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(guān)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(shè)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(xiàn)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(jīng)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?shù)腟erializer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(jīng)驗 獲得超6個贊
您可能會發(fā)現(xiàn)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(guī)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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