Nodejs Mongoose - TypeError：無效排序（）參數

Question

嗨我想運行我的程序，但是當我嘗試在我的瀏覽器中連接到本地主機時，我每次都收到以下錯誤。我認爲我的排序或查詢有問題，但我不確定它究竟發生了什麼問題。任何人都可以幫助修復我的代碼app.js代碼也是正確的，我覺得那裏可能有錯誤..？任何幫助歡迎！ :)

Express 
500 TypeError: Invalid sort() argument. Must be a string or object. 
at Query.sort (C:\nodeapps\nodeblox\node_modules\mongoose\lib\query.js:1167:11) 
at Function.Post.statics.getAll (C:\nodeapps\nodeblox\schemas\Post.js:44:9) 
at module.exports.app.post.username (C:\nodeapps\nodeblox\routes\index.js:45:10) 
at callbacks (C:\nodeapps\nodeblox\node_modules\express\lib\router\index.js:160:37) 
at param (C:\nodeapps\nodeblox\node_modules\express\lib\router\index.js:134:11) 
at pass (C:\nodeapps\nodeblox\node_modules\express\lib\router\index.js:141:5) 
at Router._dispatch (C:\nodeapps\nodeblox\node_modules\express\lib\router\index.js:169:5) 
at Object.router (C:\nodeapps\nodeblox\node_modules\express\lib\router\index.js:32:10) 
at next (C:\nodeapps\nodeblox\node_modules\express\node_modules\connect\lib\proto.js:190:15) 
at Object.methodOverride [as handle] (C:\nodeapps\nodeblox\node_modules\express\node_modules\connect\lib\middleware\methodOverride.js:37:5) 

這裏是我的2級架構，我認爲是造成問題

Post.js

'use strict'; 

var util = require('util'); 
var mongoose = require('mongoose'); 
var Schema = mongoose.Schema; 

var validatePresenceOf = function(value){ 
    return value && value.length; 
}; 

var toLower = function(string){ 
    return string.toLowerCase(); 
}; 

var getId = function(){ 
    return new Date().getTime(); 
}; 

/** 
    * The Post schema. we will use timestamp as the unique key for each post 
    */ 
var Post = new Schema({ 
    'key' : { 
    unique : true, 
    type : Number, 
    default: getId 
    }, 
    'subject' : { type : String, 
       validate : [validatePresenceOf, 'Subject is Required'] 
       }, 
    'content' : {type : String}, 
    'author': String, 
    'tags' : { 
      type : String, 
      set : toLower 
      } 
}); 

/** 
    * Get complete post details for all the posts 
    */ 
Post.statics.getAll = function(cb){ 
    var query = this.find({}); 
    query.sort('key', -1); 
    return query.exec(cb); 
}; 

/** 
    * Get only the meta information of all the posts. 
    */ 
Post.statics.getAllMeta = function(cb){ 
    return this.find({}, ['key','subject', 'author', 'tags'], cb); 
}; 

Post.statics.findByKey = function(key, cb){ 
    return this.find({'key' : key}, cb); 
}; 

module.exports = mongoose.model('Post', Post); 

user.js的

'use strict'; 

var util = require('util'); 
var bcrypt = require('bcrypt'); 
var mongoose = require('mongoose'); 
var Schema = mongoose.Schema; 

var validatePresenceOf = function(value){ 
    return value && value.length; 
}; 

var toLower = function(string){ 
    return string.toLowerCase(); 
}; 

var getId = function(){ 
    return new Date().getTime(); 
}; 

var User = new Schema({ 
    'key' : { 
    unique : true, 
    type : Number, 
    default: getId 
    }, 
    'username' : { type : String, 
       validate : [validatePresenceOf, 'a Username is required'], 
       set : toLower, 
       index : { unique : true } 
       }, 
    'password' : String, 
}); 

User.statics.findUser = function(username, cb){ 
    return this.find({'username' : username}, cb); 
}; 

User.statics.validateUser = function(username, password, cb){ 
    this.find({'username' : username}, function(err, response){ 
    var user = response[0]; 
    if(!user || response.length === 0){ 
     cb(new Error('AuthFailed : Username does not exist')); 
    }else{ 
     if(password == user.password){ 
     util.log('Authenticated User ' + username); 
     cb(null, user); 
     }else{ 
     cb(new Error('AuthFailed : Invalid Password')); 
     } 
    } 
    }); 
}; 

module.exports = mongoose.model('User' , User); 

最後我的應用程序。 js

'use strict' 

/** 
* Module dependencies. 
*/ 
var express = require('express'); 
var util = require('util'); 
var Logger = require('devnull'); 
var logger = new Logger({namespacing : 0}); 
var mongoose = require('mongoose'); 
var http = require('http'); 
var app = express(); 

mongoose.connect('mongodb://localhost/testdb'); 

/** 
    * Application Configuration 
    */ 
app.configure(function(){ 
    app.set('port', process.env.PORT || 3000); 
    app.set('views', __dirname + '/views'); 
    app.enable('jsonp callback'); 
    app.set('view engine', 'jade'); 
    app.set('view options', {layout : false}); 
    app.use(express.bodyParser()); 
    app.use(express.cookieParser()); 
    app.use(express.session({ 
    secret : 'devadotD'  
    })); 
    app.use(express.methodOverride()); 
    app.use(app.router); 
    app.use(express.static(__dirname + '/public')); 
    app.use(function(req, res, next){ 
    res.locals.session = req.session; 
    next(); 
    }); 
}); 

/** 
    * Application environment(s) Configuration 
    */ 
app.configure('development', function(){ 
    app.use(express.errorHandler({ dumpExceptions: true, showStack: true })); 
}); 

app.configure('stage', function(){ 
    app.use(express.errorHandler({ dumpExceptions: true, showStack: true })); 
}); 

app.configure('production', function(){ 
    app.use(express.errorHandler()); 
}); 

// Routes 
require('./routes')(app); 

http.createServer(app).listen(app.get('port'), function(){ 
    util.log("Express server listening on port " + app.get('port'), app.settings.env); 
    logger.log("Express server listening on port " + app.get('port'), app.settings.env); 
}); 

module.exports = app; 

Answer 1

您很可能會使用比您的代碼編寫的更新版本的貓鼬。該.sort()方法已經更新，現在需要的參數是這樣，按降序排序：

query.sort('-key');

或者您可以使用此版本：

query.sort({key: -1});

無論你使用，你已經過時了。請參閱latest docs。