Add comment revision count field

judge/models/comment.py

@@ -56,6 +56,7 @@ class Comment(MPTTModel):
         related_name="replies",
         on_delete=CASCADE,
     )
+    revision_count = models.PositiveIntegerField(default=1)
 
     versions = VersionRelation()
 
@@ -118,10 +119,6 @@ class Comment(MPTTModel):
         query = Comment.filter(parent=self)
         return len(query)
 
-    @cached_property
-    def get_revisions(self):
-        return self.versions.count()
-
     @cached_property
     def page_title(self):
         if isinstance(self.linked_object, Problem):