如何在typeorm中加入树结构中的每个子实体

How to join every child entity in a tree structure in typeorm

我有一个类别的树结构。这些类别与其他表有关系。

import {Entity, Column, PrimaryGeneratedColumn, ManyToOne, OneToMany} from "typeorm";
@Entity()
export class Category {

    @PrimaryGeneratedColumn()
    id: number;

    @Column()
    name: string;

    @Column()
    description: string;

    @ManyToOne(type => Category, category => category.children)
    parent: Category;

    @OneToMany(type => Category, category => category.parent)
    children: Category[];

    @OneToMany(type => Site, site => site.category)
    sites: Site[];
}

我获取树的代码:

console.log(await getConnection().getTreeRepository(Category).findTrees());

结果:

[
  Category {
    pk: 8,
    id: '1C606380-020A-4CED-8EBA-AA1C9C16FCF2',
    title: 'Category EXPLICIT',
    createdBy: 'SAFETYMANUAL',
    createdAt: 2021-07-27T19:57:03.213Z,       
    hidden: false,
    orderValue: 0,
    deletionDate: null,
    childCategories: [ [Category] ]
  }
]

我想用关系加载整棵树,在本例中是用站点数组。将 eager 设置为 true 不会改变任何内容。我只取回没有站点数组的树。有没有可能加入树结构?

我实施了一个启用树加载关系的拉取请求:

const treeCategoriesWithRelations = await repository.findTrees({ relations: ["sites"] });
// automatically joins the sites relation