{"title":"Acuan index model","version":"3.1","locale":"id","docname":"ref/models/indexes","url":"/id/3.1/ref/models/indexes/","canonical":"https://djangodocs.dev/id/3.1/ref/models/indexes/","summary":"Index classes ease creating database indexes. They can be added using the Meta.indexes option. This document explains the API references of Index which includes the…","html":"

Acuan index modelLink to this heading#

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Index classes ease creating database indexes. They can be added using the\nMeta.indexes option. This document\nexplains the API references of Index which includes the index\noptions.

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Pilihan IndexLink to this heading#

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\nclass Index(fields=(), name=None, db_tablespace=None, opclasses=(), condition=None)Link to this definition#
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Membuat sebuah index (B-tree) dalam basisdata.

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fieldsLink to this heading#

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\nIndex.fieldsLink to this definition#
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Sebuah list atau tuple dari nama dari bidang-bidang dimana indeks diharapkan.

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By default, indexes are created with an ascending order for each column. To\ndefine an index with a descending order for a column, add a hyphen before the\nfield's name.

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For example Index(fields=['headline', '-pub_date']) would create SQL with\n(headline, pub_date DESC). Index ordering isn't supported on MySQL. In that\ncase, a descending index is created as a normal index.

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nameLink to this heading#

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\nIndex.nameLink to this definition#
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The name of the index. If name isn't provided Django will auto-generate a\nname. For compatibility with different databases, index names cannot be longer\nthan 30 characters and shouldn't start with a number (0-9) or underscore (_).

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db_tablespaceLink to this heading#

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\nIndex.db_tablespaceLink to this definition#
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The name of the database tablespace to use for\nthis index. For single field indexes, if db_tablespace isn't provided, the\nindex is created in the db_tablespace of the field.

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If Field.db_tablespace isn't specified (or if the index uses multiple\nfields), the index is created in tablespace specified in the\ndb_tablespace option inside the model's\nclass Meta. If neither of those tablespaces are set, the index is created\nin the same tablespace as the table.

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opclassesLink to this heading#

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\nIndex.opclassesLink to this definition#
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The names of the PostgreSQL operator classes to use for\nthis index. If you require a custom operator class, you must provide one for\neach field in the index.

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For example, GinIndex(name='json_index', fields=['jsonfield'],\nopclasses=['jsonb_path_ops']) creates a gin index on jsonfield using\njsonb_path_ops.

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opclasses are ignored for databases besides PostgreSQL.

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Index.name is required when using opclasses.

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conditionLink to this heading#

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\nIndex.conditionLink to this definition#
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If the table is very large and your queries mostly target a subset of rows,\nit may be useful to restrict an index to that subset. Specify a condition as a\nQ. For example, condition=Q(pages__gt=400)\nindexes records with more than 400 pages.

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Index.name is required when using condition.

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