Laravel Virgin: Inject a Model In Controller as Dependency - php

Question

In my inherited code in the Models there's some serious logic and I want to use the Laravel's Dependency Injection in order to load the models as Dependencies into the controller instead of Using the Laravel's provided Facades.
So here's a sample Controller:
namespace App\Http\Controllers;
use App\User;
use App\Http\Controllers\Controller;
class UserController extends Controller
{
/**
* Show the profile for the given user.
*
* #param int $id
* #return View
*/
public function show($id)
{
return view('user.profile', ['user' => User::findOrFail($id)]);
}
}
But Instead of using the Facade User I want to be able to load it as dependency into the controller:
namespace App\Http\Controllers;
use App\User;
use App\Http\Controllers\Controller;
user App\Models\User
class UserController extends Controller
{
/**
* #var User
*/
private $user=null;
public function __construct(User $user)
{
$this->user=$user;
}
/**
* Show the profile for the given user.
*
* #param int $id
* #return View
*/
public function show($id)
{
return view('user.profile', ['user' => $this->user->findOrFail($id)]);
}
}
The reason why I want to do that is because I come from Symfony Background where the Dependency Injection Pattern Is heavily Erdosed. Also Dependency Injection is the Unit Test's best buddy, so I want to be able to unitilize the Dependency Injection that I am familiar with.
So I wanted to know whether I can inject the models where the logic exists in the Controllers Instead of using the Facade Pattern provided by laravel.

Answer 1

When you register your route, you can use the model binding:
// routes/web.php
Route::get('users/{user}', 'UserController#show');
Then in your controller, you can change your method to:
public function show(User $user)
{
//
}
Where the $user will be the instance of App\User with the right id. For example, if the url is /users/1, the $user will contain the App\User with id 1.
For more information: https://laravel.com/docs/5.8/routing#route-model-binding