class CreateOptimizedImages < ActiveRecord::Migration def up create_table :optimized_images do |t| t.string :sha, null: false t.string :ext, null: false t.integer :width, null: false t.integer :height, null: false t.integer :upload_id, null: false end add_index :optimized_images, :upload_id end def down drop_table :optimized_images end end