How to use method injection with App::call in Laravel

Question

I am using Laravel 5.2 and wrote my own Service Provider. I want to inject a Request object into the register method.

The base problem is that I want to call different service container depending on a special request param - all the service container implementing the same interface/contract of course.

The error message I am getting is:

ReflectionException in Container.php line 559:
Function registerService() does not exist

My service provider looks like that:

<?php

namespace App\Providers;

use Illuminate\Http\Request;
use Illuminate\Support\ServiceProvider;
use App\Contracts\Extractor;

class ExtractorServiceProvider extends ServiceProvider
{
    /**
     * Indicates if loading of the provider is deferred.
     *
     * @var bool
     */
    protected $defer = true;

    /**
     * Available services for channels
     *
     * @var array
     */
    protected $availableServices = ['AExtractor', 'ZExtractor'];

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

    /**
     * Register any application services.
     *
     * @return void
     */
    public function register()
    {
        $this->app->call('registerService');
    }

    /**
     * @param Request $request
     * @return void
     */
    protected function registerService(Request $request)
    {
        $tag = DB::table('channels')->where('id', $request->channel)->value('tag')->first()->tag;

        $selectedExtractor = $tag . 'Extractor';
        $extractor = 'AExtractor';

        if(in_array($selectedExtractor, $this->availableServices)) {
            $extractor = $selectedExtractor;
        }

        $this->app->bind('App\Contracts\Extractor', "App\\Helpers\\{$extractor}");
    }

    /**
     * Get the services provided by the provider.
     *
     * @return array
     */
    public function provides()
    {
        return [Extractor::class];
    }
}

How can I use $this->app->call('registerService'); to call my registerService function and inject the Request object?

Moppo · Accepted Answer · 2016-05-11 09:06:04Z

5

The problem is you're calling App:call in a wrong way: you have to specify the object on which you want to call the method and the method, like this :

$this->app->call( [ $this, 'registerService' ] );

edited May 11, 2016 at 9:06

answered May 11, 2016 at 8:57

Moppo

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4 Comments

codedge Over a year ago

Lovely, that works! Now there is problem with the DB facade not found but it finally calls the registerService method. Cheers!

Moppo Over a year ago

@codedge : for the facade probably you have to include use DB; on top of your file

codedge Over a year ago

Yes, that was it! Thanks!

Jason Over a year ago

Additional parameters can be passed to the registerService method by passing an array of parameters to the second argument of call(). The array can be numerically indexed to provide positional arguments, or key/value pairs where the key references an argument name.

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