Module: ActiveSupport::Rescuable::ClassMethods

Module | ActiveSupport::Rescuable::ClassMethods
In: | lib/active_support/rescuable.rb

### Methods

rescue_from

### Public Instance methods

rescue_from(*klasses, &block)

Rescue exceptions raised in controller actions.

`rescue_from` receives a series of exception classes or class names, and a trailing `:with` option with the name of a method or a Proc object to be called to handle them. Alternatively a block can be given.

Handlers that take one argument will be called with the exception, so that the exception can be inspected when dealing with it.

Handlers are inherited. They are searched from right to left, from bottom to top, and up the hierarchy. The handler of the first class for which `exception.is_a?(klass)` holds true is the one invoked, if any.

      class ApplicationController < ActionController::Base
        rescue_from User::NotAuthorized, :with => :deny_access # self defined exception
        rescue_from ActiveRecord::RecordInvalid, :with => :show_errors

        rescue_from 'MyAppError::Base' do |exception|
          render :xml => exception, :status => 500
        end

        protected
          def deny_access
            ...
          end

          def show_errors(exception)
            exception.record.new_record? ? ...
          end
      end

[Validate]