retest/db/migrate/20131009084203_create_gem_crafts.rb

class CreateGemCrafts < ActiveRecord::Migration
  def change
    create_table :gem_crafts do |t|
      t.string :name
      t.integer :price
      t.integer :books_type
      t.integer :books_qnt
      t.integer :previous_id
      t.integer :previous_qnt

      t.timestamps
    end
  end
end