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Provides a decorator to operate on multiple schemas at once using alembic

Project description


This module provides the ability to act on multiple postgres schemas at once when using alembic.



Used to decorate the upgrade() and downgrade() functions in a migration. When upgrade or downgrade are decorated with perSchema() the decorated function will be called for a list of schemas in the current database.


  • schemas A list of schema names to run the function against. If omitted perSchema() will automatically generate a list of non-system schemas from the current database by using getAllNonSystemSchemas()


Returns a list of all schemas in the current database.


Returns a list of schemas in the current database, omitting information_schema and pg_catalog.

Example Usage:


Revision ID: a6a219646b55
Create Date: 2019-10-16 14:43:11.347575

from alembic import op
import sqlalchemy as sa
from sqlalchemy.sql import text
from almebic_multischema import perSchema

# revision identifiers, used by Alembic.
revision = 'a6a219646b55'
down_revision = None
branch_labels = None
depends_on = None

@perSchema(schemas=["public", "foo", "bar"])
def upgrade():
    users = text(
      """CREATE TABLE users
            id serial PRIMARY KEY,
            firstname VARCHAR (50) UNIQUE,
            lastname VARCHAR (50)

@perSchema(schemas=["public", "foo", "bar"])
def downgrade():
    op.execute(text("DROP TABLE users"))

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