# Aerich
[](https://pypi.python.org/pypi/aerich)
[](https://github.com/tortoise/aerich)
[](https://github.com/tortoise/aerich/actions?query=workflow:pypi)
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English | [Русский](./README_RU.md)
## Introduction
Aerich is a database migrations tool for TortoiseORM, which is like alembic for SQLAlchemy, or like Django ORM with
it\'s own migration solution.
## Install
Just install from pypi:
```shell
pip install aerich
```
## Quick Start
```shell
> aerich -h
Usage: aerich [OPTIONS] COMMAND [ARGS]...
Options:
-V, --version Show the version and exit.
-c, --config TEXT Config file. [default: pyproject.toml]
--app TEXT Tortoise-ORM app name.
-h, --help Show this message and exit.
Commands:
downgrade Downgrade to specified version.
heads Show current available heads in migrate location.
history List all migrate items.
init Init config file and generate root migrate location.
init-db Generate schema and generate app migrate location.
inspectdb Introspects the database tables to standard output as...
migrate Generate migrate changes file.
upgrade Upgrade to specified version.
```
## Usage
You need to add `aerich.models` to your `Tortoise-ORM` config first. Example:
```python
TORTOISE_ORM = {
"connections": {"default": "mysql://root:123456@127.0.0.1:3306/test"},
"apps": {
"models": {
"models": ["tests.models", "aerich.models"],
"default_connection": "default",
},
},
}
```
### Initialization
```shell
> aerich init -h
Usage: aerich init [OPTIONS]
Init config file and generate root migrate location.
Options:
-t, --tortoise-orm TEXT Tortoise-ORM config module dict variable, like
settings.TORTOISE_ORM. [required]
--location TEXT Migrate store location. [default: ./migrations]
-s, --src_folder TEXT Folder of the source, relative to the project root.
-h, --help Show this message and exit.
```
Initialize the config file and migrations location:
```shell
> aerich init -t tests.backends.mysql.TORTOISE_ORM
Success create migrate location ./migrations
Success write config to pyproject.toml
```
### Init db
```shell
> aerich init-db
Success create app migrate location ./migrations/models
Success generate schema for app "models"
```
If your Tortoise-ORM app is not the default `models`, you must specify the correct app via `--app`,
e.g. `aerich --app other_models init-db`.
### Update models and make migrate
```shell
> aerich migrate --name drop_column
Success migrate 1_202029051520102929_drop_column.py
```
Format of migrate filename is
`{version_num}_{datetime}_{name|update}.py`.
If `aerich` guesses you are renaming a column, it will ask `Rename {old_column} to {new_column} [True]`. You can choose
`True` to rename column without column drop, or choose `False` to drop the column then create. Note that the latter may
lose data.
If you need to manually write migration, you could generate empty file:
```shell
> aerich migrate --name add_index --empty
Success migrate 1_202326122220101229_add_index.py
```
### Upgrade to latest version
```shell
> aerich upgrade
Success upgrade 1_202029051520102929_drop_column.py
```
Now your db is migrated to latest.
### Downgrade to specified version
```shell
> aerich downgrade -h
Usage: aerich downgrade [OPTIONS]
Downgrade to specified version.
Options:
-v, --version INTEGER Specified version, default to last. [default: -1]
-d, --delete Delete version files at the same time. [default:
False]
--yes Confirm the action without prompting.
-h, --help Show this message and exit.
```
```shell
> aerich downgrade
Success downgrade 1_202029051520102929_drop_column.py
```
Now your db is rolled back to the specified version.
### Show history
```shell
> aerich history
1_202029051520102929_drop_column.py
```
### Show heads to be migrated
```shell
> aerich heads
1_202029051520102929_drop_column.py
```
### Inspect db tables to TortoiseORM model
Currently `inspectdb` support MySQL & Postgres & SQLite.
```shell
Usage: aerich inspectdb [OPTIONS]
Introspects the database tables to standard output as TortoiseORM model.
Options:
-t, --table TEXT Which tables to inspect.
-h, --help Show this message and exit.
```
Inspect all tables and print to console:
```shell
aerich --app models inspectdb
```
Inspect a specified table in the default app and redirect to `models.py`:
```shell
aerich inspectdb -t user > models.py
```
For example, you table is:
```sql
CREATE TABLE `test`
(
`id` int NOT NULL AUTO_INCREMENT,
`decimal` decimal(10, 2) NOT NULL,
`date` date DEFAULT NULL,
`datetime` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
`time` time DEFAULT NULL,
`float` float DEFAULT NULL,
`string` varchar(200) COLLATE utf8mb4_general_ci DEFAULT NULL,
`tinyint` tinyint DEFAULT NULL,
PRIMARY KEY (`id`),
KEY `asyncmy_string_index` (`string`)
) ENGINE = InnoDB
DEFAULT CHARSET = utf8mb4
COLLATE = utf8mb4_general_ci
```
Now run `aerich inspectdb -t test` to see the generated model:
```python
from tortoise import Model, fields
class Test(Model):
date = fields.DateField(null=True, )
datetime = fields.DatetimeField(auto_now=True, )
decimal = fields.DecimalField(max_digits=10, decimal_places=2, )
float = fields.FloatField(null=True, )
id = fields.IntField(pk=True, )
string = fields.CharField(max_length=200, null=True, )
time = fields.TimeField(null=True, )
tinyint = fields.BooleanField(null=True, )
```
Note that this command is limited and can't infer some fields, such as `IntEnumField`, `ForeignKeyField`, and others.
### Multiple databases
```python
tortoise_orm = {
"connections": {
"default": expand_db_url(db_url, True),
"second": expand_db_url(db_url_second, True),
},
"apps": {
"models": {"models": ["tests.models", "aerich.models"], "default_connection": "default"},
"models_second": {"models": ["tests.models_second"], "default_connection": "second", },
},
}
```
You only need to specify `aerich.models` in one app, and must specify `--app` when running `aerich migrate` and so on.
## Restore `aerich` workflow
In some cases, such as broken changes from upgrade of `aerich`, you can't run `aerich migrate` or `aerich upgrade`, you
can make the following steps:
1. drop `aerich` table.
2. delete `migrations/{app}` directory.
3. rerun `aerich init-db`.
Note that these actions is safe, also you can do that to reset your migrations if your migration files is too many.
## Use `aerich` in application
You can use `aerich` out of cli by use `Command` class.
```python
from aerich import Command
command = Command(tortoise_config=config, app='models')
await command.init()
await command.migrate('test')
```
## License
This project is licensed under the
[Apache-2.0](https://github.com/long2ice/aerich/blob/master/LICENSE) License.
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"description": "# Aerich\n\n[](https://pypi.python.org/pypi/aerich)\n[](https://github.com/tortoise/aerich)\n[](https://github.com/tortoise/aerich/actions?query=workflow:pypi)\n[](https://github.com/tortoise/aerich/actions?query=workflow:ci)\n\nEnglish | [\u0420\u0443\u0441\u0441\u043a\u0438\u0439](./README_RU.md)\n\n## Introduction\n\nAerich is a database migrations tool for TortoiseORM, which is like alembic for SQLAlchemy, or like Django ORM with\nit\\'s own migration solution.\n\n## Install\n\nJust install from pypi:\n\n```shell\npip install aerich\n```\n\n## Quick Start\n\n```shell\n> aerich -h\n\nUsage: aerich [OPTIONS] COMMAND [ARGS]...\n\nOptions:\n -V, --version Show the version and exit.\n -c, --config TEXT Config file. [default: pyproject.toml]\n --app TEXT Tortoise-ORM app name.\n -h, --help Show this message and exit.\n\nCommands:\n downgrade Downgrade to specified version.\n heads Show current available heads in migrate location.\n history List all migrate items.\n init Init config file and generate root migrate location.\n init-db Generate schema and generate app migrate location.\n inspectdb Introspects the database tables to standard output as...\n migrate Generate migrate changes file.\n upgrade Upgrade to specified version.\n```\n\n## Usage\n\nYou need to add `aerich.models` to your `Tortoise-ORM` config first. Example:\n\n```python\nTORTOISE_ORM = {\n \"connections\": {\"default\": \"mysql://root:123456@127.0.0.1:3306/test\"},\n \"apps\": {\n \"models\": {\n \"models\": [\"tests.models\", \"aerich.models\"],\n \"default_connection\": \"default\",\n },\n },\n}\n```\n\n### Initialization\n\n```shell\n> aerich init -h\n\nUsage: aerich init [OPTIONS]\n\n Init config file and generate root migrate location.\n\nOptions:\n -t, --tortoise-orm TEXT Tortoise-ORM config module dict variable, like\n settings.TORTOISE_ORM. [required]\n --location TEXT Migrate store location. [default: ./migrations]\n -s, --src_folder TEXT Folder of the source, relative to the project root.\n -h, --help Show this message and exit.\n```\n\nInitialize the config file and migrations location:\n\n```shell\n> aerich init -t tests.backends.mysql.TORTOISE_ORM\n\nSuccess create migrate location ./migrations\nSuccess write config to pyproject.toml\n```\n\n### Init db\n\n```shell\n> aerich init-db\n\nSuccess create app migrate location ./migrations/models\nSuccess generate schema for app \"models\"\n```\n\nIf your Tortoise-ORM app is not the default `models`, you must specify the correct app via `--app`,\ne.g. `aerich --app other_models init-db`.\n\n### Update models and make migrate\n\n```shell\n> aerich migrate --name drop_column\n\nSuccess migrate 1_202029051520102929_drop_column.py\n```\n\nFormat of migrate filename is\n`{version_num}_{datetime}_{name|update}.py`.\n\nIf `aerich` guesses you are renaming a column, it will ask `Rename {old_column} to {new_column} [True]`. You can choose\n`True` to rename column without column drop, or choose `False` to drop the column then create. Note that the latter may\nlose data.\n\nIf you need to manually write migration, you could generate empty file:\n\n```shell\n> aerich migrate --name add_index --empty\n\nSuccess migrate 1_202326122220101229_add_index.py\n```\n\n### Upgrade to latest version\n\n```shell\n> aerich upgrade\n\nSuccess upgrade 1_202029051520102929_drop_column.py\n```\n\nNow your db is migrated to latest.\n\n### Downgrade to specified version\n\n```shell\n> aerich downgrade -h\n\nUsage: aerich downgrade [OPTIONS]\n\n Downgrade to specified version.\n\nOptions:\n -v, --version INTEGER Specified version, default to last. [default: -1]\n -d, --delete Delete version files at the same time. [default:\n False]\n\n --yes Confirm the action without prompting.\n -h, --help Show this message and exit.\n```\n\n```shell\n> aerich downgrade\n\nSuccess downgrade 1_202029051520102929_drop_column.py\n```\n\nNow your db is rolled back to the specified version.\n\n### Show history\n\n```shell\n> aerich history\n\n1_202029051520102929_drop_column.py\n```\n\n### Show heads to be migrated\n\n```shell\n> aerich heads\n\n1_202029051520102929_drop_column.py\n```\n\n### Inspect db tables to TortoiseORM model\n\nCurrently `inspectdb` support MySQL & Postgres & SQLite.\n\n```shell\nUsage: aerich inspectdb [OPTIONS]\n\n Introspects the database tables to standard output as TortoiseORM model.\n\nOptions:\n -t, --table TEXT Which tables to inspect.\n -h, --help Show this message and exit.\n```\n\nInspect all tables and print to console:\n\n```shell\naerich --app models inspectdb\n```\n\nInspect a specified table in the default app and redirect to `models.py`:\n\n```shell\naerich inspectdb -t user > models.py\n```\n\nFor example, you table is:\n\n```sql\nCREATE TABLE `test`\n(\n `id` int NOT NULL AUTO_INCREMENT,\n `decimal` decimal(10, 2) NOT NULL,\n `date` date DEFAULT NULL,\n `datetime` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,\n `time` time DEFAULT NULL,\n `float` float DEFAULT NULL,\n `string` varchar(200) COLLATE utf8mb4_general_ci DEFAULT NULL,\n `tinyint` tinyint DEFAULT NULL,\n PRIMARY KEY (`id`),\n KEY `asyncmy_string_index` (`string`)\n) ENGINE = InnoDB\n DEFAULT CHARSET = utf8mb4\n COLLATE = utf8mb4_general_ci\n```\n\nNow run `aerich inspectdb -t test` to see the generated model:\n\n```python\nfrom tortoise import Model, fields\n\n\nclass Test(Model):\n date = fields.DateField(null=True, )\n datetime = fields.DatetimeField(auto_now=True, )\n decimal = fields.DecimalField(max_digits=10, decimal_places=2, )\n float = fields.FloatField(null=True, )\n id = fields.IntField(pk=True, )\n string = fields.CharField(max_length=200, null=True, )\n time = fields.TimeField(null=True, )\n tinyint = fields.BooleanField(null=True, )\n```\n\nNote that this command is limited and can't infer some fields, such as `IntEnumField`, `ForeignKeyField`, and others.\n\n### Multiple databases\n\n```python\ntortoise_orm = {\n \"connections\": {\n \"default\": expand_db_url(db_url, True),\n \"second\": expand_db_url(db_url_second, True),\n },\n \"apps\": {\n \"models\": {\"models\": [\"tests.models\", \"aerich.models\"], \"default_connection\": \"default\"},\n \"models_second\": {\"models\": [\"tests.models_second\"], \"default_connection\": \"second\", },\n },\n}\n```\n\nYou only need to specify `aerich.models` in one app, and must specify `--app` when running `aerich migrate` and so on.\n\n## Restore `aerich` workflow\n\nIn some cases, such as broken changes from upgrade of `aerich`, you can't run `aerich migrate` or `aerich upgrade`, you\ncan make the following steps:\n\n1. drop `aerich` table.\n2. delete `migrations/{app}` directory.\n3. rerun `aerich init-db`.\n\nNote that these actions is safe, also you can do that to reset your migrations if your migration files is too many.\n\n## Use `aerich` in application\n\nYou can use `aerich` out of cli by use `Command` class.\n\n```python\nfrom aerich import Command\n\ncommand = Command(tortoise_config=config, app='models')\nawait command.init()\nawait command.migrate('test')\n```\n\n## License\n\nThis project is licensed under the\n[Apache-2.0](https://github.com/long2ice/aerich/blob/master/LICENSE) License.\n\n",
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