... key validation ( #31654 ). Fixed a regression in Django 3.0.7 that caused a queryset crash when grouping by a many-to-one relationship ( #31660 ). Reallowed, following a regression in Django 3.0, non-expressions having a filterable attribute to be used as t ... ash リリースノート July messages InvalidCacheKey exceptions CacheKeyWarning warnings raised cache validation grouping many relationship Reallowed following expressions filterable attribute クイック検索 Last update: 2026年10月09日 « previous | up | next » ... ... key validation ( #31654 ). Fixed a regression in Django 3.0.7 that caused a queryset crash when grouping by a many-to-one relationship ( #31660 ). Reallowed, following a regression in Django 3.0, non-expressions having a filterable attribute to be used as t ... ... す。 It works backwards, too. While it can be customized by setting related_query_name , by default you refer to a "reverse" relationship in a lookup using the lowercase name of the model. 次の例は、少なくとも1つの headline が 'Lennon' を含む Entry を持つ、すべ ... FieldError >>> Entry . objects . update ( headline = F ( "blog__name" )) リレーション先のオブジェクト ¶ When you define a relationship in a model (with ForeignKey , OneToOneField , or ManyToManyField ), instances of the model class gain accessor attributes ... ではありませんが、興味がある人のためにここに書いておきます)。 Django also creates API accessors for the "other" side of the relationship -- the link from the related model to the model that defines the relationship. For example, a Blog object b has a manager ... ... す。 It works backwards, too. While it can be customized by setting related_query_name , by default you refer to a "reverse" relationship in a lookup using the lowercase name of the model. 次の例は、少なくとも1つの headline が 'Lennon' を含む Entry を持つ、すべ ... FieldError >>> Entry . objects . update ( headline = F ( "blog__name" )) リレーション先のオブジェクト ¶ When you define a relationship in a model (with ForeignKey , OneToOneField , or ManyToManyField ), instances of the model class gain accessor attributes ... ではありませんが、興味がある人のためにここに書いておきます)。 Django also creates API accessors for the "other" side of the relationship -- the link from the related model to the model that defines the relationship. For example, a Blog object b has a manager ... ... removed. model attribute on private model relations ¶ In earlier versions of Django, on a model with a reverse foreign key relationship (for example), model._meta.get_all_related_objects() returned the relationship as a django.db.models.related.RelatedObject ... with the model attribute set to the source of the relationship. Now, this method returns the relationship as django.db.models.fields.related.ManyToOneRel (private API RelatedObject has ... been removed), and the model attribute is set to the target of the relationship instead of the source. The source model is accessible on the related_model attribute instead. Consider this example from t ... ... removed. model attribute on private model relations ¶ In earlier versions of Django, on a model with a reverse foreign key relationship (for example), model._meta.get_all_related_objects() returned the relationship as a django.db.models.related.RelatedObject ... with the model attribute set to the source of the relationship. Now, this method returns the relationship as django.db.models.fields.related.ManyToOneRel (private API RelatedObject has ... been removed), and the model attribute is set to the target of the relationship instead of the source. The source model is accessible on the related_model attribute instead. Consider this example from t ... ... og b. Similar to add() , e.save() is called in the example above to perform the update. Using remove() with a many-to-many relationship, however, will delete the relationships using QuerySet.delete() which means no model save() methods are called; listen to ... the m2m_changed signal if you wish to execute custom code when a relationship is deleted. 多対多のリレーションシップの場合、 remove() は *objs 引数としてモデルインスタンスかフィールドの値（通常は主キー ... ... og b. Similar to add() , e.save() is called in the example above to perform the update. Using remove() with a many-to-many relationship, however, will delete the relationships using QuerySet.delete() which means no model save() methods are called; listen to ... the m2m_changed signal if you wish to execute custom code when a relationship is deleted. 多対多のリレーションシップの場合、 remove() は *objs 引数としてモデルインスタンスかフィールドの値（通常は主キー ... ... imization in Django 2.2 ( #29725 ) that caused the inconsistent behavior of count() and exists() on a reverse many-to-many relationship with a custom manager ( #30325 ). Fixed a regression in Django 2.2 where Paginator crashes if object_list is a queryset or ... ... imization in Django 2.2 ( #29725 ) that caused the inconsistent behavior of count() and exists() on a reverse many-to-many relationship with a custom manager ( #30325 ). Fixed a regression in Django 2.2 where Paginator crashes if object_list is a queryset or ... 2026年10月08日