如何填充 ObjectIDS 数组的每个条目？

Question

我正在填充一个 ObjectId 数组。我哪里错了？

我试图参考这个，但找不到解决我问题的方法。 Mongoose - accessing nested object with .populate

执行 .populate 的代码：

router.get("/event", (req, res) => {
  Client.findById(req.params.client_id)
  .populate("EventsNotifications")
    .then(foundClient => {
      res.json(foundClient.eventsNotifications);
    })
    .catch(err => {
      console.log(`error from get event notifications`);
      res.json(err);
    });
});

eventsNotifications 架构：

const mongoose = require('mongoose'),
      Schema   = mongoose.Schema;

const eventNotificationSchema = new Schema({

    notification: {
        type: String,
    },
    read: {
        type: Boolean,
        default: false,
    }

}, {timestamps: true});

module.exports = mongoose.model("EventNotification",eventNotificationSchema);

客户端架构：

const mongoose = require("mongoose"),
  Schema = mongoose.Schema,
  ObjectId = Schema.Types.ObjectId;

var validatePhone = function(contact) {
  var re = /^\d{10}$/;
  return contact == null || re.test(contact);
};

const clientSchema = new Schema({
  firstName: {
    type: String,
    required: true,
    minlength: 2
  },
  lastName: {
    type: String,
    required: false,
    minlength: 2
  },
  email: {
    type: String,
    required: true,
    match: [
      /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/,
      "Please fill a valid email address"
    ]
  },
  contact: {
    type: Number,
    required: true,
    validate: [validatePhone, "Please fill a valid phone number"]
  },
  eventsNotifications: [
    {
      type: ObjectId,
      ref: "EventNotification"
    }
  ]
});

module.exports = mongoose.model("Client", clientSchema);

我期待所有事件通知的数组：

[{
"_id":"5d3c8d54126b9354988faf27",
"notification":"abdefgh",
"read":true
},
{"_id":"5d3c8d54126b9354988faf23",
"notification":"abdefgh",
"read":true
}
]

但是如果我尝试 console.log(foundClient.eventsNotifications[0].notification)，我得到一个空数组，这意味着没有填充 eventsNotifications 数组。

事实上，我什至不想在键上做.notification、.read 等事情，我想return 整个对象数组。

Answer 1

在.populate函数中.populate("EventsNotifications"), 必须提及包含 ObjectId 的字段名称。

所以，我只是将其更改为 .populate("eventsNotifications") 它奏效了。

如何填充 ObjectIDS 数组的每个条目？

How to populate each entry of an array of ObjectIDS?

mongoose

node.js

mongoose-populate