app.rb

class App < ActiveRecord::Base
    attr_accessible :image, :name, :ram
    has_many :versions
    has_many :installations
    belongs_to :user
    validates_presence_of :name
    mount_uploader :image, ApplogoUploader

    def actual_version
      versions.actual
    end

    def self.aviable_for_user(user_id)
      user_apps = App.select("id").where(:user_id => user_id).map(&:id)
      with_versions = Version.where(:app_id => user_apps, :default => true)
    end

end