mongoose.js CastError：投射到数失败值“对象的对象]”在路径“未定义”

Question

使用Mongoose.js与node.js。

我有这样的模式：

var Photo = new Schema({ 
    URL:String 
    ,description:String 
    ,created_by:{type:ObjectId, ref:'User'} 
    ,created_at:{type:Date, default:Date.now()} 
}); 

var User = new Schema({ 
    name:{type:String,index:true} 
    ,email:{type:String,index:true, unique:true} 
}); 

//Task model                                              
var Task = new Schema({ 
    title:String 
    ,created_by:{type:ObjectId, ref: 'User'} 
    ,created:{type:Date, default:Date.now()} 
    ,responses:[{ 
     type:Number 
     ,user:{type:ObjectId, ref: 'User'} 
     ,comment:String 
     ,avatarURL:String 
     ,photo:{type:ObjectId, ref: 'Photo'} 
     ,created:{type:Date, default:Date.now()} 
    }] 
}); 

//Group model                                              
var Group = new Schema({ 
    name:String 
    ,tasks:[Task] 
}); 

这个代码中的错误了（组是好的，任务在那IDX是好的，反应是一个空数组，用户是有效的，照片是有效的）：

var typePhoto = 6; 
var resp = { 
     type: typePhoto//photo                                     
     ,user: user._id 
     ,photo: photo._id 
}; 


group.tasks[taskIdx].responses.push(resp); //errors out here 

在这一点上，我得到以下错误：

/home/admin/notitws/node_modules/mongoose/lib/utils.js:434 
     throw err; 
      ^
CastError: Cast to number failed for value "[object Object]" at path "undefined" 
    at SchemaNumber.cast (/home/admin/notitws/node_modules/mongoose/lib/schema/number.js:127:9) 
    at Array.MongooseArray._cast (/home/admin/notitws/node_modules/mongoose/lib/types/array.js:78:15) 
    at Object.map (native) 
    at Array.MongooseArray.push (/home/admin/notitws/node_modules/mongoose/lib/types/array.js:187:23) 
    at exports.taskAddPhoto (/home/admin/notitws/routes/group.js:1097:35) 
    at Promise.exports.createPhoto (/home/admin/notitws/routes/photos.js:106:4) 
    at Promise.addBack (/home/admin/notitws/node_modules/mongoose/lib/promise.js:128:8) 
    at Promise.EventEmitter.emit (events.js:96:17) 
    at Promise.emit (/home/admin/notitws/node_modules/mongoose/lib/promise.js:66:38) 
    at Promise.complete (/home/admin/notitws/node_modules/mongoose/lib/promise.js:77:20) 

就如何解决这一问题还是什么可能是（c）任何想法ausing它？

PS不知道它是否重要，但在呼吁让我组tasks.responses.user和tasks.responses.photo和tasks.created_by。

Answer 1

“类型”的关键字被用于由猫鼬，以确定该字段的类型。猫鼬大概认为反应是Number类型，而不是阵列。

尝试：

responses:[{ 
    type: {type: Number} 
    ,user:{type:ObjectId, ref: 'User'} 
    ,comment:String 
    ,avatarURL:String 
    ,photo:{type:ObjectId, ref: 'Photo'} 
    ,created:{type:Date, default:Date.now()} 
}] 

另一种方法是来包装响应对象变成一个模式，那么：

responses: [Response] 

Answer 2

我张贴什么固定我的铸造OBJECTID。这是我的功能文档updatedBy键的故事。我加了一些意见，告诉你有问题的区域对应的投放问题。

进口猫鼬;

var mongoose = require('mongoose'); 

define objectId;

var ObjectId = mongoose.Schema.Types.ObjectId; 

定义模式中的类型;

var featureSchema = new Schema({ 
     name: String, 
     isSystem: { type: Number, min: 0, max: 1 }, 
     updatedBy: {type:ObjectId, ref:'users'}, //here I defined the field! 
     updatedAt: { type: Date, default: Date.now } 
}); 

然后通过post方法插入文件;

app.post('/features', function (req, res){ 
      var feature; 
      console.log("POST: "); 
      console.log(req.body); 
      feature = new Feature({ 
        name: req.body.name, 
        isSystem: req.body.isSystem, 
        updatedBy: req.body.updatedBy, //here I insert the objectId field 
        updatedAt: new Date() 
      }); 
      feature.save(function (err) { 
        if (!err) { 
          return console.log("created"); 
        } else { 
         return console.log(err); 
        } 
      }); 
     return res.json({ features: feature }); 
    }); 

最后这是你的json字符串。你可以从谷歌铬的JavaScript控制台或类似的火它;

jQuery.post("/features", { 
       "name": "Receipt", 
       "isSystem": 0, 
       "updatedBy": "528f3d44afcb60d90a000001" 
    },function (data, textStatus, jqXHR) { 
       console.log("Post resposne:"); console.dir(data);     
       console.log(textStatus);        
       console.dir(jqXHR); 
    });