Tindakan perpindahan basisdata¶

Membuat tambahan menggunakan perpindahan¶

Anda dapat membuat tambahan PostgreSQL dalam basisdata anda menggunakan berkas pemindahan. Contoh ini membuat sebuah tambahan hstore, tetapi prinsip-prinsip sama berlaku untuk tambahan-tambahan lain.

Setel tambahan hstore dalam PostgreSQL sebelum tindakan pertama CreateModel atau AddField yang melibatkan HStoreField dengan menambahkan perpindahan dengan tindakan HStoreExtension. Sebagai contoh:

from django.contrib.postgres.operations import HStoreExtension

class Migration(migrations.Migration):
    ...

    operations = [
        HStoreExtension(),
        ...
    ]

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

CreateExtension¶

class CreateExtension(name)¶

An Operation subclass which installs a PostgreSQL extension. For common extensions, use one of the more specific subclasses below.

name¶

Ini adalah argumen wajib. Nama dari tambahan untuk dipasang.

BloomExtension¶

class BloomExtension¶

New in Django 3.1.

Installs the bloom extension.

BtreeGinExtension¶

class BtreeGinExtension¶

Installs the btree_gin extension.

BtreeGistExtension¶

class BtreeGistExtension¶

Installs the btree_gist extension.

CITextExtension¶

class CITextExtension¶

Pasang tambahan citext.

CryptoExtension¶

class CryptoExtension¶

Pasang tambahan pgcrypto.

HStoreExtension¶

class HStoreExtension¶

Pasang tambahan hstore dan juga setel hubungan pada penterjemah data hstore untuk kemungkinan penggunaan dalam perpindahaan selanjutnya.

TrigramExtension¶

class TrigramExtension¶

Pasang tambahan pg_trm.

UnaccentExtension¶

class UnaccentExtension¶

Pasang tambahan unaccent.

Concurrent index operations¶

PostgreSQL supports the CONCURRENTLY option to CREATE INDEX and DROP INDEX statements to add and remove indexes without locking out writes. This option is useful for adding or removing an index in a live production database.

class AddIndexConcurrently(model_name, index)¶

Like AddIndex, but creates an index with the CONCURRENTLY option. This has a few caveats to be aware of when using this option, see the PostgreSQL documentation of building indexes concurrently.

class RemoveIndexConcurrently(model_name, name)¶

Like RemoveIndex, but removes the index with the CONCURRENTLY option. This has a few caveats to be aware of when using this option, see the PostgreSQL documentation.