title: How to stop object from saving without adding an error? ruby on rails question
body: <p>I have a custom validation. 
  I want that when the validation fails, it will stop the object from being saved.</p>
  
  <p>How can I do that without adding an error to the object (<code>error.add(:attribute)</code>)  ? </p>
  
  <p>Thanks, </p>
  
  <p>Oded</p>