I need to write an api method in the Django Rest Framework that has the ability to get model fields and use them to get model values
I have written the following code for api method:
class RadioStationDynamicFields(APIView): def post(self, request): field_names = request.data.get('fields') if not field_names: return Response({"error": "fields are not specified."}, status=status.HTTP_400_BAD_REQUEST) try: radiostations = RadioStation.objects.all() serializer = RadioStationSerializer(radiostations, many=True, fields=field_names) return Response(serializer.data, status=status.HTTP_200_OK) except Exception as e: return Response({"error": str(e)}, status=status.HTTP_500_INTERNAL_SERVER_ERROR)When transmitting data in the form of {"fields":"some_field"}, I get an error:{ "error": "Field.__init__() got an unexpected keyword argument 'fields'" }\
My serializer:
class AddPointsSerializer(serializers.ModelSerializer): class Meta: model = AddPoints fields = ('locality')class RadioStationSerializer(serializers.ModelSerializer): add_points = serializers.PrimaryKeyRelatedField( queryset=Locality.objects.all(), many=True, required=False ) class Meta: model = RadioStation fields = '__all__' def to_internal_value(self, data): if 'locality' in data: try: data['locality'] = Locality.objects.get(name=data['locality']).pk except Locality.DoesNotExist: raise serializers.ValidationError({'locality': 'Locality not found'}) if 'radio_channel' in data: try: data['radio_channel'] = RadioChannel.objects.get(name=data['radio_channel']).pk except RadioChannel.DoesNotExist: raise serializers.ValidationError({'radio_channel': 'RadioChannel not found'}) if 'add_points' in data: add_points = [] for point in data['add_points']: try: add_points.append(Locality.objects.get(name=point).pk) except Locality.DoesNotExist: raise serializers.ValidationError({'add_points': f'Locality {point} not found'}) data['add_points'] = add_points return super().to_internal_value(data) def update(self, instance, validated_data): if 'add_points' in validated_data: add_points = validated_data.pop('add_points') instance.add_points.set(add_points) return super().update(instance, validated_data) def __init__(self, *args, **kwargs): super(RadioStationSerializer, self).__init__(*args, **kwargs) if self.context.get('request').method in ['GET']: self.fields['radio_channel'] = serializers.StringRelatedField() self.fields['locality'] = serializers.StringRelatedField() self.fields['add_points'] = serializers.StringRelatedField(many=True, read_only=True)`What should I do to make this method work ?