Nest搭建（1）

安装

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

入口：

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

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

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

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 {}