node.js - 如何在 Mongoose 中推送数组

Question

我想通过将数组推送到文档来更新数据，但是我在 res.send(err) 中遇到错误，这是我的代码:

    router.put('/update/:id', passport.authenticate('jwt', {session:false}), (req, res, next)=>{
    User.findById(req.params.id, function(err, user) {
        if(err) {
            console.log(err);
            return res.status(500).send({message: "Error"});
        }
        if(!user) {
            return res.status(404).send({message: "User Not Found"});            
        }
        Company.findById(req.body.company, function(err, company) {
            var students = [req.params.id];
            company.students = students.push(req.params.id);
            // res.send(students);
            company.save(function(err, company){
            if(err){
                return res.send(err);
                // return res.status(500).send({message: "Cannot Update Company, please try again"});
            }
                return res.status(200).send({message: "Update User To Company Success.", company});
            });
        });
    });
});

这里是 return res.send(err) 之后的错误详情； :

{
    "errors": {
        "students": {
            "message": "Cast to ObjectID failed for value \"2\" at path \"students\"",
            "name": "CastError",
            "stringValue": "\"2\"",
            "kind": "ObjectID",
            "value": 2,
            "path": "students",
            "reason": {
                "message": "Cast to ObjectId failed for value \"2\" at path \"students\"",
                "name": "CastError",
                "stringValue": "\"2\"",
                "kind": "ObjectId",
                "value": 2,
                "path": "students"
            }
        }
    },
    "_message": "Company validation failed",
    "message": "Company validation failed: students: Cast to ObjectID failed for value \"2\" at path \"students\"",
    "name": "ValidationError"
}

更新，这是我的架构，我想将 UserSchema 中的 id 用户添加到 CompanySchema 中的学生:

const CompanySchema = mongoose.Schema({
    nama:{
        type    : String,
        require : true
    },
    alamat:{
        type    : String,
        require : true
    },
    email:{
        type    : String,
        require : true
    },
    telepon:{
        type    : String,
        require : true
    },
    website:{
        type    : String,
        require : true
    },
    status:{
        type    : String,
        require : true
    },
    students:{
        type : mongoose.Schema.Types.ObjectId,
        ref  : 'users'
    }
});

const CompanySchema = mongoose.Schema({
    nama:{
        type    : String,
        require : true
    },
    alamat:{
        type    : String,
        require : true
    },
    email:{
        type    : String,
        require : true
    },
    telepon:{
        type    : String,
        require : true
    },
    website:{
        type    : String,
        require : true
    },
    status:{
        type    : String,
        require : true
    },
    students:{
        type : mongoose.Schema.Types.ObjectId,
        ref  : 'users'
    }
});

感谢您的所有回复。

Answer 1

您正在尝试将字符串转换为 objectId。要保存该值，请使用 mongoose.Types.ObjectId。那会解决你的问题。让我知道是否有帮助。谢谢