Question

NestJs的新手，根据https://docs.nestjs.com/techniques/database进行配置后无法弄清楚我的代码问题。

错误：Nest无法解析AdminRepository（？）的依赖项。请确保在TypeOrmModule上下文中可使用索引[0]处的连接Connection。

管理模块：

import { Module } from '@nestjs/common';
import {Admin} from "../entities/Admin";
import {TypeOrmModule} from '@nestjs/typeorm';
import {AdminService} from "./admin.service";
import {AdminController} from "./admin.controller";

@Module({
    imports:[TypeOrmModule.forFeature([Admin])],
    exports: [TypeOrmModule],
    providers: [AdminService],
    controllers: [AdminController]
})
export class AdminModule {}

AdminController：

import { Controller } from '@nestjs/common';

@Controller('admin')
export class AdminController {}

AdminService：

import { Injectable } from '@nestjs/common';
import { Repository } from 'typeorm';
import { InjectRepository } from '@nestjs/typeorm';
import { Admin } from '../entities/Admin';


@Injectable()
export class AdminService {
    constructor(
        @InjectRepository(Admin)
        private readonly adminRepository:Repository<Admin>
    ) {}
}

应用模块：

import { Module } from '@nestjs/common';
import { AppController } from './app.controller';
import { LoginController } from './login/login.controller';
import { RegisterController } from './register/register.controller';
import { ContactController } from './contact/contact.controller';

import { AppService } from './app.service';
import { LoginService } from './login/login.service';
import { ContactService } from './contact/contact.service';
import { RegisterService } from './register/register.service';
import { AdminModule } from './admin/admin.module';

@Module({
  imports: [AdminModule],
  controllers: [AppController, LoginController, RegisterController, ContactController],
  providers: [AppService, LoginService, ContactService, RegisterService],
})
export class AppModule {}

Answer 1

您似乎在TypeOrmModule.forRoot()/forRootAsync()中缺少AppModule，从而建立了到数据库的初始连接。确保已将其添加到imports数组（具有必要的配置）中，您应该会很好。

Answer 2

您必须在应用模块中导入typeorm配置。请参考下面的代码。

import { Module } from '@nestjs/common';
import { AppController } from './app.controller';
import { LoginController } from './login/login.controller';
import { RegisterController } from './register/register.controller';
import { ContactController } from './contact/contact.controller';

import { AppService } from './app.service';
import { LoginService } from './login/login.service';
import { ContactService } from './contact/contact.service';
import { RegisterService } from './register/register.service';
import { AdminModule } from './admin/admin.module';
import { TypeOrmModule } from '@nestjs/typeorm';


@Module({
  imports: [TypeOrmModule.forRoot(),AdminModule],
  controllers: [AppController, LoginController, RegisterController, ContactController],
  providers: [AppService, LoginService, ContactService, RegisterService],
})
export class AppModule {}

NestJs无法解析依赖关系，为什么？

2 个答案: