Node.js ORM框架：bookshelf
cw63
8年前
一个基于Knex.js的Node.js ORM框架，支持PostgreSQL，MySQL和SQLite3
简单来说，Bookself是一个优秀的代码库，它易于阅读、理解、可扩展。它不强制你使用任何特定的校验scheme，而是提供灵活有效的关系或嵌套关系加载策略，一级类支持事务。它是一个精益的对象关系映射器（lean Object Relation Mapper），允许你使用原始的knex接口，当你需要自定义查询时，因为它有时并不能完全满足老一套的惯例。
Bookshelf遵从和Backbone.js一样棒的Models和Collections思想，使用相同的模式、命名惯例和哲学构建轻量、易于操控的ORM。如果你已经了解Backbone，你就知道如何使用Bookshelf.
插件
- Registry: Register models in a central location so that you can refer to them using a string in relations instead of having to require it every time. Helps deal with the challenges of circular module dependencies in Node.
- Virtuals: Define virtual properties on your model to compute new values.
- Visibility: Specify a whitelist/blacklist of model attributes when serialized toJSON.
支持
Have questions about the library? Come join us in the #bookshelf freenode IRC channel for support on knex.js and bookshelf.js, or post an issue on Stack Overflow or in the GitHub issue tracker.
示例：
var knex = require('knex')({client: 'mysql', connection: process.env.MYSQL_DATABASE_CONNECTION }); var bookshelf = require('bookshelf')(knex); var User = bookshelf.Model.extend({ tableName: 'users', messages: function() { return this.hasMany(Posts); } }); var Posts = bookshelf.Model.extend({ tableName: 'messages', tags: function() { return this.belongsToMany(Tag); } }); var Tag = bookshelf.Model.extend({ tableName: 'tags' }) User.where('id', 1).fetch({withRelated: ['posts.tags']}).then(function(user) { console.log(user.related('posts').toJSON()); }).catch(function(err) { console.error(err); });