将猫鼬文档转换为其他类似模型

Cast Mongoose Document to other similar Model

所以我的应用程序有以下布局:

  1. UserSchema(包含用户名和密码)

    var UserSchema = new mongoose.Schema({
    firstName: String,
    lastName: String,
    email: String,
    username: String,
    password: String
    }, options);
    UserSchema.plugin(passportLocalMongoose);
    
    module.exports = mongoose.model("User", UserSchema);
    
  2. 具有附加字段的 StudentSchema(用户上的鉴别器())

    var StudentSchema = new mongoose.Schema({
    indexNumber: String,
    courses: [{
        id: {
            type: mongoose.Schema.Types.ObjectId,
            ref: "Course"
        },
        entryDate: {
            type: Date, 
            default: Date.now
        }
    }]
    }, options);
    module.exports = User.discriminator("Student", StudentSchema);
    
  3. TeacherSchema(用户上的鉴别器())带有附加字段

    var TeacherSchema = new mongoose.Schema({
    degree: String,
    courses: [{
        type: mongoose.Schema.Types.ObjectId,
        ref: "Course"
    }]
    }, options);
    module.exports = User.discriminator("Teacher", TeacherSchema);
    

我正在使用通行证本地策略 User.register()。

router.post("/register", function(req,res) {
var newUser = new User({
    firstName: req.body.firstName,
    lastName: req.body.lastName,
    email: req.body.email,
    username: req.body.username
});
User.register(newUser, req.body.password, function(err, user) {
    if(err) throw err;
    passport.authenticate("local")(req, res, function() {
        req.flash("success", "Welcome " + user.username + ".");
        res.redirect("/");
    });
});
});

现在所有这些都在数据库中的同一个集合 users 下(因为鉴别器)

我如何在用户注册后,"promote"他给学生或老师,这样我就可以在他的对象中包含这些附加字段?

尝试在用户模型上使用 update 命令将 __t 设置为 "Teacher" 或 "Student"。我认为默认的鉴别器键是 __t 所以你需要这样的东西:

user.update({$set: {__t: "Student" } }, callback)`

然后你需要再次用鉴别器拉它来得到你的字段:

const Student = User.discriminator("Student", StudentSchema);
Student.findById(id, callback)