Question

我正在尝试学习依赖注入，现在已经在一个项目中实现了大约一周，已经将tsyringe与猫鼬一起使用了，并且一切正常，但是由于某种原因，当我尝试将其与typeorm一起使用时

我收到注入失败的原因是，因为未找到默认连接，但是无需在其他猫鼬项目中设置此tsyringe连接；

这是控制器代码，模型代码和路线代码，我隐藏了create方法，因为我知道问题不存在，因为我已经测试了很多次，任何技巧或建议都将有所帮助，并且可能但不在ormconfig.json中，但是我还是会把它放进去，因为我不确定：

import { Request, Response } from "express"
import { autoInjectable } from "tsyringe";
import { Repository } from "typeorm";
import {TeamEntity} from "../models/team.model";

@autoInjectable()
export default class TeamController {
    private repo: Repository<any>

    constructor(repo?: TeamEntity) {
        this.repo = repo.repo;
    }

    create = async (req: Request, res: Response) =>{
    // creates a new team
}
}

// team.controller.ts


@Entity({name: "teams"})
export default class TeamModel extends BaseEntity implements TeamI{
    @PrimaryGeneratedColumn({name: "team_id"})
    teamId: number

    @Column({name: "team_name"})
    teamName: string

}

@singleton()
export class TeamEntity{
    entity: BaseEntity = new TeamModel();
    repo: Repository<any> = getRepository(TeamModel)
}

//team.model.ts


import { Router } from "express";
import TeamController from "./controllers/team.controller";

const teamController = new TeamController();

const appRouter = Router();

appRouter.post("/teams", () => teamController.create);

export default appRouter;

//routes.ts

{
    "type": "postgres",
    "database": "postgres",
    "password": "<password>",
    "logging": true,
    "entities": [
       "src/models/*.model.ts"
    ],
    "migrations": [
       "src/migrations/*.migration.ts"
    ],
    "cli": {
       "entitiesDir": "src/models/",
       "migrationsDir": "src/migrations/"
    }
 }

\\ ormconfig.json

Answer 1

问题是我在完全连接数据库之前先实例化了Controller，我发现的解决方案是使用tsyringe的延迟装饰器，并删除private属性，控制器类保持如下状态：

    constructor(@inject(delay(() => TeamService)) public TeamService: TeamService) {
    }

尝试使用Tsyringe和Typeorm进行依赖注入时遇到问题

1 个答案: