Nest中的控制器、路由、get()、post()与装饰器

nest的cli命令

nest g --help 命令 可以调出cli命令菜单

    | application   │ application │ Generate a new application workspace         │
    │ class         │ cl          │ Generate a new class                         │
    │ configuration │ config      │ Generate a CLI configuration file            │
    │ controller    │ co          │ Generate a controller declaration            │
    │ decorator     │ d           │ Generate a custom decorator                  │
    │ filter        │ f           │ Generate a filter declaration                │
    │ gateway       │ ga          │ Generate a gateway declaration               │
    │ guard         │ gu          │ Generate a guard declaration                 │
    │ interceptor   │ in          │ Generate an interceptor declaration          │
    │ interface     │ interface   │ Generate an interface                        │
    │ middleware    │ mi          │ Generate a middleware declaration            │
    │ module        │ mo          │ Generate a module declaration                │
    │ pipe          │ pi          │ Generate a pipe declaration                  │
    │ provider      │ pr          │ Generate a provider declaration              │
    │ resolver      │ r           │ Generate a GraphQL resolver declaration      │
    │ service       │ s           │ Generate a service declaration               │
    │ library       │ lib         │ Generate a new library within a monorepo     │
    │ sub-app       │ app         │ Generate a new application within a monorepo │
    │ resource      │ res         │ Generate a new CRUD resource                 |

NestJS 中的路由

NestJS 中没有单独配置路由的地方，定义好控制器后nestjs会自动配置对应的路由

import { Controller, Get, Query, Request, Body } from '@nestjs/common';
@Controller('user')
export class UserController {

  @Get()
  index() {
    return '此get请求通过 http://localhost/user 访问';
  }

  // 通过 @Query装饰器获取get传值
  @Get('add')
  addData(@query() query) {
    console.log(query + '是获取到get请求的参数');
    retrun '此get请求通过 http://localhost/user/add 访问';  
  }

  // 通过 @Request装饰器获取get传值
  @Get('edit')
  addEdit(@Request() req) {
    console.log(req.query);
    retrun '此get请求通过 http://localhost/user/edit 访问';  
  }

  // 通过 @Body装饰器获取post传值
  @Post('create')
  addEdit(@Body() body) {
    console.log(body);
    retrun '此get请求通过 http://localhost/user/create 访问';  
  }


  // 获取动态路由  localhost/user/123
  @Get(":id")
  index(@Param() param) {
    console.log(param);  // {id: '123'}
    return '获取动态路由'
  }
}

类似的还有 Put() 、Delete()、 ... 等装饰器