模块化Modules

假定【 user 】模块需要调用公共模块 【shared】

src/shared/system.service.ts

import { Injectable, Inject } from '@nestjs/common';

@Injectable()
export class SystemService {
    constructor() { }
    getEnv() {
        return {
            a: 1
        }
    }
}

src/shared/shared.module.ts

import { Module } from '@nestjs/common';
import { SystemService } from './services/system.service';

@Module({
  controllers: [],

  imports: [],
  exports: [SystemService],
  providers: [SystemService],
})
export class SharedModule { }

src/user/user.module.ts

import { Module } from '@nestjs/common';
import { UserService } from './user.service';
import { UserController } from './user.controller';
import { SharedModule } from '../shared/shared.module';

@Module({
  controllers: [UserController],
  providers: [UserService],
  imports: [SharedModule]  // 引用模块
})
export class UserModule { }

src/user/user.service.ts

export class UserService {

  constructor(
    // 追加模块注入
    private readonly systemService: SystemService) {
  }

  create(createUserDto: CreateUserDto) {

    // 追加调用模块
    console.log(this.systemService.getEnv())

    // 调用Modle
    return 'This action adds a 🚀 new user';
  }
 }