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- Django 1.5 release notes — Django 4.0.6 ドキュメント 6586
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... ou call save() . This can help in high-concurrency operations, and can improve performance. Better support for ... o.http.HttpRequest.get_host() will raise SuspiciousOperation . For more details see the full documentation for ... ted, but would have failed as soon as any database operation was attempted (usually with a "table does not exis ...
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https://man.plustar.jp/django/releases/1.5.html
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- データベースアクセスの最適化 — Django 4.0.6 ドキュメント 6586
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... ptimization techniques that apply to all expensive operations, such as general purpose caching . QuerySet を理解 ... Ordering is not free; each field to order by is an operation the database must perform. If a model has a defaul ...
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https://man.plustar.jp/django/topics/db/optimization.html
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- クエリを作成する — Django 4.0.6 ドキュメント 6586
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... elta ( days = 3 )) The F() objects support bitwise operations by .bitand() , .bitor() , .bitxor() , .bitrightsh ... d ( 16 ) Oracle Oracle doesn't support bitwise XOR operation. Expressions can reference transforms ¶ New in Dja ... nverted directly to an SQL statement. It is a bulk operation for direct updates. It doesn't run any save() meth ...
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https://man.plustar.jp/django/topics/db/queries.html
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- パフォーマンスと最適化 — Django 4.0.6 ドキュメント 6586
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... faster than the template language can: # QuerySet operation on the database # fast, because that's what databa ... ired from the database. On the other hand, certain operations will force the evaluation of a QuerySet . Avoidin ...
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https://man.plustar.jp/django/topics/performance.html
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- Django オブジェクトのシリアル化 — Django 4.0.6 ドキュメント 6586
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... is ensures that deserializing is a non-destructive operation even if the data in your serialized representation ...
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https://man.plustar.jp/django/topics/serialization.html
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- Advanced testing topics — Django 4.0.6 ドキュメント 6586
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... imary key reset is a relatively expensive database operation. Enforce running test classes sequentially ¶ If yo ...
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https://man.plustar.jp/django/topics/testing/advanced.html
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- Django 1.11 リリースノート — Django 4.0.6 ドキュメント 6467
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... The new CIText mixin and CITextExtension migration operation allow using PostgreSQL's citext extension for case ... eded in third-party database backends. The DatabaseOperations.time_trunc_sql() method is added to support TimeF ... ther 'hour' , 'minute' , or 'second' . The DatabaseOperations.datetime_cast_time_sql() method is added to suppo ...
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https://man.plustar.jp/django/releases/1.11.html
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- Django's cache framework — Django 4.0.6 ドキュメント 6467
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... or as a list. While using multiple servers, write operations are performed on the first server (leader). Read ... , the following router would direct all cache read operations to cache_replica , and all write operations to ca ... Router : """A router to control all database cache operations""" def db_for_read ( self , model , ** hints ): " ... All cache read operations go to the replica" if model . _meta . app_label = ...
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https://man.plustar.jp/django/topics/cache.html
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- タイムゾーン — Django 4.0.6 ドキュメント 6467
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... g tests. You'll quickly learn how to avoid invalid operations. On the other hand, bugs caused by the lack of ti ... verting a datetime to a date isn't a deterministic operation. What does this mean in practice? Generally, you s ...
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https://man.plustar.jp/django/topics/i18n/timezones.html
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- モデルフィールドリファレンス — Django 4.0.6 ドキュメント 6347
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... different object that is being deleted in the same operation, but via a CASCADE relationship. 以下のような一連の ...
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https://man.plustar.jp/django/ref/models/fields.html
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