class AddFollowsMigration < ActiveRecord::Migration
  def up
    create_table :follows do |t|
      t.references :followable, polymorphic: true
      t.references :follower, polymorphic: true

      t.timestamps
    end

    add_index :follows, ["follower_id", "follower_type"],     name: "fk_follows"
    add_index :follows, ["followable_id", "followable_type"], name: "fk_followables"
  end

  def down
    drop_table :follows
  end
end