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我一直在使用sequelize-typescript,tsyringe在这里进行重构工作，我在这里遇到了一个非常有趣的错误。好吧，通常我的所有存储库容器都正常注册并使用以下设置正确实例化：

  • 我在我的应用程序的根目录和tsyringe它之后的容器上导入反映元数据

    import 'reflect-metadata';
import 'dotenv/config';
import express, { Request, Response, NextFunction } from 'express';
...
import '@shared/infra/sequelize/index'; // default sequelize connection
import '@shared/container/index';

  • 容器/索引内部是以下代码，我sequelize-typescript用来制作存储库。

    
import { container } from 'tsyringe';

import IUsersRepository from '@modules/users/repositories/IUsersRepositories';
import UsersRepository from '@modules/users/infra/sequelize/repositories/UserRepository';
...
import IModelRepository from '@modules/model/repositories/IModelRepository';
import ModelRepository from '@modules/model/infra/sequelize/repositories/ModelRepository';

container.registerSingleton<IUsersRepository>(
  'UsersRepository',
  UsersRepository,
);
...
container.registerSingleton<IModelRepository>(
  'ModelRepository',
  ModelRepository,
);

  • 然后我用快递做所有的路由：

    import { Router } from 'express';
import bdDecider from '@shared/infra/http/middlewares/bdDecider';
import ensureAuthenticated from '@modules/users/infra/http/middlewares/EnsureAuthenticated';
import UserRouter from '@modules/users/infra/http/routes/user.routes';
...
import ModelRouter from '@modules/model/infra/http/routes/model.routes';

const routes = Router();

routes.use('/sessions', SessionRouter);
routes.use(ensureAuthenticated);
routes.use(bdDecider); //bdDecider as it says gets the logged on user bdConfig so i can connect to it
routes.use('/model', ModelRouter);

  • 所以我们去调用的路线container.resolve()

    import { container } from 'tsyringe';
import { Response, Request } from 'express';
import ShowModelsService from '@modules/invoices/services/ShowModelsService';

export default class ShowModelsController {
  public async show(req: Request, res: Response): Promise<Response> {
    const { id } = req.params;

    const showModelsService = container.resolve( //it calls the model service
      ShowModelsService,
    );

    const models = await showModelsService.execute(
      id,
    );

    return res.json(models);
  }
}

  • 这是他调用的服务

    import IModelRepository from '@modules/model/repositories/IModelRepository';
import AppError from '@shared/errors/AppError';
import { inject, injectable } from 'tsyringe';
import IModelDTO from '../dtos/IModelDTO';

type IResponse = IModelDTO;

@injectable()
export default class ShowModelService {
  constructor(
    @inject('ModelRepository')
    private modelRepository: IModelRepository,
  ) {}

  public async execute(id: string): Promise<IResponse> {
    const model = await this.modelRepository.get_models(
      id,
    );

    if (!model) {
      throw new AppError('Model not found!', 404);
    }

    return model;
  }
}

  • 直到那里一切都很好并且工作正常，但是当我尝试将该模型与另一个使用sequelize. Tsyringe停止能够正确注入依赖项并给出标题错误消息。这是我要关联的模型。

    import Model from '@modules/model/infra/sequelize/entities/Model';
import { DataTypes } from 'sequelize';
import { Sequelize } from 'sequelize-typescript';
import User from '../entities/User';
export default (sequelize: Sequelize): void => {
Model.init(
    {
      primary: {
        allowNull: false,
        autoIncrement: true,
        primaryKey: true,
        type: DataTypes.INTEGER,
      },
      camp1: DataTypes.DECIMAL(20, 2),
      camp2: DataTypes.DATE,
    },
    {
      tableName: 'tbl_model',
      sequelize,
    },
  );
  Model.hasMany(User);
}

  • 如果我删除那个“ Model.hasMany(User);”它会恢复正常并且注射发生，我很困惑不知道发生了什么......

  • 顺便说一下，这是我的模型库

    import IModelRepository from '@modules/model/repositories/IModelRepository';
import AppError from '@shared/errors/AppError';
import { connection } from '@shared/infra/http/middlewares/bdDecider';
import { Repository } from 'sequelize-typescript';
import IModelDTO from '@modules/model/dtos/IModelDTO';
import initModel from '../utils/initInvoice';
import initUser from '../utils/initItem';
import Model from '../entities/Model';
import User from '../entities/User';

export default class ModelRepository implements IModelRepository {
  private ormRepository: Repository<Model>;

  constructor() {
    if (!connection) {
      throw new AppError(
        `You don't have a client settled on your user credentials or you don't have a client settled or both`,
      );
    }
    initModel(connection); // it Model.init() the model with the hasmany association
    initUser(connection); // it User.init()
    this.ormRepository = connection.getRepository(Model);
  }
  public async get_models(
    id: string,
  ): Promise<IModelDTO | null> {
    const models = await this.ormRepository.findOne({
      where: { id },
      include: [
        {
          model: User,
        },
      ],
    });
    return models;
  }
}

  • 如果信息太多，我很抱歉，但我试图提供尽可能多的信息，以便有人可以帮助我。但老实说，我对找到解决方案持怀疑态度，可能我不得不将此方法与这个模型并尝试分开做。正如您注意到的那样，我更改了模型的名称，所以我可能拼错了一些东西，但不用担心实际代码上没有拼写错误，因为这个错误只会在我将“ Model.hasMany(User);”添加到initModel()函数时发生。希望有人能够帮助我，我会在身边的任何问题都不要害怕问。:)

4

1 回答 1

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哦，好吧，我想出了一个解决方案。在调用container.resolve(). 由于某种原因，当您尝试在其中初始化模型时，它看起来好像丢失了引用并且无法注入。但现在一切都好:)

     constructor() {
        if (!connection) {
          throw new AppError(
            `You don't have a client settled on your user credentials or you don't have a client settled or both`,
          );
        }
    initModel(connection); 
    initUser(connection); 
    this.ormRepository = connection.getRepository(Model);
  }

所以我只是从存储库构造函数中删除了 initModel 和 initUser 函数，并在container.resolve()被调用之前放在其他地方。

于 2021-02-20T11:18:57.697 回答