The official Tutorial 5 Relationships & Hyperlinked APIs doesn't mentions that when using HyperlinkedModelSerializer in manually instantiated serializers inside views (e.g., SnippetDetail, SnippetList), you must pass context={'request': request}.

Without this, url and related fields fail to resolve and raise errors like:

HyperlinkedIdentityField requires the request in the serializer context. Add context={'request': request} when instantiating the serializer.

Here is my view:

class SnippetDetailsOOP(APIView):
    permission_classes = [permissions.IsAuthenticatedOrReadOnly]
    def get_object(self,pk):
        try:
            return Snippet.objects.get(pk=pk)
        except Snippet.DoesNotExist:
            raise Http404
    def get(self,request,pk,format=None):
        data = self.get_object(pk)
        serializer = SnSerializer(data)
        return Response(serializer.data)
    def put(self,request,pk,format=None):
        snippetdata = self.get_object(pk)
        serializer = SnSerializer(snippetdata,data=request.data)
        if serializer.is_valid():
            serializer.save()
            return Response(serializer.data)
        return Response(serializer.errors,status=status.HTTP_400_BAD_REQUEST)
    def delete(self, request, pk, format=None):
        snippet = self.get_object(pk)
        snippet.delete()
        return Response(status=status.HTTP_204_NO_CONTENT)

Steps to reproduce:

1. Follow the tutorial instructions exactly as written.

2. Start the server.

3. Make a GET request to retrieve a snippet detail (or browse in the browsable API).

4. Observe the error due to missing context.

Importance :
Official Documentation is misguiding the people wasting their precious time and while being discussed on various forums, this hasn't been resolved till yet. I have solved this issue in my version of repo, i can open a PR after discussion.