You can use
validates_uniqueness_of :email, :if => proc {|email| !email.blank? }Search for conditional validations for more info. 2011/7/22 Piter Fcbk <[email protected]> > I have a model with a non obligatory field that must be unique. The code > looks like this: > > class Person < ActiveRecord::Base > ... > validates :email, > :uniqueness => { :case_sensitive => false }, > :length => { :maximum => 128 }, > :email_format => true, > :allow_nil => true > ... > end > > When the form is submitted, if the email text field is empty, and empty > string is set as email to the Person object. The problem comes when trying > to create next person with no email since its storing "" instead of nil. > In order to solve this I want to store nil for the empty string (for this > field only). > > Should I do the check and set on the controller or in the model? I would go > for the model, but I'm open to suggestions. > In case its done in the model, should be done by overriding the attribute > setter or using a call back triggered by .save like before_save? > > Thanks for the help > > -- > You received this message because you are subscribed to the Google Groups > "Ruby on Rails: Talk" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/rubyonrails-talk?hl=en. > -- Fernando Almeida www.fernandoalmeida.net -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
