在Ruby把MySQL做NoSQL用 Friendly简介
Friendly是一个github上的一个插件，起源是因为FriendFeed把MySQL做NoSQL的用，具体参见这篇：http://bret.appspot.com/entry/how-friendfeed-uses-mysql
Friendly就是这样的作用，把MySQL变成一个文件数据库来用。NoSQL日趋狂热，schemaless是其中一个原因。客户端的改变可以将MySQL达到同样目的。下面是简单的介绍：
安装friendly
sudo gem install friendly
在Rails里
#environment.rb: config.gem "friendly"
#and create a config/friendly.yml:development::adapter:"mysql":host: "localhost":user: "root":password: "swordfish":database: "friendly_development"
没有使用Rails:
Friendly.configure :adapter=> "mysql", :host => "localhost", :user => "root", :password => "swordfish", :database => "playing_with_friendly"
创建Model
class BlogPostinclude Friendly::Document attribute :author, Stringattribute :title,Stringattribute :body, Stringend
创建Table
#script/console:Friendly.create_tables!
索引
class BlogPostinclude Friendly::Document attribute :author, Stringattribute :title,Stringattribute :body, String indexes :authorindexes :created_atend
#Run create_tables again and the index tables will be created for you.Friendly.create_tables!
创建Objects
#With familiar ActiveRecord syntax:BlogPost.create :author => "James Golick", :title=> "Friendly has familiar syntax.", :body => "So, there's very little learning curve."
查询
BlogPost.all(:author => "James Golick")
#Most recent posts:BlogPost.all(:order! => :created_at.desc)
缓存
#Install the memcached gem:sudo gem install memcached#配置 Friendly:Friendly.cache = Friendly::Memcached.new(Memcached.new)#Configure your model to cache:class BlogPostinclude Friendly::Document attribute :author, Stringattribute :title,Stringattribute :body, String indexes :authorindexes :created_at caches_by :idend
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