I would understand if there was some level of customization involved that distinguishes it from the super class:
class DoubleRenderError < Error DEFAULT_MESSAGE = "Render and/or redirect were called multiple times in this action. Please note that you may only call render OR redirect, and at most once per action. Also note that neither redirect nor render terminate execution of the action, so if you want to exit an action after redirecting, you need to do something like \"redirect_to(...) and return\"." def initialize(message = nil) super(message || DEFAULT_MESSAGE) end end But in the exampels I provided in the initial post that was not the case. ActionNotFound, for example, had no implementation of its own. It seems to be a waste of memory allocation. On Sep 16, 2:57 pm, John Merlino <stoici...@aol.com> wrote: > I often see custom Exception classes inheriting from StandardError. > Errors which you can generally deal with are subclassed from > StandardError: > > module AbstractController > class Error < StandardError #:nodoc: > end > > class ActionNotFound < StandardError #:nodoc: > end > > unless action_name = method_for_action(action_name) > raise ActionNotFound, "The action '#{action}' could not be found for > #{self.class.name}" > end > > But why even bother to create the subclasses (which as shown above, > have no definition of themselves), when substituting ActionNotFound > with StandardError during the raise call will have the same effect. -- 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 rubyonrails-talk@googlegroups.com. To unsubscribe from this group, send email to rubyonrails-talk+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.