class CreateUserAccesses < ActiveRecord::Migration[4.2] def self.up create_table :user_accesses do |t| t.integer :user_id t.integer :supplier_id t.timestamps end add_index :user_accesses, :user_id add_index :user_accesses, :supplier_id add_index :user_accesses, [:user_id, :supplier_id] end def self.down drop_table :user_accesses end end