## 问题 你想与MongoDB数据库进行交互。 ## Solution ## 方法 ### 使用Node.js ### 安装 * 如果你的电脑中还没有的话请先[安装MongoDB](http://www.mongodb.org/display/DOCS/Quickstart) 。 * [安装MongoDB原生的模块](https://github.com/christkv/node-mongodb-native)。 #### 保存记录 ~~~ mongo = require 'mongodb' server = new mongo.Server "127.0.0.1", 27017, {} client = new mongo.Db 'test', server # save() updates existing records or inserts new ones as needed exampleSave = (dbErr, collection) -> console.log "Unable to access database: #{dbErr}" if dbErr collection.save { _id: "my_favorite_latte", flavor: "honeysuckle" }, (err, docs) -> console.log "Unable to save record: #{err}" if err client.close() client.open (err, database) -> client.collection 'coffeescript_example', exampleSave ~~~ #### 查找记录 ~~~ mongo = require 'mongodb' server = new mongo.Server "127.0.0.1", 27017, {} client = new mongo.Db 'test', server exampleFind = (dbErr, collection) -> console.log "Unable to access database: #{dbErr}" if dbErr collection.find({ _id: "my_favorite_latte" }).nextObject (err, result) -> if err console.log "Unable to find record: #{err}" else console.log result # => { id: "my_favorite_latte", flavor: "honeysuckle" } client.close() client.open (err, database) -> client.collection 'coffeescript_example', exampleFind ~~~ ### 浏览器端 一个[基于REST的接口](https://github.com/tdegrunt/mongodb-rest)为此而生。它提供了基于AJAX的访问方式。 ## 讨论 本菜谱把_save_和_find_分成了两个示例，目的是为了把MongoDB独有的链接任务和回调管理方面的担忧分离。[async](https://github.com/caolan/async)模块可以帮上忙。