context in nested serializers django rest framework

Question

If i have a nested serializer:

class ChildSerializer(ModelSerializer):
    class Meta:
        fields = (\'c_name\', )
        model = Child


class ParentSe         


        

Answer 1

Ok, I have found an ultimate solution that will do exactly what was asked - pass context down to nested serializers. To achieve that one need to override to_representation(self, instance) of the nested serializer, so it looks like:

def to_representation(self, instance):
    # here we update current serializer's context (access it as self._context)
    # to access parent's context we use parent.context
    # if there is no parent than it's the first serializer in the chain and it doesn't need any context except for itself's
    # for example (after all the checks)
    self._context["request"] = self.parent.context["request"]
    # and that is it! The modified context will be used for serialization as if it was passed as usually
    return super().to_representation(instance)