Question

你好，我是猫鼬的新手，我正试图重新创建将轮班分配给一个人的情况。我已经创建了模式

    var shiftSchema = new mongoose.Schema({
    date: Date,
    location: String,
    job: String,
    event: String,
    calltime: Number,
    hours: Number
});

var Shift = mongoose.model("Shift", shiftSchema);

var memberSchema = new mongoose.Schema({
    id: Number,
    secondaryid: Number,
    firstname: String,
    lastname: String,
    profile: String,
    active: Boolean,
    shifts: [{
        type: mongoose.Schema.Types.ObjectId,
        ref: "Shift"
    }]
});

var Member = mongoose.model("Member", memberSchema);

创建了两个成员，每个成员都被推了一个班。

//Members in DB
{ "_id" : ObjectId("5bb14deb574f2b0d627c7ae2"), "shifts" : [ ObjectId("5bb14deb574f2b0d627c7ae3") ], "id" : 1000001, "secondaryid" : 20000001, "firstname" : "Jane", "lastname" : "Doe", "profile" : "Admin", "active" : true, "__v" : 1 }
{ "_id" : ObjectId("5bb14e13f445e50d7ba0257d"), "shifts" : [ ObjectId("5bb14e9f19e7670d91478323") ], "id" : 1000000, "secondaryid" : 20000000, "firstname" : "John", "lastname" : "Doe", "profile" : "Admin", "active" : true, "__v" : 1 }

//Shifts in DB
{ "_id" : ObjectId("5bb14deb574f2b0d627c7ae3"), "date" : ISODate("1970-01-01T00:00:00Z"), "location" : "Office2", "job" : "Clerk2", "event" : "", "calltime" : 7, "hours" : 7, "__v" : 0 }
{ "_id" : ObjectId("5bb14e9f19e7670d91478323"), "date" : ISODate("1970-01-01T00:00:00Z"), "location" : "Office", "job" : "Clerk", "event" : "", "calltime" : 8, "hours" : 8, "__v" : 0 }

问题是，当我运行以下命令

Member.find({}).populate('shifts').exec(function(err, allMembers){
    if(err){
        console.log(err)
    } else {
        console.log(allMembers)
    }
})

我从数据库得到响应，但“班次”中有空对象

[ { shifts: [ [Object] ],
    _id: 5bb14deb574f2b0d627c7ae2,
    id: 1000001,
    secondaryid: 20000001,
    firstname: 'Jane',
    lastname: 'Doe',
    profile: 'Admin',
    active: true,
    __v: 1 },
  { shifts: [ [Object] ],
    _id: 5bb14e13f445e50d7ba0257d,
    id: 1000000,
    secondaryid: 20000000,
    firstname: 'John',
    lastname: 'Doe',
    profile: 'Admin',
    active: true,
    __v: 1 } ]

我在做什么错？还是我需要遍历每个变量并分别填充？

Answer 1

那是一个误会。如果您记录一棵更大的树，console.log不会显示整个树，因为这会令人不知所措，但是只会显示三个嵌套对象深，因此下面的js对象：

 { a: { b: { c: { d: { e: 1 } } } }

显示为：

 { a: { b: { c: [Object] } } }

所以实际上对象不是空的，只是没有显示。

猫鼬在填充所有对象时返回空对象？

1 个答案: