app/models/user.rb
class User < ActiveRecord::Base
attr_accessible :email, :first_name, :last_name, :role, :password, :password_confirmation
# Include default devise modules. Others available are:
# :token_authenticatable, :confirmable,
# :lockable, :timeoutable and :omniauthable
devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :trackable, :validatable,
:confirmable, :lockable, :timeoutable, :omniauthable
has_many :items
has_many :albums
has_many :collections
ROLES = %w[admin moderator member]
end