将JSON转换为Mongoose文档（以及子文档对象）

I am trying to covert nested JSON into mongoose document and subdocument and kind of not able to do it. I have searched web a lot and could not find any useful.

我试图将嵌套的JSON转换为mongoose文档和子文档，并且无法实现。我搜索了很多网页，找不到任何有用的东西。

Runkit Link: https://runkit.com/codesnooker/5a391097232f800012605983

Runkit链接：https：//runkit.com/codesnooker/5a391097232f800012605983

Here is my code:

这是我的代码：

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

const FbProfileSchema = new Schema({
    fb_id: {
        type: String,
        required: true,
        index: {
            unique: true
        }
    },
    first_name: String,
    last_name: String,
}, {
    toJSON: {
        transform: function (doc, ret) {
            var key = ret._id.toHexString();
            delete ret._id;
            ret._id = key;
        }
    }
});

const UserModel = new Schema({
    email: {
        type: String,
        required: true,
        index: {
            unique: true
        }
    },
    fbProfile: {
        type: Schema.ObjectId,
        ref: FbProfileSchema
    },
});

var FbProfile = mongoose.model('FbProfile', FbProfileSchema);
var User = mongoose.model('User', UserModel);

var json = "{\"fbProfile\":{\"_id\":\"5a38f1aff8920ebf2b098f40\",\"last_name\":\"My Last Name\",\"first_name\":\"My First Name\",\"fb_id\":\"temp_fb_id\",\"__v\":0},\"email\":\"[e-mail]\",\"__v\":0,\"_id\":\"5a38f1aff8920ebf2b098f41\"}";

var userJSON = JSON.parse(json);
var user = new User(userJSON);

And I am getting the output as follows:

我得到的输出如下：

But I would like to have fbProfile populated also so that I need not to hit db when using it in the project. Any idea how to do so?

但我想也填充fbProfile，以便在项目中使用它时我不需要点击db。知道怎么做吗？

1 个解决方案

#1

If a schema has a reference property to another collection then populate can be used to fetch and set that reference to the parent document.

如果模式具有另一个集合的引用属性，则可以使用populate来获取并设置对父文档的引用。

User.findOne({
  email: '[e-mail]'
}).populate('fbProfile').exec().then(/* do something */);