Nest通过TypeORM操作MySQL
本文旨在说明如何通过NestJS实现以ORM方式操作MySQL：
如何安装MySQL不是本文重点，就此跳过。
安装NestJS
npm install -g typescript
npm install -g @nestjs/cli
cd [Project Path]
nest new dashboard
cd dashboard
npm install --save @nestjs/typeorm typeorm mysql
打开项目: code .
初始化模块
nest g module menus
nest g service menus
nest g controller menus
nest g class menus/menu.entity
Entity(实体)
import { Entity, Column, PrimaryGeneratedColumn } from 'typeorm';
@Entity('menu')
export class MenuEntity {
@PrimaryGeneratedColumn()
id: number;
@Column({ length: 45 })
firstname: string;
@Column({ length: 45 })
familyname: string;
@Column({ length: 200 })
email: string;
}
Service(服务)
import { Injectable } from '@nestjs/common';
import { InjectRepository } from '@nestjs/typeorm';
import { Repository } from 'typeorm';
import { MenuEntity } from './menu.entity';
@Injectable()
export class MenusService {
constructor(
@InjectRepository(MenuEntity)
private menusRepository: Repository<MenuEntity>,
) {}
async getUsers(user: MenuEntity): Promise<MenuEntity[]> {
return await this.menusRepository.find();
}
async getUser(_id: number): Promise<MenuEntity[]> {
return await this.menusRepository.find({
select: ['firstname', 'familyname', 'email'],
where: [{ id: _id }],
});
}
}
Controller(控制器)
import {
Controller,
Post,
Body,
Get,
Put,
Delete,
Param,
} from '@nestjs/common';
import { MenusService } from './menus.service';
import { MenuEntity } from './menu.entity';
@Controller('menus')
export class MenusController {
constructor(private service: MenusService) {}
@Get(':id')
get(@Param() params) {
return this.service.getMenu(params.id);
}
}
Menu.Module(模块)
import { Module } from '@nestjs/common';
import { TypeOrmModule } from '@nestjs/typeorm';
import { MenusService } from './menus.service';
import { MenusController } from './menus.controller';
import { MenuEntity } from './menu.entity';
@Module({
imports: [TypeOrmModule.forFeature([MenuEntity])],
providers: [MenusService],
controllers: [MenusController],
})
export class MenusModule {}
App.Module(根模块)
import { Module } from '@nestjs/common';
import { AppController } from './app.controller';
import { AppService } from './app.service';
import { MenusModule } from './menus/menus.module';
import { TypeOrmModule } from '@nestjs/typeorm';
@Module({
imports: [MenusModule, TypeOrmModule.forRoot()],
controllers: [AppController],
providers: [AppService],
})
export class AppModule {}
ormconfig.json
{
"type": "mysql",
"host": "localhost",
"port": 3306,
"username": "root",
"password": "Password01!",
"database": "dmp",
"entities": ["dist/**/*.entity.js"],
"synchronize": true
}
注意：此处的entities配置与参考文章不同，应该是版本问题。
参考
https://shaibenshimol.medium.com/nestjs-and-mysql-in-10-minutes-711e02ec1dab
--该文章用的typeorm版本和最新的nestjs略有不兼容，须参考bug fix部分做修改
Bug Fix
https://stackoverflow.com/questions/68317383/typeerror-rxjs-1-lastvaluefrom-is-not-a-function
https://github.com/nestjs/nest/issues/4283
