typeorm基本连接说明

符合指南类型: https://github.com/typeorm/typeorm/blob/master/docs/select-query-builder.md#inner-and-left-joins

(type => Photo, photo => photo.user)

什么是类型?什么是照片=>照片。链接上的解释不好。

部分代码:

Import {Entity, PrimaryGeneratedColumn, Column, OneToMany} from "typeorm";
import {Photo} from "./Photo";

@Entity()
export class User {

    @PrimaryGeneratedColumn()
    id: number;

    @Column()
    name: string;

    @OneToMany(type => Photo, photo => photo.user)
    photos: Photo[];
}

在代码上:

const user = await createQueryBuilder("user")
    .leftJoinAndSelect("user.photos", "photo")
    .where("user.name = :name", { name: "Timber" })
    .getOne();

“user.photos”来自哪里?