给定以下具有两个多对多关系的模型:
class Child(models.Model):
name = models.CharField(max_length=80)
class Foo(models.Model):
bar = models.ManyToManyField(Child)
baz = models.ManyToManyField(Child)
这将产生以下错误:
accounts.foo: Accessor for m2m field 'bar' clashes with related m2m field 'Child.foo_set'. Add a related_name argument to the definition for 'bar'.
accounts.foo: Accessor for m2m field 'baz' clashes with related m2m field 'Child.foo_set'. Add a related_name argument to the definition for 'baz'.
很好;我不需要反向关系。According to the Django docs for related_name (据我所知只在ForeignKey下),我可以设置related_name="+"
,不会创建向后关系:
class Child(models.Model):
name = models.CharField(max_length=80)
class Foo(models.Model):
bar = models.ManyToManyField(Child, related_name="+")
baz = models.ManyToManyField(Child, related_name="+")
但这不起作用:
accounts.foo: Accessor for m2m field 'bar' clashes with related m2m field 'Child.+'. Add a related_name argument to the definition for 'bar'.
accounts.foo: Reverse query name for m2m field 'bar' clashes with related m2m field 'Child.+'. Add a related_name argument to the definition for 'bar'.
accounts.foo: Accessor for m2m field 'baz' clashes with related m2m field 'Child.+'. Add a related_name argument to the definition for 'baz'.
accounts.foo: Reverse query name for m2m field 'baz' clashes with related m2m field 'Child.+'. Add a related_name argument to the definition for 'baz'.
我需要做些什么来避免创建反向关系?
https://stackoverflow.com/questions/13918968
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