英文:
Retrieve function for viewset without model
问题
I am using object without RDS entry.
class MyDummy(object):def __init__(self, **kwargs):for field in ('id', 'detail'):setattr(self, field, kwargs.get(field, None))mydummys = {1: MyDummy(id=1, detail={"test":"test"}),2: MyDummy(id=2, detail={"test2":"test2"})}
Serializer
class MyDummySerializer(serializers.Serializer):id = serializers.IntegerField(read_only=True)detail = serializers.JSONField(allow_null=True)def create(self, validated_data):return MyDummy(id=None, **validated_data)def update(self, instance, validated_data):for field, value in validated_data.items():setattr(instance, field, value)return instance
list function works well for now
class MyDummyViewSet(viewsets.ViewSet):serializer_class = s.MyDummySerializerdef list(self, request):serializer = s.MyDummySerializer(instance=m.mydummys.values(), many=True)return Response(serializer.data)
However now I want to make retrieve for URL like api/mydummy/1
class MyDummyViewSet(viewsets.ViewSet):serializer_class = s.MyDummySerializerdef list(self, request):serializer = s.MyDummySerializer(instance=m.mydummys.values(), many=True)return Response(serializer.data)def retrieve(self, request, pk=None):serializer = s.MyDummySerializer(instance=m.mydummys.values(), many=False)return Response(serializer.data)
It returns,
{"detail": null}
I think I should narrow it down by id in retrieve. How can I make it?
英文:
I am using object without RDS entry.
Model
class MyDummy(object):def __init__(self, **kwargs):for field in ('id', 'detail'):setattr(self, field, kwargs.get(field, None))mydummys = {1: MyDummy(id=1, detail={"test":"test"}),2: MyDummy(id=2,detail={"test2":"test2"})}
Serializer
class MyDummySerializer(serializers.Serializer):id = serializers.IntegerField(read_only=True)detail = serializers.JSONField(allow_null=True)def create(self, validated_data):return MyDummy(id=None, **validated_data)def update(self, instance, validated_data):for field, value in validated_data.items():setattr(instance, field, value)return instance
list function works well for now
class MyDummyViewSet(viewsets.ViewSet):serializer_class = s.MyDummySerializerdef list(self, request):serializer = s.MyDummySerializer(instance=m.mydummys.values(), many=True)return Response(serializer.data)
However now I want to make retreive for url like api/mydummy/1
class MyDummyViewSet(viewsets.ViewSet):serializer_class = s.MyDummySerializerdef list(self, request):serializer = s.MyDummySerializer(instance=m.mydummys.values(), many=True)return Response(serializer.data)def retrieve(self, request, pk=None):serializer = s.MyDummySerializer(instance=m.mydummys.values(), many=False)return Response(serializer.data)
It returns,
{"detail": null}
I think I should narrowing by id in retrieve.
How can I make it ?
答案1
得分: 1
你需要按照字典的键来过滤它，就像这样：
class MyDummyViewSet(viewsets.ViewSet):# ... 其他列表视图的部分 ...def retrieve(self, request, pk=None):instance = m.mydummys.get(int(pk))if instance is None:return Response(status=status.HTTP_404_NOT_FOUND)serializer = s.MyDummySerializer(instance=instance)return Response(serializer.data)
这将尝试从 mydummys 字典中获取具有键 pk 的 MyDummy 对象。
英文:
You would need to filter it by the key of the dict like this:
class MyDummyViewSet(viewsets.ViewSet):# ... rest of your list view ...def retrieve(self, request, pk=None):instance = m.mydummys.get(int(pk))if instance is None:return Response(status=status.HTTP_404_NOT_FOUND)serializer = s.MyDummySerializer(instance=instance)return Response(serializer.data)
This would try to get MyDummy object that has a key pk in mydummys dict.
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