migration for cheers database

cheers db config.batch

rails g scaffold beer name description:text image:attachment family_id:integer style_id:integer alcohol:integer country_id:integer state brewery_id rating:integer --skip-stylesheets
rails g scaffold brewery name description:text image:attachment --skip-stylesheets
rails g scaffold store name description:text image:attachment phone:integer address:text location_id:integer twitter facebook foursquare instagram --skip-stylesheets
rails g scaffold family name description:text image:attachment --skip-stylesheets
rails g scaffold style name description:text image:attachment --skip-stylesheets
rails g scaffold tag name description:text --skip-stylesheets
rails g scaffold location name code:integer --skip-stylesheets
rails g scaffold storetype name description:text --skip-stylesheets
rails g scaffold price beer_id:integer store_id:integer price:decimal{4,2} --skip-stylesheets

rails g migration CreateStoresStoreTypesJoinTable

class CreateStoresStoreTypesJoinTable < ActiveRecord::Migration
  def self.up
    create_table :stores_store_types, :id => false do |t|
      t.integer :store_id
      t.integer :store_type_id
    end
 
    add_index :stores_store_types, [:store_id, :store_type_id]
  end
 
  def self.down
    drop_table :stores_store_types
  end
end