Nest搭建（1） - 技术博客

安装

bash
npm i -g @nestjs/cli
$ nest new project-name

入口：

typescript
import { NestFactory } from '@nestjs/core';
import { AppModule } from './app.module';

async function bootstrap() {
  const app = await NestFactory.create(AppModule);
  await app.listen(3000);
}
bootstrap();

controller

typescript
import { Controller, Get, Post } from '@nestjs/common';

export interface createCatDto {
  name: string;
  age: number;
  breed: string;
}

@Controller('cats')
export class CatsController {
  @Get()
  findAll(): string {
    return 'This action returns all cats';
  }
  @Post()
  async create(@Body() createCatDto: CreateCatDto) {
    this.catsService.create(createCatDto);
  }
}

`@Request(), @Req()`	`req`
`@Response(), @Res()`*****	`res`
`@Next()`	`next`
`@Session()`	`req.session`
`@Param(key?: string)`	`req.params` / `req.params[key]`
`@Body(key?: string)`	`req.body` / `req.body[key]`
`@Query(key?: string)`	`req.query` / `req.query[key]`
`@Headers(name?: string)`	`req.headers` / `req.headers[name]`
`@Ip()`	`req.ip`
`@HostParam()`	`req.hosts`

service

typescript
import { Injectable } from '@nestjs/common';

export interface Cat {
  name: string;
  age: number;
  breed: string;
}

@Injectable()
export class CatsService {
  private readonly cats: Cat[] = [];

  create(cat: Cat) {
    this.cats.push(cat);
  }

  findAll(): Cat[] {
    return this.cats;
  }
}

module

typescript
import { Module } from '@nestjs/common';
import { CatsController } from './cats/cats.controller';
import { CatsService } from './cats/cats.service';

@Module({
  controllers: [CatsController],
  providers: [CatsService],
})
export class CatModule {}