Database migration operations

Database migration operations

All of these operations are available from the django.contrib.postgres.operations module.

Creating extension using migrations

You can create a PostgreSQL extension in your database using a migration file. This example creates an hstore extension, but the same principles apply for other extensions.

Set up the hstore extension in PostgreSQL before the first CreateModel or AddField operation that involves HStoreField by adding a migration with the HStoreExtension operation. For example:

from django.contrib.postgres.operations import HStoreExtension

class Migration(migrations.Migration):
    ...

    operations = [
        HStoreExtension(),
        ...
    ]

Creating the extension requires a database user with superuser privileges. If the Django database user doesn’t have superuser privileges, you’ll have to create the extension outside of Django migrations with a user that has the appropriate privileges. In that case, connect to your Django database and run the query CREATE EXTENSION IF NOT EXISTS hstore;.

CreateExtension

class CreateExtension(name) [source]

An Operation subclass which installs PostgreSQL extensions.

name

This is a required argument. The name of the extension to be installed.

HStoreExtension

class HStoreExtension [source]

Installs the hstore extension and also sets up the connection to interpret hstore data for possible use in subsequent migrations.

TrigramExtension

class TrigramExtension [source]

New in Django 1.10.

Installs the pg_trgm extension.

UnaccentExtension

class UnaccentExtension [source]

Installs the unaccent extension.