第五章：Controller —— 柜台只负责接待，不负责开飞机

// src/flights/flights.controller.ts
import { Controller, Get, Param, Post, Body } from '@nestjs/common';
import { FlightsService } from './flights.service';
import { CreateFlightDto } from './dto/create-flight.dto';

@Controller('flights')
export class FlightsController {
  constructor(private readonly flightsService: FlightsService) {}

  @Get()
  findAll() {
    return this.flightsService.findAll();
  }

  @Get(':id')
  findOne(@Param('id') id: string) {
    return this.flightsService.findOne(id);
  }

  @Post()
  create(@Body() dto: CreateFlightDto) {
    return this.flightsService.create(dto);
  }
}

FlightsController
├── GET /flights       -> 查询全部航班
├── GET /flights/:id   -> 查询某个航班
└── POST /flights      -> 新建航班