NOT NULL Constraint fehlgeschlagen: device_api_devicegroup.owner_id

Question

Ich bekomme nicht null Contraint fehlgeschlagen Fehler beim Posten einer Gruppe. Wie soll ich das beheben? Ich möchte den Benutzer nicht in der API anzeigen, also habe ich ihn nicht in den Serializer-Feldern verwendet. Muss ich es dort zwangsweise hinzufügen?

Hier ist mein Modell, Serializer und APIView

class DeviceGroup(models.Model): 
    token = models.UUIDField(default=uuid.uuid4, unique=True, editable=False) 
    name = models.CharField(max_length=250, blank=False, null=False) 
    owner = models.ForeignKey(User, blank=False, null=False) 


class DeviceGroupSerializer(serializers.ModelSerializer): 
    id = serializers.UUIDField(source='token', format='hex', read_only=True) 
    class Meta: 
     model = DeviceGroup 
     fields = ['id','name'] 


class DevicesGroupsAPIView(APIView): 
    permission_classes = (permissions.IsAuthenticated,) 
    serializer_class = DeviceGroupSerializer 

    def get_object(self, user, token): 
     try: 
      return BaseDevice.objects.filter(owner=user).get(token=token) 
     except ObjectDoesNotExist: 
      return error.RequestedResourceNotFound().as_response() 

    def get(self, request, format=None): 
     """ 
      Returns a list of groups 
     """ 
     reply = {} 
     try: 
      groups = DeviceGroup.objects.filter(owner=request.user) 
      reply['data'] = DeviceGroupSerializer(groups, many=True).data 
     except: 
      reply['data'] = [] 
     return Response(reply, status.HTTP_200_OK) 

    def post(self, request, format=None): 
     """ 
     create a new group 
     """ 
     print('request.data', request.data) 
     print('user', request.user) 
     serializer = DeviceGroupSerializer(data=request.data) 
     print('serializer', serializer) 
     if serializer.is_valid(): 
      serializer.save() 
      return Response(serializers.data, status.HTTP_200_OK) 
     return Response(serializer.errors, status.HTTP_204_NO_CONTENT) 

Answer 1

diese sorgfältig zu sehen, die Benutzer nicht in request.data ist:

serializer = DeviceGroupSerializer(data={ 
    'name':request.data['name'], 
    'owner':request.user.id, 
}) 

überprüfen auch, dass der Serializer der Eigentümer verwendet werden können

from django.contrib.auth.models import User 

class DeviceGroupSerializer(serializers.ModelSerializer): 
    id = serializers.UUIDField(source='token', format='hex', read_only=True) 
    owner = serializers.PrimaryKeyRelatedField(queryset=User.objects.all()) 
    class Meta: 
     model = DeviceGroup 
     fields = ['id','name', 'owner']