.

longs/models.py

@@ -192,7 +192,19 @@ class Long(models.Model):
         else:
             answers = self.cid_user_answers.filter(exam__id=exam_pk)
 
-        return [ans for ans in answers if not ans.is_marked()]
+        unmarked_answers = [ans for ans in answers if not ans.is_marked()]
+
+        if marker is None:
+            return unmarked_answers
+
+        # If marker is specified we check for what they have marker
+        marker_unmarked = []
+        for answer in unmarked_answers:
+            if answer.mark.filter(marker=marker).count() < 1:
+                marker_unmarked.append(answer)
+        
+        return marker_unmarked
+
 
     def get_question_json(self, based=True):
         # self == q?

longs/views.py

@@ -671,7 +671,10 @@ def mark_answer(request, exam_id, question_number, cid):
             previous_cid = cid_list[cid_list.index(cid)-1]
 
     try:
+        if exam.double_mark:
             unmarked = question.get_unmarked_answers(exam_pk=exam.id, marker=request.user)
+        else:
+            unmarked = question.get_unmarked_answers(exam_pk=exam.id)
         next_unmarked_id = unmarked[0].cid
         if next_unmarked_id == cid:
             next_unmarked_id = unmarked[1].cid