Peewee Migrate

Peewee Migrate -- A simple migration engine for Peewee ORM

Contents

• Requirements
  • Dependency Note
• Installation
• Usage
  • From shell
  • From python
  • Migration files
• Bug tracker
• Contributing

Requirements

• peewee >= 3.8

Dependency Note

• For Peewee<3.0 please use Peewee-Migrate==0.14.0
• For Python 3.0-3.6 please use Peewee-Migrate==1.1.6
• For Python 3.7 please use Peewee-Migrate==1.6.6
• For Python 3.8+ please use Peewee-Migrate>=1.12.1

Installation

Peewee Migrate should be installed using pip:

pip install peewee-migrate

Usage

Do you want Flask integration? Look at Flask-PW.

From shell

Getting help:

$ pw_migrate --help

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

Options:
    --help  Show this message and exit.

Commands:
    create   Create migration.
    migrate  Run migrations.
    rollback Rollback migration.

Create migration:

$ pw_migrate create --help

Usage: pw_migrate create [OPTIONS] NAME

    Create migration.

Options:
    --auto                  FLAG  Scan sources and create db migrations automatically. Supports autodiscovery.
    --auto-source           TEXT  Set to python module path for changes autoscan (e.g. 'package.models'). Current directory will be recursively scanned by default.
    --database              TEXT  Database connection
    --directory             TEXT  Directory where migrations are stored
    -v, --verbose
    --help                        Show this message and exit.

Run migrations:

$ pw_migrate migrate --help

Usage: pw_migrate migrate [OPTIONS]

    Run migrations.

Options:
    --name TEXT       Select migration
    --database TEXT   Database connection
    --directory TEXT  Directory where migrations are stored
    -v, --verbose
    --help            Show this message and exit.

Rollback migrations:

$ pw_migrate rollback --help

Usage: pw_migrate rollback [OPTIONS]

    Rollback a migration with given steps --count of last migrations as integer number

Options:
    --count INTEGER   Number of last migrations to be rolled back.Ignored in
                        case of non-empty name

    --database TEXT   Database connection
    --directory TEXT  Directory where migrations are stored
    -v, --verbose
    --help            Show this message and exit.

From python

from peewee_migrate import Router
from peewee import SqliteDatabase

router = Router(SqliteDatabase('test.db'))

# Create migration
router.create('migration_name')

# Run migration/migrations
router.run('migration_name')

# Run all unapplied migrations
router.run()

Migration files

By default, migration files are looked up in os.getcwd()/migrations directory, but custom directory can be given.

Migration files are sorted and applied in ascending order per their filename.

Each migration file must specify migrate() function and may specify rollback() function

def migrate(migrator, database, fake=False, **kwargs):
    pass

def rollback(migrator, database, fake=False, **kwargs):
    pass

Bug tracker

If you have any suggestions, bug reports or annoyances please report them to the issue tracker at https://github.com/klen/peewee_migrate/issues

Contributing

Development of starter happens at github: https://github.com/klen/peewee_migrate