Rails - Nov 2008 - Fragment caching not expiring the correct fragment cache

Hi,

I have a Product model. My app creates a fragment cache for
mysite.com/products, which triggers the index action (my app is
RESTful). Only admins can edit products, therefore, when adding a new
product, the mysite.com/products should expire.

But I have a problem: my products administration controller is in
admin/products_controller.rb, and therefore stupid Rails expires
admin/products fragment which is not correct.

Here is part of my code:

1) In the view:
--
<%- cache(:controller => ''products'', :action =>
''index'') do -%>
  <%- for product in @products -%>
...
--

2) In the admin/products_controller.rb:
--
cache_sweeper :product_sweeper, :only => [:create, :update, :destroy]
--

3) And my sweeper:
--
class ProductSweeper < ActionController::Caching::Sweeper
  observe Product

  def after_save(product)
    expire_cache(product)
  end

  def after_destroy(product)
    expire_cache(product)
  end

  def expire_cache(product)
    expire_fragment(:controller => ''products'', :action
=> ''index'')
  end
end
--


How to tell Rails to not be clever, and simply force him to expire
products fragment instead of admin/products?
-- 
Posted via http://www.ruby-forum.com/.

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Fernando Perez wrote:
> Hi,
> 
> I have a Product model. My app creates a fragment cache for
> mysite.com/products, which triggers the index action (my app is
> RESTful). Only admins can edit products, therefore, when adding a new
> product, the mysite.com/products should expire.
> 
> But I have a problem: my products administration controller is in
> admin/products_controller.rb, and therefore stupid Rails expires
> admin/products fragment which is not correct.
> 
> Here is part of my code:
> 
> 1) In the view:
> --
> <%- cache(:controller => ''products'', :action =>
''index'') do -%>
>   <%- for product in @products -%>
> ...
> --
> 
> 2) In the admin/products_controller.rb:
> --
> cache_sweeper :product_sweeper, :only => [:create, :update, :destroy]
> --
> 
> 3) And my sweeper:
> --
> class ProductSweeper < ActionController::Caching::Sweeper
>   observe Product
> 
>   def after_save(product)
>     expire_cache(product)
>   end
> 
>   def after_destroy(product)
>     expire_cache(product)
>   end
> 
>   def expire_cache(product)
>     expire_fragment(:controller => ''products'', :action
=> ''index'')
>   end
> end
> --
> 
> 
> How to tell Rails to not be clever, and simply force him to expire
> products fragment instead of admin/products?
Due to completely outdated information I have been reading on the 
internet, one should replace:

:controller => ''products'', :action =>
''index''

by

products_url

Now caching and expiring works correctly.
-- 
Posted via http://www.ruby-forum.com/.

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