Customizing validation errors

From my code snippets repo, found this snippet from here – it’s another way of adding your own error messages (or overriding the default ones Rails throws back).

class User < ActiveRecord::Base
attr_accessor :password_confirmation, :mail_confirmation

before_validation_on_create 'self.class.validates_uniqueness_of :name, :message=>“#{self.name} is not available”‘
before_validation_on_create ’self.class.validates_uniqueness_of :mail, :message=>”#{self.mail} is already used by some other user”‘

def validate_on_create
errors.add_on_blank %w( name password mail )
errors.add_on_boundary_breaking(’name’, 5..12) if errors.on(’name’).nil?
errors.add_on_boundary_breaking(’password’, 6..12) if errors.on(’password’).nil?
errors.add(’mail_confirmation’, “and mail do not match.”) unless mail_confirmation == mail
errors.add(’password_confirmation’, “and Password do not match.”) unless password_confirmation == password
end

end