Module: ActionController::Rescue::ClassMethods
- Defined in:
- lib/action_controller/rescue.rb
Instance Method Summary collapse
-
#process_with_exception(request, response, exception) ⇒ Object
:nodoc:.
-
#rescue_from(*klasses, &block) ⇒ Object
Rescue exceptions raised in controller actions.
Instance Method Details
#process_with_exception(request, response, exception) ⇒ Object
:nodoc:
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# File 'lib/action_controller/rescue.rb', line 54 def process_with_exception(request, response, exception) #:nodoc: new.process(request, response, :rescue_action, exception) end |
#rescue_from(*klasses, &block) ⇒ Object
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
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# File 'lib/action_controller/rescue.rb', line 90 def rescue_from(*klasses, &block) = klasses. unless .has_key?(:with) block_given? ? [:with] = block : raise(ArgumentError, "Need a handler. Supply an options hash that has a :with key as the last argument.") end klasses.each do |klass| key = if klass.is_a?(Class) && klass <= Exception klass.name elsif klass.is_a?(String) klass else raise(ArgumentError, "#{klass} is neither an Exception nor a String") end # Order is important, we put the pair at the end. When dealing with an # exception we will follow the documented order going from right to left. rescue_handlers << [key, [:with]] end end |