Question

我正在使用ExpressJS + MongoDB + TypeScript。以下是我的模型

export class Author {
    name: string;
    dob: Date;
}

export class Publisher {
    name: string;
    address: string;
}

import {Author} from './Author';
import {Publisher} from './Publisher';

export class Book {
    name: string;
    price: number;
    author: Author;
    publisher: Publisher;
}

我已按以下方式插入数据

let publisher1: Publisher = new Publisher();
publisher1.name = "Publisher 1";
publisher1.address = "Amritsar";

let publisher2: Publisher = new Publisher();
publisher2.name = "Publisher 2";
publisher2.address = "Bangalore";

let author1: Author = new Author();
author1.name = "Author 1";
author1.dob = new Date();

let author2: Author = new Author();
author2.name = "Author 2";
author2.dob = new Date();

let book1: Book = new Book();
book1.name = "Book 1";
book1.price = 50;
book1.author = author1;
book1.publisher = publisher1;

let book2: Book = new Book();
book2.name = "Book 2";
book2.price = 100;
book2.author = author2;
book2.publisher = publisher2;

let book3: Book = new Book();
book3.name = "Book 3";
book3.price = 150;
book3.author = author1;
book3.publisher = publisher2;

创建了3个集合，即发布者（2个文档），作者（2个文档）和书籍（3个文档）。

现在，当我使用以下代码将作者1 的名称更新为作者5 时，它会在作者集合中更改。

this.db.collection('Author').findOneAndUpdate({
    name: "Author 1"
}, {
    $set: {
        name: "Author 5"
    }
})

但是当我查询名为第1册或第3册的书籍时，它仍然引用名称作者1 而不是作者5

在参考图书集中的文件时是否有问题？

Answer 1

您指定Book架构中的author字段具有与Author架构相同的架构。当您创建一本书并将作者记录作为字段author的值传递给它时，您将直接在Book记录中设置值。它没有将两个记录链接在一起。要更新两个记录中的名称，您必须更新作者集合中的名称以及Book集合中每个相应记录的名称。

MongoDB引用的值未更新

1 个答案: