我有一个可以连接到其他模型的模型。
class Attachable(models.Model):
content_type = models.ForeignKey(ContentType)
object_pk = models.TextField()
content_object = generic.GenericForeignKey(ct_field="content_type", fk_field="object_pk")
class Meta:
abstract = True
class Flag(Attachable):
user = models.ForeignKey(User)
flag = models.SlugField()
timestamp = models.DateTimeField()
我正在另一个模型中创建与该模型的通用关系。
flags = generic.GenericRelation(Flag)
我尝试从这种通用关系中获取对象，如下所示：
self.flags.all()
这会导致以下异常：
>>> obj.flags.all()
Traceback (most recent call last):
File "<console>", line 1, in <module>
File "/usr/local/lib/python2.6/dist-packages/django/db/models/manager.py", line 105, in all
return self.get_query_set()
File "/usr/local/lib/python2.6/dist-packages/django/contrib/contenttypes/generic.py", line 252, in get_query_set
return superclass.get_query_set(self).filter(**query)
File "/usr/local/lib/python2.6/dist-packages/django/db/models/query.py", line 498, in filter
return self._filter_or_exclude(False, *args, **kwargs)
File "/usr/local/lib/python2.6/dist-packages/django/db/models/query.py", line 516, in _filter_or_exclude
clone.query.add_q(Q(*args, **kwargs))
File "/usr/local/lib/python2.6/dist-packages/django/db/models/sql/query.py", line 1675, in add_q
can_reuse=used_aliases)
File "/usr/local/lib/python2.6/dist-packages/django/db/models/sql/query.py", line 1569, in add_filter
negate=negate, process_extras=process_extras)
File "/usr/local/lib/python2.6/dist-packages/django/db/models/sql/query.py", line 1737, in setup_joins
"Choices are: %s" % (name, ", ".join(names)))
FieldError: Cannot resolve keyword 'object_id' into field. Choices are: content_type, flag, id, nestablecomment, object_pk, timestamp, user
>>> obj.flags.all(object_pk=obj.pk)
Traceback (most recent call last):
File "<console>", line 1, in <module>
TypeError: all() got an unexpected keyword argument 'object_pk'
我做错了什么？