old_contents: from django.contrib import admin
  
  from .models import Comment
  
  
  admin.site.register(Comment)
  
new_contents: from django.contrib import admin
  
  from ..utils.admin import BaseModelAdmin
  from .models import Comment
  
  
  class CommentAdmin(BaseModelAdmin):
      list_display = ('__str__', 'created_by', 'content_type', 'content_object')
  
  admin.site.register(Comment, CommentAdmin)
  
subject: Add custom admin for Comments app