Question

我将只更改角色的book_mode字段和状态的book_mode字段，但是执行findOneAndUpdate（）之后，角色和状态的patrol_mode字段消失了。我想保留那个领域。我该怎么办？

var userSchema = new Schema({
user_id: String,
name: String,
avatar: String,
role: {
    book_mode: Number,
    patrol_mode: Number
},
status: {
    book_mode: Number,
    patrol_mode: Number
},
created_at: Number,
updated_at: Number
}, {collection: 'users'});

var updateData = {
status: {
    book_mode: APPROVED
},
role: {
    book_mode: req.body.role
}
}

User.findOneAndUpdate({
            _id: mongoose.Types.ObjectId(req.body._id)
        },
        {$set: updateData},
        function(err, doc){
            if(err){
                resData.message = 'failed';
                resData.code = 501;
                resData.flag = false;
                resData.data = err;
                res.send(resData);
                return;
            }
            resData.data = doc;
            resData.message = 'success';
            resData.code = 200;
            resData.flag = true
            res.send(resData);
            return;
        });

Answer 1

因为您将整个父对象重新分配为仅包含book_mood，所以可以使用点符号来访问特定字段。

updateData = {
  "status.book_mode":  APPROVED,
  "role.book_mode":  req.body.rol
  }

那是如果APPROVED和req.body.rol包含book_mood的字符串，如果它包含一个对象，那么您必须将其更改为

updateData = {
  "status.book_mode":  APPROVED.book_mode,
  "role.book_mode":  req.body.rol.book_mode
  }

如何在nodejs猫鼬中仅更新一个对象字段

1 个答案: