Dependency Note

For Peewee<3.0 please use Peewee-Migrate==0.14.0.

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
    --schema                TEXT  Database schema
    -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
    --schema                TEXT  Database schema
    -v, --verbose
    --help                        Show this message and exit.

Auto create migration:

$ pw_migrate makemigrations --help

Usage: pw_migrate makemigrations [OPTIONS]

  Create a migration automatically

  Similar to `create` command, but `auto` is True by default, and `name` not
  required

Options:
    --name TEXT         Migration file name. By default will be
                      'auto_YYYYmmdd_HHMM'
    --auto              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
    --schema                TEXT  Database schema
    -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