{"title":"Tindakan perpindahan basisdata","version":"4.2","locale":"id","docname":"ref/contrib/postgres/operations","url":"/id/4.2/ref/contrib/postgres/operations/","canonical":"https://djangodocs.dev/id/4.2/ref/contrib/postgres/operations/","summary":"Semua operations ini tersedia dari modul django.contrib.postgres.operations . Membuat tambahan menggunakan perpindahan Link to this heading # Anda dapat membuat…","html":"

Tindakan perpindahan basisdataLink to this heading#

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Semua operations ini tersedia dari modul django.contrib.postgres.operations.

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Membuat tambahan menggunakan perpindahanLink to this heading#

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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.

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

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from django.contrib.postgres.operations import HStoreExtension\n\n\nclass Migration(migrations.Migration):\n    ...\n\n    operations = [HStoreExtension(), ...]\n
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The operation skips adding the extension if it already exists.

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

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CreateExtensionLink to this heading#

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\nclass CreateExtension(name)Link to this definition#
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An Operation subclass which installs a PostgreSQL extension. For common\nextensions, use one of the more specific subclasses below.

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\nnameLink to this definition#
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Ini adalah argumen wajib. Nama dari tambahan untuk dipasang.

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BloomExtensionLink to this heading#

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\nclass BloomExtensionLink to this definition#
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Installs the bloom extension.

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BtreeGinExtensionLink to this heading#

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\nclass BtreeGinExtensionLink to this definition#
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Installs the btree_gin extension.

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BtreeGistExtensionLink to this heading#

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\nclass BtreeGistExtensionLink to this definition#
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Installs the btree_gist extension.

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CITextExtensionLink to this heading#

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\nclass CITextExtensionLink to this definition#
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Pasang tambahan citext.

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CryptoExtensionLink to this heading#

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\nclass CryptoExtensionLink to this definition#
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Pasang tambahan pgcrypto.

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HStoreExtensionLink to this heading#

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\nclass HStoreExtensionLink to this definition#
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Pasang tambahan hstore dan juga setel hubungan pada penterjemah data hstore untuk kemungkinan penggunaan dalam perpindahaan selanjutnya.

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TrigramExtensionLink to this heading#

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\nclass TrigramExtensionLink to this definition#
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Pasang tambahan pg_trm.

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UnaccentExtensionLink to this heading#

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\nclass UnaccentExtensionLink to this definition#
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Pasang tambahan unaccent.

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Managing collations using migrationsLink to this heading#

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If you need to filter or order a column using a particular collation that your\noperating system provides but PostgreSQL does not, you can manage collations in\nyour database using a migration file. These collations can then be used with\nthe db_collation parameter on CharField,\nTextField, and their subclasses.

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For example, to create a collation for German phone book ordering:

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Code
from django.contrib.postgres.operations import CreateCollation\n\n\nclass Migration(migrations.Migration):\n    ...\n\n    operations = [\n        CreateCollation(\n            "case_insensitive",\n            provider="icu",\n            locale="und-u-ks-level2",\n            deterministic=False,\n        ),\n        ...,\n    ]\n
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\nclass CreateCollation(name, locale, *, provider='libc', deterministic=True)Link to this definition#
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Creates a collation with the given name, locale and provider.

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Set the deterministic parameter to False to create a\nnon-deterministic collation, such as for case-insensitive filtering.

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\nclass RemoveCollation(name, locale, *, provider='libc', deterministic=True)Link to this definition#
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Removes the collations named name.

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When reversed this is creating a collation with the provided locale,\nprovider, and deterministic arguments. Therefore, locale is\nrequired to make this operation reversible.

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Concurrent index operationsLink to this heading#

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

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\nclass AddIndexConcurrently(model_name, index)Link to this definition#
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Like AddIndex, but creates an\nindex with the CONCURRENTLY option. This has a few caveats to be aware\nof when using this option, see the PostgreSQL documentation of building\nindexes concurrently.

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\nclass RemoveIndexConcurrently(model_name, name)Link to this definition#
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Like RemoveIndex, but removes the\nindex with the CONCURRENTLY option. This has a few caveats to be aware\nof when using this option, see the PostgreSQL documentation.

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Adding constraints without enforcing validationLink to this heading#

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PostgreSQL supports the NOT VALID option with the ADD CONSTRAINT\nstatement to add check constraints without enforcing validation on existing\nrows. This option is useful if you want to skip the potentially lengthy scan of\nthe table to verify that all existing rows satisfy the constraint.

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To validate check constraints created with the NOT VALID option at a later\npoint of time, use the\nValidateConstraint operation.

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See the PostgreSQL documentation for more details.

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\nclass AddConstraintNotValid(model_name, constraint)Link to this definition#
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Like AddConstraint, but avoids\nvalidating the constraint on existing rows.

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\nclass ValidateConstraint(model_name, name)Link to this definition#
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Scans through the table and validates the given check constraint on\nexisting rows.

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