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クエリー式 — Django 4.0.6 ドキュメント 14097
" + tagname + " "); } }); $("div.highlight\\-html\\+django span.nf").each(function(i, elem) { va ... odules « previous | up | next » クエリー式 ¶ Query expressions describe a value or a computation that can be used ... irectly in filters. There are a number of built-in expressions (documented below) that can be used to help you wr ... ite queries. Expressions can be combined, or in some cases nested, to form ... modulo arithmetic, and the power operator on query expressions, using Python constants, variables, and even other ...
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PostgreSQL specific model indexes — Django 4.0.6 ドキュメント 12174
" + tagname + " "); } }); $("div.highlight\\-html\\+django span.nf").each(function(i, elem) { va ... .indexes module. BloomIndex ¶ class BloomIndex ( * expressions , length = None , columns = () , ** options ) ¶ Cr ... 4095. Changed in Django 3.2: Positional argument *expressions was added in order to support functional indexes. ... BrinIndex ¶ class BrinIndex ( * expressions , autosummarize = None , pages_per_range = None , ... teger. Changed in Django 3.2: Positional argument *expressions was added in order to support functional indexes. ...
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PostgreSQL specific query expressions — Django 4.0.6 ドキュメント 10958
" + tagname + " "); } }); $("div.highlight\\-html\\+django span.nf").each(function(i, elem) { va ... « previous | up | next » PostgreSQL specific query expressions ¶ These expressions are available from the django. ... contrib.postgres.expressions module. ArraySubquery() expressions ¶ class ArrayS ... import JSONObject >>> from django.contrib.postgres.expressions import ArraySubquery >>> books = Book . objects . ... ad', 'pages': 295}] 目次 PostgreSQL specific query expressions ArraySubquery() expressions 前のトピックへ Postgre ...
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PostgreSQL specific database constraints — Django 4.0.6 ドキュメント 10237
" + tagname + " "); } }); $("div.highlight\\-html\\+django span.nf").each(function(i, elem) { va ... onstraint ¶ class ExclusionConstraint ( * , name , expressions , index_type = None , condition = None , deferrabl ... sionConstraint. name ¶ The name of the constraint. expressions ¶ ExclusionConstraint. expressions ¶ An iterable o ... hich maps the operators with strings. For example: expressions = [ ( 'timespan' , RangeOperators . ADJACENT_TO ), ... nstraint ( name = 'exclude_overlapping_deferred' , expressions = [ ( 'timespan' , RangeOperators . OVERLAPS ), ], ...
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Conditional Expressions — Django 4.0.6 ドキュメント 9332
" + tagname + " "); } }); $("div.highlight\\-html\\+django span.nf").each(function(i, elem) { va ... dex | Modules « previous | up | next » Conditional Expressions ¶ Conditional expressions let you use if ... elif ... eturns the matching result expression. Conditional expressions can also be combined and nested like other express ... keyword. Changed in Django 4.0: Support for lookup expressions was added. Some examples: >>> from django.db.model ... me' ) >>> # Condition can be created using boolean expressions. >>> from django.db.models import Exists , OuterRe ...
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Constraints reference — Django 4.0.6 ドキュメント 9177
" + tagname + " "); } }); $("div.highlight\\-html\\+django span.nf").each(function(i, elem) { va ... ondition (i.e. non-partial unique constraints) and expressions (i.e. non-functional unique constraints) are diffe ... int. UniqueConstraint ¶ class UniqueConstraint ( * expressions , fields = () , name = None , condition = None , d ... ) ) ¶ Creates a unique constraint in the database. expressions ¶ UniqueConstraint. expressions ¶ New in Django 4. ... 0. Positional argument *expressions allows creating functional unique constraints on e ...
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Database Functions — Django 4.0.6 ドキュメント 8724
" + tagname + " "); } }); $("div.highlight\\-html\\+django span.nf").each(function(i, elem) { va ... egations, or filters in Django. Functions are also expressions , so they can be used and combined with other expr ... age_as_float ) 25.0 Coalesce ¶ class Coalesce ( * expressions , ** extra ) ¶ Accepts a list of at least two fiel ... d names or expressions and returns the first non-null value (note that an ... a>, <Author: Ülle>]> Greatest ¶ class Greatest ( * expressions , ** extra ) ¶ Accepts a list of at least two fiel ...
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Model index reference — Django 4.0.6 ドキュメント 8625
" + tagname + " "); } }); $("div.highlight\\-html\\+django span.nf").each(function(i, elem) { va ... els.<IndexClass> . Index options ¶ class Index ( * expressions , fields = () , name = None , db_tablespace = None ... one ) ¶ Creates an index (B-Tree) in the database. expressions ¶ Index. expressions ¶ New in Django 3.2. Position ... al argument *expressions allows creating functional indexes on expressions ... earest integer. Index.name is required when using *expressions . Restrictions on Oracle Oracle requires functions ...
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django.contrib.postgres — Django 4.0.6 ドキュメント 8059
" + tagname + " "); } }); $("div.highlight\\-html\\+django span.nf").each(function(i, elem) { va ... ints ExclusionConstraint PostgreSQL specific query expressions ArraySubquery() expressions PostgreSQL specific mo ... GinIndex GistIndex HashIndex SpGistIndex OpClass() expressions PostgreSQL specific lookups Trigram similarity Una ... lds , functions , database , data , not , search , expressions クイック検索 Last update: 2022年6月01日 « previous ...
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Django 3.2 release notes — Django 4.0.6 ドキュメント 7805
" + tagname + " "); } }); $("div.highlight\\-html\\+django span.nf").each(function(i, elem) { va ... grating such tables. Functional indexes ¶ The new *expressions positional argument of Index() enables creating fu ... nctional indexes on expressions and database functions. For example: from django.d ... rrayField now allow (non-nested) arrays containing expressions as right-hand sides. The new OpClass() expression ... allows creating functional indexes on expressions with a custom operator class. See Functional index ...
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