Change comments ordering

apps/course/models.py

@@ -134,8 +134,11 @@ class Comment(MPTTModel):
     def __str__(self):
         return self.content
 
+    class Meta:
+        ordering = ('-created_at',)
+
     class MPTTMeta:
-        order_insertion_by = ['created_at']
+        order_insertion_by = ['-created_at']
         abstract = True
 
 
@@ -143,7 +146,7 @@ class CourseComment(Comment):
     parent = TreeForeignKey('self', null=True, blank=True, related_name='children', db_index=True, on_delete=models.PROTECT)
     course = models.ForeignKey(Course, on_delete=models.CASCADE, related_name='comments')
 
-    class Meta:
+    class Meta(Comment.Meta):
         verbose_name = 'Комментарий курса'
         verbose_name_plural = 'Комментарии курсов'
 
@@ -152,6 +155,6 @@ class LessonComment(Comment):
     parent = TreeForeignKey('self', null=True, blank=True, related_name='children', db_index=True, on_delete=models.PROTECT)
     lesson = models.ForeignKey(Lesson, on_delete=models.CASCADE, related_name='comments')
 
-    class Meta:
+    class Meta(Comment.Meta):
         verbose_name = 'Комментарий урока'
         verbose_name_plural = 'Комментарии уроков'