NoMethodError when trying to validate model field

Hi, When validating a field in my user model, I wrote a method
“is_client?” to help with the validation. But I did it wrong because
now I’m getting this error:

NoMethodError in SessionController#create
undefined method is_client?' for User:Class RAILS_ROOT: ./script/../config/.. Application Trace | Framework Trace | Full Trace /usr/local/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/ active_record/base.rb:1238:inmethod_missing’
12:in `create’

Here’s the relevant code. Any ideas what I can do to get rid of this
error? Thanks, - Dave

class User < ActiveRecord::Base

validates_as_phone :work_phone, :if => !:work_phone.blank? &&
is_client?, :message => “is not a valid phone number” # line

attr_accessible :user_type_id, :user_group_id, :pharmacy_id, :phone,
:work_phone, :work_phone_extension, :fax, :bill_to_first_name,
:bill_to_last_name, :bill_to_street, :bill_to_city, :bill_to_state,
:bill_to_zip, :bill_to_country, :ship_to_first_name, :ship_to_last_name,
:ship_to_street, :ship_to_city, :ship_to_state, :ship_to_zip,
:ship_to_country, :bill_to_attn, :ship_to_attn, :bill_to_company,
:ship_to_company, :bill_to_street2, :ship_to_street2, :login, :email,
:password, :password_confirmation

def is_client?
user_type_id == 2


I can explain why you’re getting this error. validates_as_phone is a
method. All methods in Ruby have a receiver object. Because
validates_as_phone is called outside of a defined method, it’s
receiver object is the User class itself, not an object of type
User. The arguments that you pass to the validates_as_phone method
include a call to the is_client? method. Since the receiver object is
the User class, it looks for a method called is_client? defined for
the User class, which would look like this:

def User.is_client?
user_type_id == 2

or another way to say the same thing is:

def self.is_client?
user_type_id == 2

Instead, it finds a method defined for User objects:

def is_client?
user_type_id == 2

Unfortunately, you can’t just stick a self. onto your is_client?
method because user_type_id is a method that belongs to User objects,
not the User class itself.