response returning no data django-rest

Question

i don't know whats wrong with this code, previously i was getting assertion error and now this

class OrganisationSerializer(ModelSerializer):
    products = ProductSerializer(many=True)   #manytomany field
    pictures = PicturesSerializer(source ='pictures_set',many=True)  #foreign key field
    class Meta:
        model = Organisation
        fields = ['name','address' ,'products','pictures']



@api_view(['GET'])
def get_data(request):
    data = None
    query_set = Organisation.objects.all()
    serialized_data = OrganisationSerializer(data = query_set,many =True)
    if serialized_data.is_valid():
        data = serialized_data.data
        print(data)
    return Response(data,status=status.HTTP_200_OK)

problem

returning no data

That means that your OrganisationSerializer is not valid, but that should always be the case, since you did not bound it with request data. — willeM_ Van Onsem
– willeM_ Van Onsem, Commented Oct 2, 2021 at 10:00

willeM_ Van Onsem · Accepted Answer · 2021-10-02 10:03:07Z

0

That means that your OrganisationSerializer is not valid, but that should always be the case, since you did not bound it with request data:

@api_view(['GET'])
def get_data(request):
    queryset = Organisation.objects.all()
    serializer = OrganisationSerializer(queryset, many=True)
    return Response(serializer.data, status=status.HTTP_200_OK)

We thus use the OrganisationSerializer to convert model objects to data, not constructing Organisation objects from data from the request.

answered Oct 2, 2021 at 10:03

willeM_ Van Onsem

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2 Comments

Atif Shafi Over a year ago

i still don't understand i thought they're used to convert, object instances to native types @Willem Van

willeM_ Van Onsem Over a year ago

@AtifShafi: yes, but the opposite direction as well: converting primitive types to Organisation objects (so deserializing). If you use this in serialization mode, then the serializer can not validate, since validation is only done to process primitive types to model objects.

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