... になったときは、すぐに評価を行います。 例えば、 User と多対多の関連をもつ Group モデルを考えたとき、以下のコードが最適です: members = group . members . all () if display_group_members : if members : if current_user in members : print ( "You and" , len ( ... members ) - 1 , "other users are members of this group." ) else : print ( "There are" , len ( members ), "members in this group." ) for member in members : print ( ... member . username ) else : print ( "There are no members in this group." ) 最適である理由: クエリセットは遅延評価されるので、 display_group_members が False の場合、データベースク ... ... になったときは、すぐに評価を行います。 例えば、 User と多対多の関連をもつ Group モデルを考えたとき、以下のコードが最適です: members = group . members . all () if display_group_members : if members : if current_user in members : print ( "You and" , len ( ... members ) - 1 , "other users are members of this group." ) else : print ( "There are" , len ( members ), "members in this group." ) for member in members : print ( ... member . username ) else : print ( "There are no members in this group." ) 最適である理由: クエリセットは遅延評価されるので、 display_group_members が False の場合、データベースク ... ... indocs ¶ Staff members could use the admindocs TemplateDetailView view to check the existence of arbitrary files. Additionally, if (and only if) ... determinate attacks validators leading zeros リリースノート June fixes security issues Potential directory traversal Staff members TemplateDetailView view check クイック検索 Last update: 2026年10月09日 « previous | up | next » ... ... indocs ¶ Staff members could use the admindocs TemplateDetailView view to check the existence of arbitrary files. Additionally, if (and only if) ... determinate attacks validators leading zeros リリースノート June fixes security issues Potential directory traversal Staff members TemplateDetailView view check クイック検索 Last update: 2026年10月09日 « previous | up | next » ... ... ) def __str__ ( self ): return self . name class Group ( models . Model ): name = models . CharField ( max_length = 128 ) members = models . ManyToManyField ( Person , through = "Membership" ) def __str__ ( self ): return self . name class Membership ( ... ず指定する必要があります。指定しない場合はバリデーションエラーが発生します。 これで ManyToManyField が中間モデル (この場合は Membership ) を使うように設定できたので、多対多のリレーションシップを作成する準備ができました。これを行うには、中間モデルのインスタ ... on . objects . create ( name = "Paul McCartney" ) >>> beatles = Group . objects . create ( name = "The Beatles" ) >>> m1 = Membership ( ... person = ringo , ... group = beatles , ... date_joined = date ( 1962 , 8 , 16 ), ... invite_reason = "Needed a ne ... ... ) def __str__ ( self ): return self . name class Group ( models . Model ): name = models . CharField ( max_length = 128 ) members = models . ManyToManyField ( Person , through = "Membership" ) def __str__ ( self ): return self . name class Membership ( ... ず指定する必要があります。指定しない場合はバリデーションエラーが発生します。 これで ManyToManyField が中間モデル (この場合は Membership ) を使うように設定できたので、多対多のリレーションシップを作成する準備ができました。これを行うには、中間モデルのインスタ ... on . objects . create ( name = "Paul McCartney" ) >>> beatles = Group . objects . create ( name = "The Beatles" ) >>> m1 = Membership ( ... person = ringo , ... group = beatles , ... date_joined = date ( 1962 , 8 , 16 ), ... invite_reason = "Needed a ne ... ... r, it handled introspection in a non-standard way, depending on wrapped objects implementing a public method named get_all_members() . Since this could easily lead to name clashes, it has been changed to use the standard Python introspection method, inv ... olving __members__ and __dir__() . If you used LazyObject in your own code and implemented the get_all_members() method for wrapped objects ... r__() or other methods that allow for attributes not discoverable by normal mechanisms), you can simply remove the get_all_members() method. The default implementation on LazyObject will do the right thing. If you have more complex requirements for intr ... ... r, it handled introspection in a non-standard way, depending on wrapped objects implementing a public method named get_all_members() . Since this could easily lead to name clashes, it has been changed to use the standard Python introspection method, inv ... olving __members__ and __dir__() . If you used LazyObject in your own code and implemented the get_all_members() method for wrapped objects ... r__() or other methods that allow for attributes not discoverable by normal mechanisms), you can simply remove the get_all_members() method. The default implementation on LazyObject will do the right thing. If you have more complex requirements for intr ... ... indocs ¶ Staff members could use the admindocs TemplateDetailView view to check the existence of arbitrary files. Additionally, if (and only if) ... ... indocs ¶ Staff members could use the admindocs TemplateDetailView view to check the existence of arbitrary files. Additionally, if (and only if) ... 2026年10月08日