Override encode_json() method in Django BaseView to use DjangoJSONEnc…

…oder (#3273)

Signed-off-by: Noam Stolero <noamstolero@gmail.com>

RELEASE.md

@@ -0,0 +1,3 @@
+Release type: minor
+
+Override encode_json() method in Django BaseView to use DjangoJSONEncoder

strawberry/django/views.py

@@ -13,6 +13,7 @@
 )
 
 from asgiref.sync import markcoroutinefunction
+from django.core.serializers.json import DjangoJSONEncoder
 from django.http import HttpRequest, HttpResponseNotAllowed, JsonResponse
 from django.http.response import HttpResponse
 from django.template import RequestContext, Template
@@ -159,8 +160,7 @@ def __init__(
     def create_response(
         self, response_data: GraphQLHTTPResponse, sub_response: HttpResponse
     ) -> HttpResponse:
-        data = self.encode_json(response_data)  # type: ignore
-
+        data = self.encode_json(response_data)
         response = HttpResponse(
             data,
             content_type="application/json",
@@ -177,6 +177,9 @@ def create_response(
 
         return response
 
+    def encode_json(self, response_data: GraphQLHTTPResponse) -> str:
+        return json.dumps(response_data, cls=DjangoJSONEncoder)
+
 
 class GraphQLView(
     BaseView,