rails 4缓存过期无效

时间:2016-03-31 20:29:29

标签: ruby-on-rails caching fragment-caching

在我的rails应用程序中,我尝试使用嵌套缓存,但是当user.profile.full_name更改时,我的缓存键未到期。因此,当用户更改其姓名时,_profile_product.html.erb显示的full_name仍为旧名称。

我该如何更改密钥?

简档/ show.html.erb

<% cache(@profile) do %> #this is the profile info and the cache key expires properly when @profile.full_name changes
  <%= @profile.full_name %>
  .....
<% end %>
<% if @profile.user.products.any? %> #not nested in the previous cache; 
  #products belonging to the profile are listed with this code under the profile info
  <%= render 'products/profile_products' %>
<% end %>

_profile_products.html.erb

<% cache(['profile-products', @profile_products.map(&:id), @profile_products.map(&:updated_at).max]) do %>
  <%= render partial: "products/profile_product", collection: @profile_products, as: :product %>
<% end %>

_profile_product.html.erb

<% cache (['profile-product-single', product, product.user.profile]) do %>
  <%= product.name %>
  <%= product.user.profile.full_name %> #if I change profile name this one won't change thanks to the cache
<% end %>

1 个答案:

答案 0 :(得分:1)

尝试更改

中的缓存键

_profile_products.html.erb

<% cache(['profile-products', @profile_products.map(&:id), @profile_products.map(&:updated_at).max, @profile_products.map{|pp| pp.user.profile.updated_at.to_i }.max]) do %>
  <%= render partial: "products/profile_product", collection: @profile_products, as: :product %>
<% end %>

问题是,当用户更新其个人资料名称时,包含整个列表的缓存片段不会过期。

通过将关联的用户配置文件updated_at的最大值添加到缓存键,缓存片段将在用户更新其配置文件时到期。