db/migrate/050_add_user_index_to_diary_comments.rb

   1 # frozen_string_literal: true
   2
   3 class AddUserIndexToDiaryComments < ActiveRecord::Migration[4.2]
   4   def self.up
   5     add_index :diary_comments, [:user_id, :created_at], :name => "diary_comment_user_id_created_at_index"
   6   end
   7
   8   def self.down
   9     remove_index :diary_comments, :name => "diary_comment_user_id_created_at_index"
  10   end
  11 end