我用夹层。它有型号:
class AssignedKeyword(Orderable):
"""
A ``Keyword`` assigned to a model instance.
"""
keyword = models.ForeignKey("Keyword", related_name="assignments")
content_type = models.ForeignKey("contenttypes.ContentType")
object_pk = models.IntegerField()
content_object = GenericForeignKey("content_type", "object_pk")
class Meta:
order_with_respect_to = "content_object"
def __unicode__(self):
return unicode(self.keyword)
我想获取所有唯一的 AssignedKeyword 模型实例,其中content_object
字段类型为Post
. 如何按字段类型过滤查询集?