2021-02-22 07:40:18 +05:30
AulonSal	02fe5a9d31	Close Tortoise connections properly	2021-02-20 13:11:29 +05:30
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