Mongoose 模式 - 具有共享属性的嵌套对象

Question

我是 MongoDB 和 Mongoose 的新手，并试图找出处理创建架构的最佳方法。我更习惯于关系数据库，但我希望这将适用于 Mongo。

我正在创建“扩展”其他对象的对象。例如，我有一个人对象，我想将其用作父对象或祖父对象的起点。父母和祖父母都可能具有超出基本人所具有的附加值（我只是在每个中包含一个示例）...

const personSchema = new mongoose.Schema({
    name: String,
    birthDate: Date,
    deathDate: Date,
    });

const parentSchema = new mongoose.Schema({
    //all the stuff a person has + below:
    children: [personSchemas?]  //[array of persons, important... parents can also be children, 
multiple parents will share the same child]
    parentingStyle: String, 
})

const grandParentSchema = new mongoose.Schema({
    // stuff that a parent has plus
    grandparentingStyle: String,
})

Answer 1

我认为以下帖子包含一些可能对您有所帮助的答案： Referencing another schema in Mongoose

除此之外，我还建议您将父母和祖父母定义为角色：

var mongoose = require('mongoose');

const PersonSchema = new mongoose.Schema({
    person_id: {
        type: mongoose.Schema.Types.ObjectId
    }, 
    name: String,
    birthDate: Date,
    deathDate: Date,
    
    //the following is if you want later to fetch persons by role
    role: {
    type: string,
    enum: ["parent", "grandParent","child"], 
    }
    });
//Then you could do it this way 
const ParentSchema = new mongoose.Schema({
    //all the stuff a person has + below:
    children: [personSchemas],
    parentingStyle: String
})

//Or this way 
const ParentSchema = new mongoose.Schema({
    //all the stuff a person has + below:
    children: {
        type: mongoose.Schema.Types.ObjectId,
        ref: 'Person' 
    }
    parentingStyle: String, 
})

const GrandParentSchema = new mongoose.Schema({
    // same as for parents (ether way)
    // stuff that a parent has plus
    grandparentingStyle: String
})

在非关系型数据库中，这实际上取决于您以后希望如何处理这些数据。 “关节”（与关系数据库比较）更容易创建，可以通过引用 id 或获取整个数组（就像您所做的那样），或者只是通过稍后进行更精细的查询。