9

我正在尝试使用 node.js、mongoose 和骨干创建一个 todo 应用程序以用于学习目的。到目前为止，我定义了这些模型：

var TaskSchema = new mongoose.Schema({
    title: { type:String },
    content: { type:String } ,
    created: {type:Date, 'default':Date.now},
    due: {type:Date},
    accountId: {type:mongoose.Schema.ObjectId}
});

var Task = mongoose.model('Task',TaskSchema);

var AccountSchema = new mongoose.Schema({
    email: { type:String, unique: true},
    password: { type:String } ,
    name: { first: {type:String}, 
        last: { type:String } },
    birthday: {
        day: {type:Number, min:1, max:31, required:false},
        month: {type:Number, min:1, max:12, required:false},
        year: {type:Number}

    },
    photoUrl: {type:String},
    biography:{type:String},
    tasks:[Task]
});

var Account = mongoose.model('Account',AccountSchema);

此外，我还有以下添加任务的方法：

var enter_new_task = function(options,callback){
    var title = options.title;
    var content = options.content;
    var due = options.due;
    var account = options.account;
    var task = new Task({
        title: title,
        content: content,
        due: due,
        accountId: account._id
    });
    account.tasks.push(task);
    account.save(function(err) {
        if ( err ) {
            console.log("Error while saving task: " + err);
        }else{
            callback();
        }
    })
}

但是，当我确实添加了一项任务时，我收到一条错误消息：

“对象 {} 没有方法 'cast'”

使用以下堆栈跟踪：

   at Array.MongooseArray._cast (/home/lior/workspace/todo_express/node_modules/mongoose/lib/types/array.js:107:30)
    at Object.map (native)
    at Array.MongooseArray.push (/home/lior/workspace/todo_express/node_modules/mongoose/lib/types/array.js:261:23)
    at Object.enter_new_task (/home/lior/workspace/todo_express/models/Account.js:107:17)
    at /home/lior/workspace/todo_express/app.js:104:18
    at Promise.<anonymous> (/home/lior/workspace/todo_express/models/Account.js:41:4)
    at Promise.<anonymous> (/home/lior/workspace/todo_express/node_modules/mongoose/node_modules/mpromise/lib/promise.js:162:8)
    at Promise.EventEmitter.emit (events.js:95:17)
    at Promise.emit (/home/lior/workspace/todo_express/node_modules/mongoose/node_modules/mpromise/lib/promise.js:79:38)
    at Promise.fulfill (/home/lior/workspace/todo_express/node_modules/mongoose/node_modules/mpromise/lib/promise.js:92:20)
9

似乎问题在于新任务到任务数组的行。

在谷歌或堆栈上找不到任何东西，所以我想知道，有没有人知道出了什么问题？

谢谢！

4

2 回答 2

24

错误在 AccountSchema 定义中。子文档类型应该是模式，而不是模型。

var AccountSchema = new mongoose.Schema({
    //...
    tasks:[TaskSchema]
});
于 2013-04-09T09:47:15.203 回答
2

或者，如果您不能直接访问您的架构，而只能访问模型，您可以使用点符号访问模型的架构，如下所示：

var AccountSchema = new mongoose.Schema({
    //...
    tasks:[Task.schema]
});

如果您在另一个文件中定义了架构并且正在使用如下内容，这将很有帮助：

module.exports = mongoose.model('Task', TaskSchema);
于 2015-05-05T20:42:50.773 回答