`HyperlinkedIdentityField` requires the request in the serializer context - nested

Question

I've already tried everything I could, but nothing works for me
My models:
model Parent():
...
model Child():
owner = models.ForeignKey(Parent, on_delete=models.CASCADE,
related_name='children')
...
My Urls:
router = routers.DefaultRouter()
router.register(r'parents', ParentViewSet, base_name="parents")
router.register(r'childs', ChildViewSet, base_name="childs")
urlpatterns = [
path('api/', include(router.urls)),
]
My serializers:
class ParentSerializer(serializers.ModelSerializer):
url = serializers.HyperlinkedIdentityField(view_name="parent-detail", lookup_field='pk')
children = serializers.SerializerMethodField()
class Meta:
model = User
fields = (
...
'children')
def get_children(self, obj):
queryset = Child.objects.filter(owner=obj)
children = ChildSerializer(queryset, many=True).data
return children
class ChildSerializer(serializers.ModelSerializer):
url = serializers.HyperlinkedIdentityField(view_name="child-detail", lookup_field='pk')
...
My Viewsets:
class ParentViewSet(SerializerByActionMixin, LoggingMixin, viewsets.ModelViewSet):
queryset = Parent.objects.all().prefetch_related('children').order_by('-date_joined')
serializers = {
'default': ParentSerializer,
'create': ParentCreateSerializer,
'update': ParentUpdateSerializer,
}
class ChildViewSet(LoggingMixin, viewsets.ModelViewSet):
queryset = Child.objects.all().order_by('-timestamp')
serializer_class = ChildSerializer
http_method_names = ['get', 'put', 'patch', 'head']
My problem:
HyperlinkedIdentityField requires the request in the serializer context. Add context={'request': request} when instantiating the serializer.
I read this, but don't understand where in my code paste this context.
Help please. Thanks!

Answer 1

As the documentation says, you'll need the request in the context:
class ParentSerializer(serializers.ModelSerializer):
...
def get_children(self, obj):
queryset = Child.objects.filter(owner=obj)
children = ChildSerializer(queryset, many=True, context=self.context).data
return children