ruby-on-rails - Rails 缓存清扫器

Question

我正在尝试实现一个缓存清扫器，它将过滤特定的 Controller 操作。

class ProductsController < ActionController  
    caches_action :index  
    cache_sweeper :product_sweeper  

    def index 
        @products = Product.all 
    end 

    def update_some_state
      #... do some stuff which doesn't trigger a product save, but invalidates cache
    end
end 

扫地机类:

class ProductSweeper < ActionController::Caching::Sweeper
    observe Product

    #expire fragment after model update
    def after_save
       expire_fragment('all_available_products')   
    end

    #expire different cache after controller method modifying state is called.
    def after_update_some_state
        expire_action(:controller => 'products', :action => 'index') 
    end
end

ActiveRecord 回调 'after_save' 将正常工作，但 Controller 操作 'after_update_some_state' 上的回调似乎从未被调用。

Answer 1

看起来我只是在尝试让 Controller 操作的回调工作时缺少 Controller 名称。我的扫地机应该是:

class ProductSweeper < ActionController::Caching::Sweeper
    observe Product

    #expire fragment after model update
    def after_save
       expire_fragment('all_available_products')   
    end

    #expire different cache after controller method modifying state is called.
    def after_products_update_some_state
        expire_action(:controller => 'products', :action => 'index') 
    end

    #can also use before:
    def before_products_update_some_state
        #do something before. 
    end
end