As per http://rails.rubyonrails.org/classes/ActiveRecord/Associations/ClassMethods.html
Possible callbacks are: before_add, after_add, before_remove and after_remove. Should any of the before_add callbacks throw an exception, the object does not get added to the collection. Same with the before_remove callbacks; if an exception is thrown the object doesnât get removed. However, when the add fails due to a before_add violation, the exception thrown just blows up the whole stack. It doesn't get caught and turned into a Validation error on the object. Is there a standard pattern for handling this? Thanks, -cpr -- 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.
