Question

我正在开发Express，Node和Mongo作为数据库的应用程序。我有一个集合users，user可以有多个registered-IDs。它就像一个one-to-many关系。我试图在用户集合中嵌入document，如下所示：

post(function (req, res, next) {
    var pid=req.body.pid;
    var sid=req.body.sid;
    var rfname=req.body.rfname;
    var des=req.body.des;
    var brand=req.body.brand;
    var model=req.body.model;
    var serial=req.body.serial;
    var location=req.body.location;

    var arr={pid: 'pid', sid: 'sid', rfname: 'rfname' ,des: 'des', brand: 'brand', model: 'model' ,serial: 'serial', location: 'location'};

    mongoose.model('User').findOne({'pemail': req.session.email}, function (err, user){
        if(err){

        } else {
            user.registeredId = arr;

            user.save(function(err){
                if(err){

                } else {
                    res.render('user/register', {'success': 'dfhlaksdhfh'});
                }
            })
        }
    });
}

我的用户架构是这样的：

var mongoose = require('mongoose');  
var userSchema = new mongoose.Schema({  
  email: String,
  password: String,
  fname: String,
  lname: String,
  plang: String,
  slang: String,
  country: String,
  state: String,
  city: String,
  postalcode: String,
  address1: String,
  address2: String,
  pemail: String,
  semail: String,
  age: String,
  gender: String,
  pphone: String,
  sphone: String,
  q1: String,
  a1: String,
  q2: String,
  a2: String,
  cfname: String,
  clname: String,
  cemail: String
});
mongoose.model('User', userSchema);

指导我，我做错了什么，因为它没有在现有文档中嵌入文档。我是否需要在架构中定义它，如果是，那么如何？

Answer 1

在架构定义中，字段registeredId未定义，默认情况下通过 strict option ，Mongoose确保传递给模型构造函数的值未在我们的模式不会保存到数据库，因此它不会创建修改后的文档。

您可以在架构中明确定义字段，也可以在架构定义中将strict选项设置为false：

// set to false..
var userSchema = new Schema({..}, { strict: false });

然后实施其中一个 findAndModify() 方法，例如 findOneAndUpdate() ，通过将新对象推送到新数组字段来更新用户文档registeredId。所以你可以重新编写你的帖子功能：

post(function (req, res, next) {
    var User = mongoose.model('User'),
        pid=req.body.pid,
        sid=req.body.sid,
        rfname=req.body.rfname,
        des=req.body.des,
        brand=req.body.brand,
        model=req.body.model,
        serial=req.body.serial,
        location=req.body.location, 
        arr = {
            'pid': pid, 
            'sid': sid, 
            'rfname': rfname,
            'des': des, 
            'brand': brand, 
            'model': model,
            'serial': serial, 
            'location': location
        },
        condition = { 'pemail': req.session.email },
        update = {
            "$push": { 'registeredId': arr }
        };

    User.findOneAndUpdate(
        condition,
        update,
        function (err, doc){
            if(err){} 
            else {
                // doc contains the modified document
                res.render('user/register', {'success': 'dfhlaksdhfh'});
            }
        }
    );
});

Express：将文档嵌入现有文档中

1 个答案: