Django Rest Framework 实现多对多关系

Question

我想实现一种 many to many 关系，这样一个人可以加入多个社交俱乐部，一个社交俱乐部可以有多个成员。这是我得到的结果，但是它没有显示电影的详细信息，序列化给我一个错误 -
Original exception text was: 'ManyRelatedManager' object has no attribute 'club_name'.

models.py

class Club(models.Model):
  club_name = models.CharField(default='',blank=False,max_length=100)

class Person(models.Model):
  person_name = models.CharField(default='',blank=False,max_length=200)
  clubs = models.ManyToManyField(Club)

serializers.py

class ClubSerializer(serializers.ModelSerializer):
  class Meta:
    model = Club
    fields = ('url','id','club_name','person')

class PersonSerializer(serializers.ModelSerializer):
  clubs = ClubSerializer()
  class Meta:
    model = Person
    fields = ('url','id','person_name','clubs')

views.py

class ClubDetail(generics.ListCreateAPIView):
serializer_class = ClubSerializer

  def get_queryset(self):
    club = Clubs.objects.get(pk=self.kwargs.get('pk',None))
    persons = Person.objects.filter(club=club)
    return persons

class ClubList(generics.ListCreateAPIView):
  queryset = Club.objects.all()
  serializer_class = ClubSerializer


class PersonDetail(generics.RetrieveUpdateDestroyAPIView):
  serializer_class = PersonSerializer


def get_object(self):
  person_id = self.kwargs.get('pk',None)
  return Person.objects.get(pk=person_id)

urls.py

urlpatterns = format_suffix_patterns([
url(r'^$', views.api_root),
url(r'^clubs/$',
views.ClubList.as_view(),
name='club-list'),
url(r'^clubs/(?P<pk>[0-9]+)/persons/$',
views.ClubDetail.as_view(),
name='club-detail'),
url(r'^person/(?P<pk>[0-9]+)/$',
views.PersonDetail.as_view(),
name='person-detail'),
])

在我的本地服务器上，我得到了俱乐部列表，该列表将我导航到俱乐部详细信息视图，但它不显示电影名称，或者，但我看不到人员列表。我该如何正确执行此操作？

Answer 1

您的代码中存在许多问题。即：

ClubSerializer.Meta.fields - 人应该是 person_set
PersonSerializer - 俱乐部应该是 clubs = ClubSerializer(many=True)
ClubDetail.serializer_class - ClubSerializer 应该是 PersonSerializer
ClubDetail - 查询集应该是 persons = Person.objects.filter(clubs=club)

如果您解决了上述问题，您应该能够导航至 ClubDetail 并查看俱乐部成员列表。

Answer 2

如果您使用的是多对多关系，请确保显式声明该字段，如下所示：

class WidgetSerializer(serializers.HyperlinkedModelSerializer):
    
    parts__part = serializers.CharField()
    

    class Meta:
        model = Widget
        fields = ['date', 'url', 'type','parts__part']

Django Rest Framework 实现多对多关系

Django Rest Framework implementing many to many relationship

python

django

rest

django-serializer

django-rest-framework