我想使用Node js将数组中的数据添加到MongoDB中的现有模式

Question

我是node和mongo的新手，我不知道该怎么做。{ "_id": "5b6af36fdca5531d140c4b36", "contact": 123456, "email": "John@xyz.com", "u_password": "user", "u_name": "John Doe", "u_id": 1, "__v": 0, "address": [ { "street": "xyz", "city": "abc", "state": "pqr" } ] }

这是我现有的架构，我希望输出如下

{
    "_id": "5b6af36fdca5531d140c4b36",
    "contact": 123456,
    "email": "John@xyz.com",
    "u_password": "user",
    "u_name": "John Doe",
    "u_id": 1,
    "__v": 0,
    "address": [
        {
            "street": "xyz",
            "city": "abc",
            "state": "pqr"
        },
        {
            "street" : "aaa",
            "city" : "bbb",
            "state" : "ccc"
        }
    ]
}

使用节点，我已经创建了现有的模式。现在，我想向此现有模式添加数据。我想要的输出在上面给出。

api.put('/address/add/:id', (req, res) => {
    User.findById( req.params.id , (err, user) => {
        if (err) {
            res.send(err);
        }
        const u = new user();
        var address = [ 
            {
                street : req.body.street,
                city : req.body.city,
                state : req.body.state
            }
        ];

        u.address = req.body.address;
        u.save((err) => {
            if (err){
                res.send(err);
            }
            user.address.push(u);
            res.json({ message: 'address added'});
        });
    });
});

这是我的代码