nestjs - 尝试在 NestJS 中注入(inject) Bull Queue 时无法解决依赖关系

Question

我正在尝试使用 Bull/Redis 实现 Nodemailer 来处理 NestJS 中的电子邮件类型的任务。
我有一个名为 EmailService 的共享模块将作业添加到我的队列中，为此，它需要注入(inject) Queue来自 'bull' .

Nest can't resolve dependencies of the EmailService (?). Please makesure that the argument BullQueue_mailqueue at index [0] is availablein the SharedModule context.

我的结构

├── src
|  ├── app.module.ts
|  ├── config
|  |  └── nodemailer
|  |     ├── nodemailer.module.ts
|  |     ├── nodemailer.service.ts
|  └── modules
|     ├── modules that imports the SharedModule to send emails.
|  └── shared
|     ├── processors
|     |  └── email.processor.ts
|     ├── services
|     |  └── email
|     ├── shared.module.ts

应用模块

@Module({
  imports: [
    NodemailerModule,
    // Al other modules (functionalities of my application that imports the SharedModule)
  ],
})
export class AppModule {}

nodemailer.module

@Module({
  imports: [
    MailerModule.forRootAsync({
      useClass: NodemailerService,
    }),
    BullModule.registerQueueAsync({
      useClass: NodemailerService,
    }),
  ],
  exports: [NodemailerService, BullModule], // <- Exports BullModule
  providers: [NodemailerService],
})
export class NodemailerModule {}

节点邮件服务

@Injectable()
export class NodemailerService implements BullOptionsFactory {
  constructor() {}

  createBullOptions(): Promise<BullModuleOptions> | BullModuleOptions {
    return {
      name: 'myqueue',
      redis: {
        host: 'localhost',
        port: 6379,
      },
    };
  }

}

现在这是我的 EmailService，它是 SharedModule 的一部分。

import { Injectable } from '@nestjs/common';
import { InjectQueue } from '@nestjs/bull';
import { Queue } from 'bull';

@Injectable()
export class EmailService {

  constructor(
    @InjectQueue('myqueue')
    private readonly mailQueue: Queue,
  ) {}

}

共享模块

@Module({
  imports: [NodemailerModule], // < imports this because it has the Bull configuration as we saw above
  exports: [EmailService],
  providers: [EmailService, EmailProcessor],
})
export class SharedModule {}

我试图按照以下步骤操作:

https://firxworx.com/blog/coding/nodejs/email-module-for-nestjs-with-bull-queue-and-the-nest-mailer/

Implementing Bull Queue in Typescript

我不明白为什么我的 EmailService无法注入(inject) BullQueue 依赖项。
我在这里缺少什么？

Answer 1

注入(inject)队列的模块需要导入队列注册。 IE。folder/some.module.ts

@Module({
  imports: [
    BullModule.registerQueue({
      name: 'some-queue',
    }),
  ],
  providers: [SomeService],
})
export class SomeModule {}

然后在 SomeService folder/some.service.ts

constructor(
  @InjectQueue('some-queue') private someQueue: Queue,
) {}