foo.py

# context.py
from django.utils.functional import cached_property
from gql.loaders import CommentsByArticleIdLoader


class GQLContext:

    def __init__(self, request):
        self.request = request
        self.loaders = {
            'comments_by_article_id_loader': CommentsByArticleIdLoader(),
        }

    def __call__(self):
        for method_, instance in self.loaders.items():
            setattr(self.request, method_, instance)
        return self.request
        
# views.py
from graphene_django.views import GraphQLView
from gql.context import GQLContext

class CustomGraphQLView(GraphQLView):

    def get_context(self, request):
        return GQLContext(request)()