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Clarify expire_action with namespaced controllers

This commit is contained in:
Eric Carty-Fickes 2012-05-11 11:12:32 -05:00
parent 1b956700ee
commit 1004ccc84b

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@ -229,6 +229,42 @@ class ProductsController < ActionController
end
</ruby>
Sometimes it is necessary to disambiguate the controller when you call +expire_action+, such as when there are two identically named controllers in separate namespaces:
<ruby>
class ProductsController < ActionController
caches_action :index
def index
@products = Product.all
end
end
module Admin
class ProductsController < ActionController
cache_sweeper :product_sweeper
def new
@product = Product.new
end
def create
@product = Product.create(params[:product])
end
end
end
class ProductSweeper < ActionController::Caching::Sweeper
observe Product
def after_create(product)
expire_action(:controller => '/products', :action => 'index')
end
end
</ruby>
Note the use of '/products' here rather than 'products'. If you wanted to expire an action cache for the +Admin::ProductsController+, you would use 'admin/products' instead.
h4. SQL Caching
Query caching is a Rails feature that caches the result set returned by each query so that if Rails encounters the same query again for that request, it will use the cached result set as opposed to running the query against the database again.