my account and user model overview

gistfile1.txt

Account Model(account.rb):

class Account < ActiveRecord::Base
  has_many :projects, :dependent => :destroy
  has_many :users, :dependent => :destroy

  accepts_nested_attributes_for :users, :reject_if => :all_blank, :allow_destroy => true

  validates :subdomain, :presence => true, :uniqueness => true
  validates_exclusion_of :subdomain,
  :in => AppVariables::RESERVED_DOMAINS,
  :message => "has already been taken."
end
# == Schema Information
#
# Table name: accounts
#
#  id           :integer(4)      not null, primary key
#  company_name :string(255)
#  active       :boolean(1)
#  time_zone    :string(255)
#  subdomain    :string(255)
#  working_days :string(255)
#  created_at   :datetime
#  updated_at   :datetime

---------------------------------------------------------------------------------------------------------
User Model(user.rb):

class User < ActiveRecord::Base
  # Include default devise modules. Others available are:
  # :token_authenticatable, :encryptable, :confirmable, :lockable, :timeoutable and :omniauthable
  devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :trackable, :validatable, :encryptable

  # Setup accessible (or protected) attributes for your model
  attr_accessible :login, :first_name, :last_name, :username, :email, :password, :password_confirmation, :remember_me

  # Virtual attribute for authenticating by either username or email
  # This is in addition to a real persisted field like 'username'
  attr_accessor :login

  # relationships
  belongs_to :account
  has_many :projects_users
  has_many :projects, :through => :projects_users

  #validations
  validates_uniqueness_of :username, :scope => :account_id, :case_sensitive => false
  validates_uniqueness_of :email, :scope => :account_id, :case_sensitive => false

  protected
  def self.find_for_database_authentication(warden_conditions)
    conditions = warden_conditions.dup
    login = conditions.delete(:login)
    where(conditions).where(["lower(username) = :value OR lower(email) = :value", { :value => login.downcase }]).first
  end

end

# == Schema Information
#
# Table name: users
#
#  id                       :integer(4)      not null, primary key
#  account_id               :integer(4)      not null
#  first_name               :string(255)
#  last_name                :string(255)
#  address                  :string(255)
#  city                     :string(255)
#  type                     :string(255)
#  username                 :string(255)     not null
#  email                    :string(255)     not null
#  crypted_password         :string(255)     not null
#  password_salt            :string(255)     not null
#  persistence_token        :string(255)     not null
#  single_access_token      :string(255)     not null
#  perishable_token         :string(255)     not null
#  created_at               :datetime
#  updated_at               :datetime
#  avatar_file_name         :string(255)
#  avatar_content_type      :string(255)
#  avatar_file_size         :integer(4)
#  avatar_updated_at        :datetime
#  is_active                :boolean(1)      default(TRUE), not null
#  deliverable_notification :integer(4)      default(0)
#  adjustment_notification  :integer(4)      default(0)