Mongoose和async.parallel

Question

我想获得一个像下面这样的对象，所以我可以将它们传递给我的Dust.js模板。

{ officers: 
    [ { _id: '543dcbcf846c139cc042c813', name: 'Alpha' }, 
    { _id: '543dcc25846c139cc042c814', name: 'Beta' }, 
    { _id: '543dcd91846c139cc042c815', name: 'Gamma' } ], 
    branches: 
    [ { _id: '543dcbcf846c139cc042c813', name: 'Alpha' }, 
    { _id: '543dcc25846c139cc042c814', name: 'Beta' }, 
    { _id: '543dcd91846c139cc042c815', name: 'Gamma' } ] } 

这是我在控制器中的代码，以获取使用猫鼬的文档并将它们结合起来。我总是得到错误500，我的代码有什么问题吗？

var Officers = require('../../models/officers'); 
var Branches = require('../../models/branches'); 

router.get('/create', function (req, res) { 


    async.parallel({ 
    officers: function(cb){ 
     Officers.find({}, '_id name', cb); 
    }, 
    branches: function(cb){ 
     Branches.find({}, '_id name', cb); 
    } 
    }, function(err, results){ 
    res.render('companies/create', results); 
    }); 


}); 

Answer 1

上面的代码没有问题。原来我忘了在代码之前放这个var async = require('async');。

var Officers = require('../../models/officers'); 
var Branches = require('../../models/branches'); 
var async = require('async'); 

router.get('/create', function (req, res) { 
... 
...