Nest-控制器之方法参数装饰器

本文介绍Nest-控制器和装饰器，介绍了各种装饰器的用法和场景。

nestjs 提供了方法参数装饰器，可以更便捷获取参数

• 装饰器	作用
  @Request()	req
  @response()	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]
  @Header(name? string)	req.headers/req.headers[name]
  @HttpCode(code: number)	http code

各种参数装饰器使用方法

  import {Controller,Get,Post,Body,Patch,Param,Delete,Req,Res,Request,Response,Session,HttpCode,Headers,Redirect,} from '@nestjs/common';
  import { DemoService } from './demo.service';
  import { CreateDemoDto } from './dto/create-demo.dto';
  import { UpdateDemoDto } from './dto/update-demo.dto';

  @Controller({
    path: 'demo',
  })
  export class DemoController {
    constructor(private readonly demoService: DemoService) {}

    @Post()
    create(@Headers() headers, @Body('id') createDemoDto: CreateDemoDto) {
      console.log(headers);
      return this.demoService.create(createDemoDto);
    }

    @Get()
    // findAll(@Req() req, @Res() res) {
    findAll(@Request() req, @Response() res, @Session() session) {
      console.log(req, res, session);
      return this.demoService.findAll();
    }

    @Get(':id')
    @HttpCode(500)
    findOne(@Param('id') id: string) {
      return this.demoService.findOne(+id);
    }

    @Patch(':id')
    @Redirect('/')
    update(@Param('id') id: string, @Body() updateDemoDto: UpdateDemoDto) {
      return this.demoService.update(+id, updateDemoDto);
    }

    @Delete(':id')
    remove(@Param('id') id: string) {
      return this.demoService.remove(+id);
    }
  }