migrate update

progress/views.py

@@ -23,18 +23,19 @@ class StudentWorkView(APIView):
     @staticmethod
     def get(request, teacher_token):
         client_status = request.GET.get('status', 'in_progress')
-        client_max_body = 50
         last_id = request.GET.get('last_id', 0)
         server_status = Q(status='fail') if \
-            client_status == 'not_done' else Q(status='wait') if client_status == 'in_progress' else Q(status='done')
+            client_status == 'not_done' else Q(status='wait') if client_status == 'in_progress'\
+            else Q(status='done')
         if request.user.is_authenticated() and request.user.groups.filter(name__in=['teachers', 'admin']).exists():
             try:
                 progress_lessons = ProgressLesson.objects.filter(
                     ~Q(progress__user__out_key=teacher_token),
+                    ~Q(comment_tokens__len=0),
                     server_status,
                     checker__out_key=teacher_token,
-                    id__gt=last_id
-                )[:client_max_body]
+                    id__gt=last_id,
+                )[last_id:50]
                 return Response([ProgressLessonSerializer(i).data for i in progress_lessons], status=200)
             except ValidationError:
                 return Response("Bad request", status=400)