class CreateFollows < ActiveRecord::Migration def change create_table :follows do |t| t.string :follower_type t.integer :follower_id t.string :followable_type t.integer :followable_id t.datetime :created_at end add_index :follows, ["follower_id", "follower_type"], :name => "fk_follows" add_index :follows, ["followable_id", "followable_type"], :name => "fk_followables" end end