I’m trying to exclude certain fields from being displayed in the list view of my serializer. To achieve this, I have overridden the to_representation method.
However, when I attempt to access the ‘request’ object using request = self.context.get('request'),
I encountered an error stating "’NoneType’ object has no attribute ‘data’.
this is serializer.py
from rest_framework import serializers
from todo.models import Task
class TodoSerializer(serializers.ModelSerializer):
short_content=serializers.ReadOnlyField(source='get_short_content')
author = serializers.CharField(source="author.username", read_only=True)
class Meta:
model = Task
fields =['id','title', 'author' ,'details' ,'short_content','isCompleted','created_date','updated_date']
read_only_fields=['author']
def to_representation(self,instance):
request=self.context.get('request')
rep =super().to_representation(instance)
print(request.data)
if request.parser_context.get('kwargs').get('pk'):
rep.pop('short_content',None)
else:
rep.pop('details',None)
return rep
views.py
from rest_framework import viewsets
from rest_framework.response import Response
from rest_framework.permissions import IsAuthenticated
from rest_framework import generics
from todo.models import Task
from .serializers import TodoSerializer
class TaskListViewSets(viewsets.ModelViewSet):
permission_classes=[IsAuthenticated]
queryset=Task.objects.all()
serializer_class=TodoSerializer
def get_queryset(self):
return Task.objects.filter(author=self.request.user.id)
def list(self, request):
queryset = self.get_queryset().filter(author=request.user)
serializer = TodoSerializer(queryset, many=True)
return Response(serializer.data)
def perform_create(self,serializer):
serializer.save(author=self.request.user)
Any insights into why I might be receiving this error and how to resolve it would be greatly appreciated. Thank you!
>Solution :
The request object is not available in context by default. In order to access it in TodoSerializer you have to explicitly add context={'request': request} when instantiating the serializer.
class TaskListViewSets(viewsets.ModelViewSet):
permission_classes=[IsAuthenticated]
queryset=Task.objects.all()
serializer_class=TodoSerializer
def get_queryset(self):
return Task.objects.filter(author=self.request.user.id)
def list(self, request):
queryset = self.get_queryset().filter(author=request.user)
serializer = TodoSerializer(queryset, many=True, context={'request': request})
return Response(serializer.data)
def perform_create(self,serializer):
serializer.save(author=self.request.user)