.

physics/views.py

@@ -101,7 +101,7 @@ def active_exams(request):
 def exam_scores_cid_user(request, pk, cid=None, passcode=None):
     exam = get_object_or_404(Exam, pk=pk)
 
-    if not request.user and not exam.check_cid_user(cid, passcode, request):
+    if cid is not None and not exam.check_cid_user(cid, passcode, request):
         raise Http404("Error accessing exam")
 
     questions = exam.exam_questions.all()
@@ -203,12 +203,12 @@ def exam_take_overview(request, pk, cid=None, passcode=None):
     if not exam.active:
         raise Http404("Exam not found")
 
-    if not request.user and not exam.check_cid_user(cid, passcode):
+    if cid is not None and not exam.check_cid_user(cid, passcode):
         raise Http404("Error accessing exam")
 
     questions = exam.exam_questions.all()
 
-    if request.user:
+    if cid is not None:
         answers = CidUserAnswer.objects.filter(user=request.user, exam=exam)
     else:
         answers = CidUserAnswer.objects.filter(cid=cid, exam=exam)
@@ -227,7 +227,7 @@ def exam_take_overview(request, pk, cid=None, passcode=None):
         else:
             question_answer_tuples.append((q, None))
 
-    if request.user:
+    if cid is not None:
         cid_user_exam = exam.get_or_create_cid_user_exam(user_user=request.user)
     else:
         c = CidUser.objects.filter(cid=cid).first()
@@ -255,10 +255,10 @@ def exam_take(request, pk, sk, cid=None, passcode=None):
     if not exam.active:
         raise Http404("Exam not found")
 
-    if not request.user and not exam.check_cid_user(cid, passcode):
+    if cid is not None and not exam.check_cid_user(cid, passcode):
         raise Http404("Error accessing exam")
 
-    if request.user:
+    if cid is not None:
         cid_user_exam = exam.get_or_create_cid_user_exam(user_user=request.user)
     else:
         c = CidUser.objects.filter(cid=cid).first()
@@ -270,7 +270,7 @@ def exam_take(request, pk, sk, cid=None, passcode=None):
 
     pos = exam.get_question_index(question)
 
-    if request.user:
+    if cid is not None:
         answer = question.cid_user_answers.filter(user=request.user, exam=exam).first()
     else:
         answer = question.cid_user_answers.filter(cid=cid, exam=exam).first()
@@ -283,7 +283,7 @@ def exam_take(request, pk, sk, cid=None, passcode=None):
         if form.is_valid() and not exam.publish_results:
             answer = form.save(commit=False)
 
-            if request.user:
+            if cid is not None:
                 answer.user = request.user
             else:
                 answer.cid = cid
@@ -295,7 +295,7 @@ def exam_take(request, pk, sk, cid=None, passcode=None):
             cid_user_exam.end_time = timezone.now()
             cid_user_exam.save()
 
-        if request.user:
+        if cid is not None:
             kwargs = {"pk": pk}
             take_url = "physics:exam_take_user"
             finish_url = "physics:exam_take_overview_user"