Laravel Livewire error when I add a constructor to call a service class

user_1883256 0
Viewed 2328

I've got a piece of code I want to reuse. I've read this Laravel cleaner code article and this other Laravel Services Pattern article, where I have realized I can reuse code in several places of the application by using services classes.

In this case, I created a new MyService class, inside a new folder app/Services/MyService.

namespace App\Services;

class MyService
{
    public function reuse_code($param){
       return void;
    }
}

The problem comes when I want to call the class through the constructor inside a Livewire class component, as follows:

<?php

namespace App\Http\Livewire;

use App\Services\MyService;
use Livewire\Component;
use Livewire\WithPagination;

class LivewireTable extends Component
{
    use WithPagination;

    private $myClassService;

    public function __construct(MyService $myService)
    {
        $this->myClassService = $myService;
    }

    public function render()
    {
       $foo = $this->myClassService->reuse_code($param);
       return view('my.view',compact('foo'));
    }
}

The error displayed is the following:

Argument 1 passed to App\Http\Livewire\LivewireTable::__construct() must be an instance of App\Services\MyService, string given

(However, If I use a trait, there are no problems. But I am afraid then my traits collide as previous experiences)

How do I fix it? What am I missing?

laravel-livewire laravel
2 Answers

Livewire's boot method Runs on every request, immediately after the component is instantiated, but before any other lifecycle methods are called

Here's the solution worked for me.

enter image description here

user_38805160

Solved Just like @IGP said, reading in the livewire docs it says:

In Livewire components, you use mount() instead of a class constructor __construct() like you may be used to.

So, my working code is as follows:

    <?php
    
    namespace App\Http\Livewire;
    
    use App\Services\MyService;
    use Livewire\Component;
    use Livewire\WithPagination;
    
    class LivewireTable extends Component
    {
        use WithPagination;
    
        private $myClassService;
    
        public function mount(MyService $myService)
        {
            $this->myClassService = $myService;
        }
    
        public function render()
        {
           $foo = $this->myClassService->reuse_code($param);
           return view('my.view',compact('foo'));
        }
    }
user_18832560
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