Rails - Jan 2006 - cache_sweeper causes undefined method error

I created a sweeper ItemSweeper and saved it in 
app/models/item_sweeper.rb. Then I put this in my item_controller.rb:

cache_sweeper :item_sweeper, :only => [:create, :destroy, :update]

But now when I call the view action, I get this error:

ActionView::TemplateError (undefined method `title'' for nil:NilClass)
on
line #5 of app/views/item/view.rhtml:
5:                      <H1 id="item_title"><%=h @item.title
%></H1>

It appears that @item isn''t getting retrieved for the view. If I
comment
out the cache_sweeper line, it works fine. My first guess is that 
perhaps the item sweeper isn''t getting loaded correctly - do I have its
file and class names correct? I don''t see anything in the log related
to
the sweeper.

Here''s the sweeper class:

class ItemSweeper < ActionController::Caching::Sweeper

  observe Item

  def after_create(item)
    expire_index item
  end

  def after_destroy(item)
    expire_index item
  end

  def after_update(item)
    expire_index item
  end

  private

  def expire_index(item)
    expire_fragment "#index_new_items_type#{item.type_id}"
  end

end

thanks for any help!
csn

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Posted via http://www.ruby-forum.com/.

Ack, turns out item_sweeper.rb got saved to the wrong directory. But 
shouldn''t Rails give a helpful error message that it couldn''t
load it?

csn

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Posted via http://www.ruby-forum.com/.