laravel 5 中新增的命令总线特性让我感到困惑。为什么我们可以在控制器中完成相同的任务,而需要使用命令呢?
命令(Command)
class PurchasePodcast extends Command implements SelfHandling {
protected $user, $podcast;
/**
* Create a new command instance.
*
* @return void
*/
public function __construct(User $user, Podcast $podcast)
{
$this->user = $user;
$this->podcast = $podcast;
}
/**
* Execute the command.
*
* @return void
*/
public function handle()
{
// Handle the logic to purchase the podcast...
event(new PodcastWasPurchased($this->user, $this->podcast));
}
}
Controller
use Illuminate\Foundation\Bus\DispatchesCommands;
use Illuminate\Routing\Controller as BaseController;
use Illuminate\Foundation\Validation\ValidatesRequests;
use PurchasePodcast;
abstract class Controller extends BaseController {
use DispatchesCommands, ValidatesRequests;
public function purchasePodcast($podcastId)
{
$this->dispatch(
new PurchasePodcast(Auth::user(), Podcast::findOrFail($podcastId))
);
}
}
Why should I make it complex, while I can straight away do it in controller rather than using command.