move a user more UserAnswer features to base class

longs/models.py

@@ -755,6 +755,7 @@ class Exam(ExamBase):
 @reversion.register
 class UserAnswer(UserAnswerBase):
     """User answers by candidate"""
+    app_name = "longs"
 
     question = models.ForeignKey(
         Long, related_name="cid_user_answers", on_delete=models.CASCADE
@@ -813,8 +814,6 @@ class UserAnswer(UserAnswerBase):
     #    "AnswerMarks", related_name="user_answer", on_delete=models.SET_NULL, null=True, blank=True
     # )
 
-
-
     def __str__(self):
         try:
             exam = self.exam
@@ -879,8 +878,6 @@ class UserAnswer(UserAnswerBase):
             return True
         return False
 
-    def get_absolute_url(self):
-        return reverse("longs:user_answer_view", kwargs={"pk": self.pk})