Mailer Fragment Caching

Use Rails fragment caching from within your mailers.

Very much a work in progress, I have only used tried it with Rails 4.0.0 and Ruby 2.

Installation

Add this line to your application's Gemfile:

gem 'mailer_fragment_caching'

And then execute:

$ bundle

Make sure you have caching enabled in your environment configuration:

config.action_controller.perform_caching = true

And configure your cache store as your please:

config.cache_store = :mem_cache_store

Include the module within your mailer file.

class CoolMailer

  include MailerFragmentCaching
  
  def cool_email
    ...
  end

end

Use cached fragments in your mailer templates, just like regular views.

<% cache @thing do %>
  <%= render @thing %>
<% end %>