[{"_1":2,"_3":-5,"_4":-5},"loaderData",{"_5":6,"_7":8},"actionData","errors","root",{"_11":-5},"routes/user.$name.topics",{"_9":10,"_11":12,"_13":14,"_15":16,"_17":18,"_19":16},"topics",[35],"user",{"_20":21,"_13":14,"_22":23,"_24":25,"_26":27,"_28":29,"_30":16,"_31":32,"_33":34},"loginname","hpf1908","page",1,"limit",20,"total","id","43","avatar_url","http://www.gravatar.com/avatar/d9061868ef467a3d16a9c66c68ad395d?s=48","githubUsername","","create_at","2011-04-16 23:35:28","score",45,"topic_count","reply_count",8,"is_star",false,{"_20":36,"_37":21,"_38":-5,"_39":40,"_41":42,"_43":44,"_45":34,"_46":34,"_31":47,"_48":49,"_26":50,"_51":52},"388","author_id","tab","content","今天下午捣鼓了一下小应用，使用老赵的jscex给mongoose添加了Async 同步方法，感觉还不错，至少对我来说相当节省开发效率，分享一下。\r\n\r\n 给mongoose添加jscex的方法很简单，只需要使用老赵的 ”Jscex异步增强模块“进行异步操作绑定即可，什么是”Jscex异步增强模块“在此我就不缀述了，感兴趣的同学直接访问 Jscex异步增强模块即可。这里仅贴出mongoose的异步操作绑定代码，代码比较简单，就不一一说明了。\r\n\r\n先贴一个加载异步增强模块的代码，我事先用npm安装了jscex，命令如下” npm install jscex jscex-jit jscex-async”，详细请看赵姐夫的说明，链接地址：https://github.com/JeffreyZhao/jscex/blob/master/README-cn.md\r\n\r\n

\r\nvar Jscex = require(\"jscex\");\r\n\r\nrequire(\"jscex-jit\").init(Jscex);\r\nrequire(\"jscex-async\").init(Jscex);\r\nrequire(\"./jscex-async-powerpack\").init(Jscex);\r\n\r\nmodule.exports = Jscex;\r\n

\r\n\r\n有了jscex，剩下就是加语法糖的代码了，只需做个简单的绑定\r\n\r\n

\r\nvar mongoose = require('mongoose'),\r\n    Jscex = require('../plugins/jscex-start'),\r\n    Model = mongoose.Model;\r\n \r\nvar Async = Jscex.Async;\r\nvar Task = Async.Task;\r\nvar Jscexify = Async.Jscexify;\r\n \r\n//真坑爹，mardown居然有小于号就显示不正确\r\nvar addSugarMethods = function(methods , obj){\r\n    for(var i = 0,len = methods.length; i 小于 len ; i++){\r\n        if(obj[methods[i]])\r\n            obj[methods[i] + 'Async'] = Jscexify.fromStandard(obj[methods[i]]);\r\n    }\r\n}\r\n \r\nmodule.exports = {\r\n    init : function(){\r\n        addSugarMethods(['save','remove'],Model.prototype);\r\n    },\r\n    model : function(name ,schema){\r\n        mongoose.model(name, schema);\r\n        var methods = ['find','remove','findById','findOne','count','distinct','create','update'];\r\n        var model = mongoose.model(name);\r\n        addSugarMethods(methods,model);\r\n    }\r\n}\r\n\t\r\n

\r\n\r\n好了，下面以node-club源码里的User 对象做个例子测试一下\r\n\r\n

\r\nvar mongoose = require('mongoose');\r\nvar Schema = mongoose.Schema;\r\nvar modelAsync = require('./modelAsync');\r\n\t\r\nvar UserSchema = new Schema({\r\n\t//用户昵称\r\n\tname: { \r\n\t\ttype: String, \r\n\t\tindex: true \r\n\t},      \r\n\t//用户登录名称:唯一\r\n\tloginname: { \r\n\t\ttype: String \r\n\t},\r\n\t//登录密码\r\n\tpass: { \r\n\t\ttype: String \r\n\t},\r\n\t//邮箱\r\n\temail: { \r\n\t\ttype: String \r\n\t},\r\n\t//个人主页\r\n\turl: { \r\n\t\ttype: String \r\n\t},\r\n\t//住址\r\n\tlocation: { \r\n\t\ttype: String \r\n\t},\r\n\t//个性签名\r\n\tsignature: { \r\n\t\ttype: String \r\n\t},\r\n\t//个人简介\r\n\tprofile: { \r\n\t\ttype: String \r\n\t},\r\n\t//微薄\r\n\tweibo: { \r\n\t\ttype: String \r\n\t},\r\n\t//头像\r\n\tavatar: { \r\n\t\ttype: String \r\n\t},\r\n\t//被关注的人数\r\n\tfollower_count: { \r\n\t\ttype: Number, \r\n\t\tdefault: 0 \r\n\t},\r\n\t//关注的人数\r\n\tfollowing_count: { \r\n\t\ttype: Number, \r\n\t\tdefault: 0 \r\n\t},\r\n\t//创建时间\r\n\tcreate_at: { \r\n\t\ttype: Date, \r\n\t\tdefault: Date.now \r\n\t},\r\n\t//更新时间\r\n\tupdate_at: { \r\n\t\ttype: Date, \r\n\t\tdefault: Date.now \r\n\t},\r\n\t//是否活动状态\r\n\tactive: { \r\n\t\ttype: Boolean, \r\n\t\tdefault: true \r\n\t}\r\n});\r\n\r\nmodelAsync.model('User', UserSchema);\r\n

\r\n\r\n----------------------分割线----------------------------------\r\n\r\n

\r\nvar mongoose = require('mongoose'),\r\n    config= require('../config').config,\r\n    modelAsync = require('./modelAsync');\r\n \r\nmodelAsync.init();\r\n \r\nmongoose.connect(config.db, function(err){\r\n    if(err){\r\n        console.log('connect to db error: ' + err.message);\r\n        process.exit(1);\r\n    }\r\n});\r\n \r\n// models\r\nrequire('./user');\r\n \r\nexports.User = mongoose.model('User');\r\n

\r\n\r\n上面代码取自node-club里的源码，至此就可以用同步的写法去获取数据了，测试代码如下\r\n\r\n

\r\nvar models      = require('../../models'),\r\n    User = models.User,\r\n    should = require('should'),\r\n    Jscex = require('../../plugins/jscex-start');\r\n \r\nmodule.exports = {\r\n \r\n  'test updating documents async': function () {\r\n \r\n        var saveUserAsync = eval(Jscex.compile(\"async\", function (user) {\r\n            $await(user.saveAsync());\r\n            var _user = $await(User.findAsync({ _id : user._id }));\r\n            should.exist(_user);\r\n            _user.should.have.length(1);\r\n        }));\r\n \r\n        var user = new User();\r\n \r\n        user.name      = 'flyhuang';\r\n        user.loginname = 'hpf1908';\r\n        user.pass      = '123456';\r\n        user.email     = 'hpf1908[@gmail](/user/gmail).com';\r\n \r\n        var task = saveUserAsync(user);\r\n        task.start();\r\n    },\r\n    'test delete documents async' : function(){\r\n \r\n        var removeUserAsync = eval(Jscex.compile(\"async\", function (user) {\r\n            $await(user.saveAsync());\r\n            $await(User.removeAsync({ name : user.name }));\r\n            var _user = $await(User.findAsync({ name : user.name }));\r\n            _user.should.be.empty;\r\n        }));\r\n \r\n        var user = new User();\r\n \r\n        user.name      = 'flyhuang';\r\n        user.loginname = 'hpf1908';\r\n        user.pass      = '123456';\r\n        user.email     = 'hpf1908[@gmail](/user/gmail).com';\r\n \r\n        var task = removeUserAsync(user);\r\n        task.start();\r\n    }\r\n}\r\n

\r\n\r\n看上面的例子是否觉得同步写法更简明易懂了？当然如果你不喜欢这样的写法也可以继续使用异步的方式，再贴一个用异步写法的例子，以作对比\r\n\r\n

\r\nvar models      = require('../../models'),\r\n    User = models.User,\r\n    should = require('should');\r\n \r\nmodule.exports = {\r\n \r\n  'test updating documents': function () {\r\n \r\n        var user = new User();\r\n \r\n        user.name      = 'flyhuang';\r\n        user.loginname = 'hpf1908';\r\n        user.pass      = '123456';\r\n        user.email     = 'hpf1908[@gmail](/user/gmail).com';\r\n \r\n        user.save(function (err) {\r\n            should.strictEqual(err, null);\r\n            User.find({ _id : user._id },function(err , user){\r\n                should.strictEqual(err, null);\r\n                should.exist(user);\r\n                user.should.have.length(1);\r\n \r\n                console.log('done');\r\n            });\r\n        });\r\n    },\r\n    'test delete documents' : function(){\r\n        var user = new User();\r\n \r\n        user.name      = 'flyhuang';\r\n        user.loginname = 'hpf1908';\r\n        user.pass      = '123456';\r\n        user.email     = 'hpf1908[@gmail](/user/gmail).com';\r\n \r\n        user.save(function (err) {\r\n            should.strictEqual(err, null);\r\n            User.remove({ name : 'flyhuang' },function(err ){\r\n                should.strictEqual(err, null);\r\n                User.find({ name : 'flyhuang'},function(err , user){\r\n                    should.strictEqual(err, null);\r\n                    user.should.be.empty;\r\n                    console.log('done');\r\n                });\r\n            });\r\n        });\r\n    }\r\n}\r\n

\r\n\r\n\r\n\r\n\t\r\n","title","轻松给mongoose添加jscex的语法糖","last_reply_at","2012-03-05 07:35:06.843","good","top",9,"visit_count",7738,"2012-03-04 15:27:10.954","author",{"_13":14,"_22":23}]