Rails Cache Tags 
Tagged caching support within your Rails application. Tested against Rails 3.x and Rails 4.0. Dalli store is also supported!
Installation
Add this line to your application's Gemfile:
gem 'rails-cache-tags'
And then execute:
$ bundle
Or install it yourself as:
$ gem install rails-cache-tags
Usage
Anywhere:
cache = Rails.cache
cache.write "foo", "bar", :tags => %w(baz foo)
cache.read "foo" # => "bar"
cache.delete_tag "baz"
cache.read "foo" => nilMore realistic example:
class PostsController < ApplicationController
def index
@posts = cache.read("posts") || begin
posts_from_db = Post.all
cache.write "posts", posts_from_db, :tags => {:post => posts_from_db.map(&:id)}
posts_from_db
end
end
def show
id = params[:id]
@post = cache.fetch(["post", id], :tags => {:post => id}) do
Post.find(id)
end
end
def update
@post = Post.find(params[:id])
if @post.update_attributes
cache.delete_tag :post => @post.id
end
end
endIn your controller:
class PostController < ActionController::Base
def update
@post = Post.find_by_id(params[:id])
if @post.update_attributes(params)
expire_fragments_by_tags :post => @post.id
else
render :edit
end
end
endContributing
- Fork it
- Create your feature branch (
git checkout -b my-new-feature) - Commit your changes (
git commit -am 'Added some feature') - Write tests!
- Run tests against all major version of Rails starting from 3.0
- Push to the branch (
git push origin my-new-feature) - Create new Pull Request