Cache sweeping and render_component (my mistake or Rails bug?)

rubyonrails-talk
1

Hi

I'm working on a program which relies on heavy cache sweeper usage. I've just bumped onto an odd problem. When using render_component method in layouts or templates with cache sweeping turned on, Rails throws an exception with the following message:

NoMethodError in TestController#index

You have a nil object when you didn't expect it! The error occured while evaluating nil.controller_name

where TestController is obviously my controller class name. I'm running Rails 1.1.6 on linux box. My test app which extracts the error consists of a controller which body is only:

require 'sweeper' class TestController < ApplicationController cache_sweeper :sweeper

  def index   end

  def foo     render :text => "foo"   end end

The file sweeper.rb contains my sweeper class definition: class Sweeper < ActionController::Caching::Sweeper   observe Bar end Bar is an empty model, with a table bars containing only id field. I've turned the caching on by setting config.action_controller.perform_caching = true in config/development/environment.rb file.

Exception is thrown in actionpack-1.12.5/lib/action_controller/caching.rb file in line 541. Am I doing something wrong or it's some kind of a Rails bug?

2

Andrzej, have you found the solution to this? I'm facing similar issue.

Yes, I got rid of render_component. Unfortunately that's probably not the kind of answer you'd like to see. Component caching was broken in Rails 1.1.6 and I haven't checked it's behavior in later versions. Should you come up with a means of fixing the problem in question, please let me know;)

regards Andrzej Zawadzki