PHP - Laravel依赖注入:将参数传递给依赖构造函数

Question

我正在构建一个Laravel项目,在一个控制器中,我在一个方法中注入了两个依赖项:

public function pusherAuth(Request $request, ChannelAuth $channelAuth) { ... }

我的问题很简单:如何将参数传递给$channelAuth依赖项？

目前我正在使用一些setter传递所需的依赖项:

public function pusherAuth(Request $request, ChannelAuth $channelAuth)
{
    $channelAuth
        ->setChannel($request->input('channel'))
        ->setUser(Auth::user());

这种方法有哪些替代方案？

PS代码需要是可测试的.

Answer 1

感谢我在Laracast讨论中获得的帮助,我能够回答这个问题.使用服务提供程序,可以通过将正确的参数传递给构造函数来初始化依赖项.这是我创建的服务提供商:

<?php namespace App\Providers;

use Security\ChannelAuth;
use Illuminate\Contracts\Auth\Guard;
use Illuminate\Http\Request;
use Illuminate\Support\ServiceProvider;

class ChannelAuthServiceProvider extends ServiceProvider {

    /**
     * Bootstrap the application services.
     *
     * @return void
     */
    public function boot()
    {
        //
    }

    /**
     * Register the application services.
     *
     * @return void
     */
    public function register()
    {
        $this->app->bind('Bloom\Security\ChannelAuthInterface', function()
        {
            $request = $this->app->make(Request::class);
            $guard   = $this->app->make(Guard::class);

            return new ChannelAuth($request->input('channel_name'), $guard->user());
        });
    }
}