我想提供兩個不同的序列化器，但仍然可以從以下所有功能中受益ModelViewSet：當查看對象列表時，我希望每個對象都有一個重定向到其詳細信息的url，并使用__unicode __目標模型來顯示其他所有關系。例：{ "url": "http://127.0.0.1:8000/database/gruppi/2/", "nome": "universitari", "descrizione": "unitn!", "creatore": "emilio", "accesso": "CHI", "membri": [ "emilio", "michele", "luisa", "ivan", "saverio" ]}查看對象的詳細信息時，我想使用默認值 HyperlinkedModelSerializer例：{ "url": "http://127.0.0.1:8000/database/gruppi/2/", "nome": "universitari", "descrizione": "unitn!", "creatore": "http://127.0.0.1:8000/database/utenti/3/", "accesso": "CHI", "membri": [ "http://127.0.0.1:8000/database/utenti/3/", "http://127.0.0.1:8000/database/utenti/4/", "http://127.0.0.1:8000/database/utenti/5/", "http://127.0.0.1:8000/database/utenti/6/", "http://127.0.0.1:8000/database/utenti/7/" ]}我設法按照以下方式完成了所有這些工作：serializers.py# serializer to use when showing a listclass ListaGruppi(serializers.HyperlinkedModelSerializer): membri = serializers.RelatedField(many = True) creatore = serializers.RelatedField(many = False) class Meta: model = models.Gruppi# serializer to use when showing the detailsclass DettaglioGruppi(serializers.HyperlinkedModelSerializer): class Meta: model = models.Gruppiviews.pyclass DualSerializerViewSet(viewsets.ModelViewSet): """ ViewSet providing different serializers for list and detail views. Use list_serializer and detail_serializer to provide them """ def list(self, *args, **kwargs): self.serializer_class = self.list_serializer return viewsets.ModelViewSet.list(self, *args, **kwargs) def retrieve(self, *args, **kwargs): self.serializer_class = self.detail_serializer return viewsets.ModelViewSet.retrieve(self, *args, **kwargs)基本上，我會檢測用戶何時請求列表視圖或詳細視圖，并進行更改serializer_class以滿足我的需求。不過，我對這段代碼并不真正滿意，它看起來像是骯臟的駭客，而且最重要的是，如果兩個用戶同時請求列表和詳細信息怎么辦？有沒有更好的方法可以實現此目的，ModelViewSets還是我必須退后使用GenericAPIView？
3 回答
斯蒂芬大帝
TA貢獻1827條經驗 獲得超8個贊
覆蓋您的get_serializer_class方法。您的模型mixins中使用此方法來檢索適當的Serializer類。
請注意，還有一種get_serializer方法可以返回正確的Serializer 的實例
class DualSerializerViewSet(viewsets.ModelViewSet):
def get_serializer_class(self):
if self.action == 'list':
return serializers.ListaGruppi
if self.action == 'retrieve':
return serializers.DettaglioGruppi
return serializers.Default # I dont' know what you want for create/destroy/update.
慕哥9229398
TA貢獻1877條經驗 獲得超6個贊
您可能會發現此mixin有用，它覆蓋了get_serializer_class方法，并允許您聲明一個將操作和序列化程序類或后備映射到常規行為的字典。
class MultiSerializerViewSetMixin(object):
def get_serializer_class(self):
"""
Look for serializer class in self.serializer_action_classes, which
should be a dict mapping action name (key) to serializer class (value),
i.e.:
class MyViewSet(MultiSerializerViewSetMixin, ViewSet):
serializer_class = MyDefaultSerializer
serializer_action_classes = {
'list': MyListSerializer,
'my_action': MyActionSerializer,
}
@action
def my_action:
...
If there's no entry for that action then just fallback to the regular
get_serializer_class lookup: self.serializer_class, DefaultSerializer.
"""
try:
return self.serializer_action_classes[self.action]
except (KeyError, AttributeError):
return super(MultiSerializerViewSetMixin, self).get_serializer_class()
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