fixes

rapids/views.py

@@ -19,7 +19,7 @@ from django.http import Http404, JsonResponse
 from django.http import HttpResponseRedirect, HttpResponse
 
 from .forms import (
-    MarkRapidQuestionForm, RapidForm,
+    RapidForm,
     ImageFormSet,
     NoteForm,
     RegionForm,
@@ -819,7 +819,7 @@ def exam_json(request, pk):
     if not exam.active:
         raise Http404("No available exam")
 
-    exam_json_cache = cache.get("exam_json_{}".format(pk))
+    exam_json_cache = cache.get("rapids_exam_json_{}".format(pk))
 
     if exam_json_cache is not None and not exam.recreate_json:
         exam_json_cache["cached"] = True
@@ -855,7 +855,7 @@ def exam_json(request, pk):
         }
 
         if feedback_images:
-            exam_questions["feedback_image"] = feedback_images
+            exam_questions[q.id]["feedback_image"] = feedback_images
 
 
     exam_json = {
@@ -874,7 +874,7 @@ def exam_json(request, pk):
     exam.recreate_json = False
     exam.save()
 
-    cache.set("exam_json_{}".format(pk), exam_json, 3600)
+    cache.set("rapids_exam_json_{}".format(pk), exam_json, 3600)
 
     return JsonResponse(exam_json)