Rails setting OR conditions in validate_presence_of in a model?

Posted by Jty.tan on Stack Overflow See other posts from Stack Overflow or by Jty.tan
Published on 2010-06-03T02:14:54Z Indexed on 2010/06/03 2:24 UTC
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In a rails model, is it possible to do something like

class Example < ActiveRecord::Base
  #associations  

  validates_presence_of :item_id, (:user_id OR :user_email)

  #functions
end

Where the model has 3 columns of :item_id, :user_id, and :user_email? I want the model to be valid as long as I have a :user_id or a :user_email.

Idea being that if the item is recommended to a person who isn't currently signed up, it can be associated via email address for when the recommended person signs up.

Or is there a different method that I can use instead?

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