How to clear cache for a particular webpage in a Rails Application

Question

I have a Rails application running and there are several webpages and I am using default Rails caching. All the cache is stored in tmp/cache directory. I want to delete cache only for particular webpage and I want to do it on terminal something like rm -rf

Answer 1

rake tmp:cache:clear is your command.

You can also clear cache with Rails.cache.clear

Answer 2

If you are referring to clearing a fragment cache , one common pattern is to append a version string so that when you change the HTML of a view template, the cache for that template is busted. For example instead of:

<% cache do %>
  All available products:
  <% Product.all.each do |p| %>
    <%= link_to p.name, product_url(p) %>
  <% end %>
<% end %>

Do the following:

<% cache 'v1' do %>
  All available products:
  <% Product.all.each do |p| %>
    <%= link_to p.name, product_url(p) %>
  <% end %>
<% end %>

That way when you want to change the HTML inside of the cache block, you just change the string to 'v2'.