Mongoose 不参考新保存的文档填充以前保存的文档

Question

所有。

我正在编写一个 MEAN 堆栈应用程序，使用带有 Node/Express 的 Mongoose (4.0.6) 与 MongoDB 交互，当我稍后保存现有文档应该具有参考的新文档时，我遇到了填充已保存文档的困难到。具体来说，在应用程序中，我有一个用户在为该公司创建管理员帐户之前创建了一个公司实例，因此当用户将他/她自己注册为管理员时，我希望公司文档用新用户。

这是我的公司和用户架构：

用户.js...

var mongoose = require('mongoose');
var Schema   = mongoose.Schema;
var ObjectId = Schema.Types.ObjectId;

var userSchema = new Schema({
  first_name:      { type: String, required: '{PATH} is required!' },
  last_name:       { type: String, required: '{PATH} is required!' },
  username:        { type: String, required: '{PATH} is required!', lowercase: true, unique: true },
  password:        { type: String, required: '{PATH} is required!' },
  roles:           { type: [String] },
  company:         { type: ObjectId, ref: 'Company', required: true },
  db_permissions: [{ type: ObjectId, ref: 'DataConnection' }],
  created_by:      { type: ObjectId, ref: 'User' }, 
  created_at:      { type: Date, default: Date.now },
  updated_at:     [{ type: Date, default: Date.now }]
});

var User = mongoose.model('User', userSchema);

module.exports = {
  User: User
};

Company.js...

var mongoose = require('mongoose');
var Schema   = mongoose.Schema;
var ObjectId = Schema.Types.ObjectId;

var companySchema = new Schema({
  name:              { type: String, uppercase: true, required: '{PATH} is required!', unique: true }, 
  industry:          { type: String, required: '{PATH} is required!' }, 
  phone:             { type: String, required: '{PATH} is required!' },
  address_line_1:    { type: String, uppercase: true, required: '{PATH} is required!' },
  address_line_2:    { type: String, uppercase: true },
  city:              { type: String, uppercase: true, required: '{PATH} is required!' },
  state_prov:        { type: String, uppercase: true, required: '{PATH} is required!' },
  postal_code:       { type: String, required: '{PATH} is required!' },
  country:           { type: String, required: '{PATH} is required!' }, 
  logo_url:            String,
  users:            [{ type: ObjectId, ref: 'User' }],
  data_connections: [{ type: ObjectId, ref: 'DataConnection' }],
  created_at:        { type: Date, default: Date.now },
  updated_at:       [{ type: Date, default: Date.now }]
});

var Company = mongoose.model('Company', companySchema);

module.exports = {
  Company: Company
};

这是我的控制器中的代码：

User.create(userData, function(err, user) {
  if(err) {
    if(err.toString().indexOf('E11000') > -1) {
      err = new Error('Duplicate email');
    }
    res.status(400);
    return res.send({ reason:err.toString() });
  }
  console.log('company id: ' + user.company);
  Company.findById(user.company)
    .populate({path: 'users'})
    .exec(function (err, company) {
      if (err) return handleError(err);
      console.log(company.name + '\'s users now includes ' + company.users);
    });   
  res.send(user);

公司（例如 TEST53）使用空的 users 数组正确保存到数据库：

{
    "_id": "55ae421bf469f1b97bb52d5a",
    "name": "TEST53",
    "industry": "Construction",
    "phone": "2352626254",
    "city": "GDFGD",
    "country": "United States",
    "address_line_1": "DSGDFGH",
    "state_prov": "GF",
    "postal_code": "45645",
    "logo_url": "",
    "__v": 0,
    "updated_at": [
        "2015-07-21T12:59:07.609Z"
    ],
    "created_at": "2015-07-21T12:59:07.597Z",
    "data_connections": [],
    "users": []
}

然后当我创建用户时，它会正确保存：

{
    "_id": "55ae4238f469f1b97bb52d5b",
    "username": "test53@test.com",
    "password": "$2a$12$ZB6L1NCZEhLfjs99yUUNNOQEknyQmX6nP2BxBvo1uZGlvk9LlKGFu",
    "company": "55ae421bf469f1b97bb52d5a",
    "first_name": "Test53",
    "last_name": "Admin",
    "__v": 0,
    "updated_at": [
        "2015-07-21T12:59:36.925Z"
    ],
    "created_at": "2015-07-21T12:59:36.550Z",
    "db_permissions": [],
    "roles": [
        "admin"
    ]
}

我可以看到正确的 ObjectId 打印到 user.company 的控制台：

company id: 55ae421bf469f1b97bb52d5a

但是公司的 users 数组没有填充用户的 id，并且 .exec 函数内的 console.log 打印“TEST53's users now includes ”。

我尝试了几种连接方式，仅使用 'users' 而不是 { path: 'users' }，编写一个将用户推送到数组中的函数，使用 .run 而不是 .exec，但到目前为止没有成功。

我有什么明显的遗漏吗？提前感谢您的任何建议！

Answer 1

您实际上并未将用户添加到公司。

试试这个：

Company.findById(user.company, function (err, company) {
  if (err) return handleError(err);

  // Add the user to the company's list of users.
  company.users.push(user);

  // Need to save again.
  company.save(function(err) {
    if (err) return handleError(err);
    console.log(company.name + '\'s users now includes ' + company.users);
  });
});
res.send(user);

在我看来，您想要做的只是更新 Company 模型以添加用户，而不是实际使用（填充的）Company 文档作为响应，所以我省略了一个额外的 @ 987654324@电话。