class AddIndicesToDependencyTable < ActiveRecord::Migration[5.2] def self.up add_index :dependencies, :successor_id add_index :dependencies, :predecessor_id add_index :projects, :state add_index :projects, [:user_id, :state] end def self.down remove_index :dependencies, :successor_id remove_index :dependencies, :predecessor_id remove_index :projects, :state remove_index :projects, [:user_id, :state] end end