#This model is user.rb

class User < ActiveRecord::Base
 #Max & min lengths for all fields
 SCREEN_NAME_MIN_LENGTH = 4
 SCREEN_NAME_MAX_LENGTH = 20
 PASSWORD_MIN_LENGTH = 4
 PASSWORD_MAX_LENGTH = 40
 EMAIL_MAX_LENGTH = 50
 SCREEN_NAME_RANGE = SCREEN_NAME_MIN_LENGTH..SCREEN_NAME_MAX_LENGTH
 PASSWORD_RANGE = PASSWORD_MIN_LENGTH..PASSWORD_MAX_LENGTH

 validates_uniqueness_of :screen_name, :email
 validates_length_of :screen_name, :within => SCREEN_NAME_RANGE
 validates_length_of :password, :within => PASSWORD_RANGE
 validates_length_of :email, :maximum => EMAIL_MAX_LENGTH


 validates_format_of :screen_name,
                     :with => /ˆ[A-Z0-9_]*$/i,
                     :message => "must contain only letters, " + "numbers, and unscores"

 validates_format_of :email,
                     :with => /ˆ[A-Z0-9._%-]+@([A-Z0-9-]+\.)+[A-Z]{2,4}$/i,
                     :message => "must be a valid email address"
 end



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I cant user.save in the console as you can see below. I want to know where the mistake is.

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Shanes-iMac:~/rubydev/rails_space shanekillian$ script/console
Loading development environment.
>> user = User.new(:screen_name => "rails_rocks",
?> :email => "rails@example.com",
?> :password => "foobar")
=> #<User:0x356ed7c @new_record=true, @attributes={"screen_name"=>"rails_rocks", "password"=>"foobar", "email"=>"rails@example.com"}>
>> user.save
=> false
>> user.errors.full_messages
=> ["Screen name must contain only letters, numbers, and unscores", "Email must be a valid email address"]
>>