rails_caching.md

http://guides.rubyonrails.org/caching_with_rails.html

Silence caching log

``ruby

confing/enviroment.rb

Rails.cache.silence!

# model caching solutions

### cache scenario: cache find(id)

```ruby
class Event < ActiveRecord::Base
  after_commit :flush_cache

  def self.cached_find(id)
    Rails.cache.fetch([name, id]) { find(id) }
  end

  def flush_cache
    Rails.cache.delete([self.class.name, id])
  end
end

e = Event.cached_find(2)
e.delete # this will flush cache

Fragment caching

  <% cache('all_available_products') do %>
    All available products:
  <% end %>

exipire this with

    expire_fragment('all_available_products')  # in controller

clear flush cache

Rails.cache.clear