[英]Django Rest API. Get all data from different models in a single API call
[英]how to fetch data from two different models in single api call in django rest frame work? is it possibel if yes then how?
我无法从 Django rest 框架中的单个视图获取两个模型的数据。 这是我到目前为止所做的,但我不确定如何使用单个视图从两个模型中获取数据。
urlpatterns = [
path('users/<int:id>/', GenericAPIView.as_view()),
path('users/', GenericAPIView.as_view()),
]
# User Serializer
class userSerializer(serializers.ModelSerializer):
class Meta:
model = User
fields = '__all__'
# usersdata serializer
class userdataSerializer(serializers.ModelSerializer):
class Meta:
model = UserData
fields = '__all__'
这是我的 views.py
class GenericAPIView(generics.GenericAPIView, mixins.ListModelMixin, mixins.CreateModelMixin, mixins.RetrieveModelMixin,
mixins.UpdateModelMixin):
serializer_class = userdataSerializer, userSerializer
queryset = UserData.objects.all()
lookup_field = 'id'
def get(self, request, id=None):
if id:
return self.retrieve(request)
else:
return self.list(request)
def post(self, request):
return self.create(request)
def put(self, request, id=None):
return self.update(request, id)
您可以修改其中一个序列化程序以包含另一个序列化程序。
class userSerializer(serializers.ModelSerializer):
user_data = userdataSerializer()
class Meta:
model = User
fields = ('field1', 'field2', 'user_data', ...)
我正在清除https://stackoverflow.com/users/8661327/eternal的答案(无法评论,声誉不够)。 我猜你想使用嵌套关系的概念。 从文档:
class TrackSerializer(serializers.ModelSerializer):
class Meta:
model = Track
fields = ['order', 'title', 'duration']
class AlbumSerializer(serializers.ModelSerializer):
tracks = TrackSerializer(many=True, read_only=True)
class Meta:
model = Album
fields = ['album_name', 'artist', 'tracks']
如果您看到相册的输出,它将显示如下:
{
'album_name': 'The Grey Album',
'artist': 'Danger Mouse',
'tracks': [
{'order': 1, 'title': 'Public Service Announcement', 'duration': 245},
{'order': 2, 'title': 'What More Can I Say', 'duration': 264},
{'order': 3, 'title': 'Encore', 'duration': 159},
...
],
}
在您的情况下,将serializers.py
修改为如下所示:
# User Serializer
class userSerializer(serializers.ModelSerializer):
user_data = userdataSerializer(many=True, read_only=True)
class Meta:
model = User
fields = '__all__'
fields += ["user_data"]
# usersdata serializer
class userdataSerializer(serializers.ModelSerializer):
class Meta:
model = UserData
fields = '__all__'
这样,您的User
包含来自UserData
模型的数据。
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