226 lines
6.2 KiB
Markdown
226 lines
6.2 KiB
Markdown
# Aerich
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[](https://pypi.python.org/pypi/aerich)
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[](https://github.com/long2ice/aerich)
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[](https://github.com/long2ice/aerich/actions?query=workflow:pypi)
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[](https://github.com/long2ice/aerich/actions?query=workflow:test)
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## Introduction
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Aerich is a database migrations tool for Tortoise-ORM, which like alembic for SQLAlchemy, or Django ORM with it\'s own
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migrations solution.
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~~**Important: You can only use absolutely import in your `models.py` to make `aerich` work.**~~
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From version `v0.5.0`, there is no such limitation now.
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## Install
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Just install from pypi:
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```shell
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> pip install aerich
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```
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## Quick Start
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```shell
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> aerich -h
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Usage: aerich [OPTIONS] COMMAND [ARGS]...
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Options:
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-c, --config TEXT Config file. [default: aerich.ini]
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--app TEXT Tortoise-ORM app name. [default: models]
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-n, --name TEXT Name of section in .ini file to use for aerich config.
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[default: aerich]
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-h, --help Show this message and exit.
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Commands:
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downgrade Downgrade to specified version.
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heads Show current available heads in migrate location.
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history List all migrate items.
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init Init config file and generate root migrate location.
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init-db Generate schema and generate app migrate location.
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inspectdb Introspects the database tables to standard output as...
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migrate Generate migrate changes file.
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upgrade Upgrade to latest version.
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```
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## Usage
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You need add `aerich.models` to your `Tortoise-ORM` config first, example:
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```python
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TORTOISE_ORM = {
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"connections": {"default": "mysql://root:123456@127.0.0.1:3306/test"},
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"apps": {
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"models": {
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"models": ["tests.models", "aerich.models"],
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"default_connection": "default",
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},
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},
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}
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```
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### Initialization
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```shell
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> aerich init -h
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Usage: aerich init [OPTIONS]
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Init config file and generate root migrate location.
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Options:
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-t, --tortoise-orm TEXT Tortoise-ORM config module dict variable, like settings.TORTOISE_ORM.
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[required]
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--location TEXT Migrate store location. [default: ./migrations]
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-h, --help Show this message and exit.
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```
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Init config file and location:
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```shell
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> aerich init -t tests.backends.mysql.TORTOISE_ORM
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Success create migrate location ./migrations
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Success generate config file aerich.ini
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```
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### Init db
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```shell
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> aerich init-db
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Success create app migrate location ./migrations/models
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Success generate schema for app "models"
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```
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If your Tortoise-ORM app is not default `models`, you must specify
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`--app` like `aerich --app other_models init-db`.
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### Update models and make migrate
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```shell
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> aerich migrate --name drop_column
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Success migrate 1_202029051520102929_drop_column.sql
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```
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Format of migrate filename is
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`{version_num}_{datetime}_{name|update}.sql`.
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And if `aerich` guess you are renaming a column, it will ask `Rename {old_column} to {new_column} [True]`, you can
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choice `True` to rename column without column drop, or choice `False` to drop column then create, note that the after
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maybe lose data.
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### Upgrade to latest version
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```shell
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> aerich upgrade
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Success upgrade 1_202029051520102929_drop_column.sql
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```
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Now your db is migrated to latest.
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### Downgrade to specified version
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```shell
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> aerich init -h
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Usage: aerich downgrade [OPTIONS]
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Downgrade to specified version.
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Options:
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-v, --version INTEGER Specified version, default to last. [default: -1]
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-d, --delete Delete version files at the same time. [default:
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False]
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--yes Confirm the action without prompting.
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-h, --help Show this message and exit.
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```
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```shell
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> aerich downgrade
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Success downgrade 1_202029051520102929_drop_column.sql
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```
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Now your db rollback to specified version.
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### Show history
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```shell
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> aerich history
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1_202029051520102929_drop_column.sql
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```
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### Show heads to be migrated
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```shell
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> aerich heads
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1_202029051520102929_drop_column.sql
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```
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### Inspect db tables to TortoiseORM model
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Currently, only support MySQL.
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```shell
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Usage: aerich inspectdb [OPTIONS]
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Introspects the database tables to standard output as TortoiseORM model.
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Options:
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-t, --table TEXT Which tables to inspect.
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-h, --help Show this message and exit.
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```
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Inspect all tables and print to console:
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```shell
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aerich --app models inspectdb
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```
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Inspect a specified table in default app and redirect to `models.py`:
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```shell
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aerich inspectdb -t user > models.py
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```
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Note that this command is restricted, which is not supported in some solutions, such as `IntEnumField`
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and `ForeignKeyField` and so on.
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### Multiple databases
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```python
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tortoise_orm = {
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"connections": {
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"default": expand_db_url(db_url, True),
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"second": expand_db_url(db_url_second, True),
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},
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"apps": {
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"models": {"models": ["tests.models", "aerich.models"], "default_connection": "default"},
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"models_second": {"models": ["tests.models_second"], "default_connection": "second", },
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},
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}
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```
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You need only specify `aerich.models` in one app, and must specify `--app` when run `aerich migrate` and so on.
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## Support this project
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| AliPay | WeChatPay | PayPal |
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| -------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------- | ---------------------------------------------------------------- |
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| <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. |
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## License
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This project is licensed under the
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[Apache-2.0](https://github.com/long2ice/aerich/blob/master/LICENSE) License.
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