migrate teh rest

physics/models.py

@@ -136,11 +136,21 @@ class Question(QuestionBase):
         return ((0,) * 5, ("Not answered",) * 5)
 
 
+class ExamQuestionDetail(models.Model):
+    sort_order = models.IntegerField(default=1000)
+
+    exam = models.ForeignKey("Exam", on_delete=models.CASCADE)
+    rapid = models.ForeignKey(Question, on_delete=models.CASCADE)
+
+    class Meta:
+        ordering = ("sort_order",)
+
 #@reversion.register
 class Exam(ExamBase):
     app_name = "physics"
 
-    exam_questions = SortedManyToManyField(Question, related_name="exams", blank="true")
+    #exam_questions = SortedManyToManyField(Question, related_name="exams", blank="true")
+    exam_questions = models.ManyToManyField(Question, through=ExamQuestionDetail, related_name="exams")
 
     time_limit = models.IntegerField(
         help_text="Exam time limit (in seconds)",