ActiveRecord.jsJavaScript 对象映射框架

ActiveRecord.js 是一个开源的JavaScript 对象映射框架，包括：

• Google Gears (client-side persistence)
• In Memory (if no SQL server is available on the client)
• Adobe AIR (client-side persistence)
• SQLite and MySQL (via Aptana Jaxer, the open source Ajax server)
• additional environments (like HTML5) expected to come through working with the community on the project

ActiveRecord.js abstracts away underlying SQL commands so that JavaScript developers can have a unified API for storing, finding, selecting and retrieving objects and their data using the ActiveRecord pattern popularized by the Ruby on Rails community.

示例代码：

1. var User = ActiveRecord.define('users',{  
2.     username: '',  
3.     email: ''  
4. });  
5. User.hasMany('articles');  
6.   
7. var ryan = User.create({  
8.     username: 'ryan',  
9.     email: 'rjohnson@aptana.com'  
10. });  
11.   
12. var Article = ActiveRecord.define('articles',{  
13.     name: '',  
14.     body: '',  
15.     user_id: 0  
16. });  
17. Article.belongsTo('user');  
18.   
19. var a = Article.create({  
20.     name: 'Announcing ActiveRecord.js',  
21.     user_id: ryan.id  
22. });  
23. a.set('name','Announcing ActiveRecord.js!!!');  
24. a.save();  
25.   
26. a.getUser() == ryan;  
27. ryan.getArticleList()[0] == a;