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Hello! :)
I'm using Plesk, and I've deployed a new Laravel application.
From the Laravel toolkit, I run the command php artisan make:component sidebarnominativi.
So far, so good. It creates the controller in app/View/Components/sidebarnominativi.php and the blade file in resources/views/components/sidebarnominativi.blade.php.
I open the controller and create a simple function that passes the variable $nominativi:
public function render(): View|Closure|string
{
$nominativi = "prova";
return view('components.sidebarnominativi', compact('nominativi'));
}
I call it in the blade:
<div>
{{ $nominativi }}
</div>
I insert my component in resources/views/welcome.blade.php like this:
<x-sidebarnominativi />
The result is that when I visit the project's homepage, I receive the error:
Undefined variable $nominativi (View: myserverpath/resources/views/components/sidebarnominativi.blade.php)
Below are all the environment details:
I've already tried the following commands:
php artisan view:cache
php artisan view:clear
composer update
composer install
composer dump
None of these commands generate any errors, and they are not resolving the issue.
I've also tried changing the framework version to v10.39.0.
Has anyone ever encountered this issue before?
If this is a Blade component, you should make a public property on the class (e.g. public string $nominativi;) which will then be made available to the view without you having to pass it in.
Then in your render() function, you would do $this->nominativi = 'prova'; and in your view, you can just use {{ $nominativi }} (without the $this-> part).
@nexxai thanks for the answer!
Do you mean something like this?
<?php
namespace App\View\Components;
use Closure;
use Illuminate\Contracts\View\View;
use Illuminate\View\Component;
class SidebarNominativi extends Component
{
public $nominativi;
/**
* Create a new component instance.
*/
public function __construct($nominativi)
{
$this->nominativi = "test";
}
/**
* Get the view / contents that represent the component.
*/
public function render(): View|Closure|string
{
return view('components.sidebar-nominativi');
}
}
I tried to modify the class like this but it still gives me the same error: Undefined variable $nominativi.
The curious thing is that it seems like the controller of the sidebar is completely ignored.
For example, if I insert the dd() function inside the render method, this should "interrupt" the page loading and show me the content of dd. In my case, I'm using dd('prova'). However, it doesn't consider it and continues to return: "Undefined variable $nominativi".
Furthermore, if I completely remove the content of the controller app/View/Components/SidebarNominativi.php, Laravel instead of generating the error "Class "App\View\Components\SidebarNominativi" not found" (as it should), continues to tell me Undefined variable $nominativi.
Have you ever encountered a similar issue?
@eliamarsu That is very weird. How are you calling this component? From within a different Blade component? A full page blade route? A Livewire component?
@nexxai It's very strange, I've already created a couple of applications on the same machine but had never encountered this behavior before :/
I call this component inside resources/views/welcome.blade.php. In this way, as usual:
<x-sidebarnominativi />
@eliamarsu I know this sounds weird, but can you try using <x-sidebar-nominativi /> (adding a dash between the two words)? I feel like if it's not there, strange stuff happens with Laravel trying to resolve the class name correctly.
@nexxai I tried to change in <x-sidebar-nominativi /> and now, understandably, laravel can't locate the class or view.
Unable to locate a class or view for component [sidebar-nominativi].
The url is testlar.digiti.eu
@eliamarsu It's definitely not understandable that Laravel can't find it.
From the docs (emphasis mine):
Blade component tags start with the string x- followed by the kebab case name of the component class
So they definitely need to be referenced in kebab-case.
The next thing is that I'm just realizing that in your constructor, the property isn't being promoted, which I've seen cause problems, so remove the public $nominativi; and set everything in the constructor:
public function __construct(public string $nominativi) // <- make sure to add "public" here
{
$this->nominativi = "test";
}
Finally, you are doing return view('components.sidebar-nominativi'); but your blade's file name is sidebarnominativi.blade.php (without the dash in the middle). Can you make sure those match and fix either the file name or what you're returning?
Thanks for your patience :)
This is my actual configuration:
Controller:
user@server:~/public_html$ cat app/View/Components/sidebarnominativi.php
<?php
namespace App\View\Components;
use Closure;
use Illuminate\Contracts\View\View;
use Illuminate\View\Component;
class sidebarnominativi extends Component
{
public $nominativi;
public function __construct(public string $nominativi)
{
$this->nominativi = "test";
}
public function render(): View|Closure|string
{
return view('components.sidebarnominativi');
}
}
Welcome blade:
user@server:~/public_html$ cat resources/views/welcome.blade.php
<x-sidebarnominativi/>
Blade's component:
user@server:~/public_html$ cat resources/views/components/sidebarnominativi.blade.php
<div>
{{ $nominativi }}
</div>
I've carefully reviewed everything multiple times, but I can't find any errors.
Do you notice anything wrong?
@nexxai I understood the problem... and frankly, I consider it a "nuisance" because in my local environment (Docker - Sail), this issue didn't arise, whereas when deploying the application to a Plesk server or a LEMP server in the production environment, I'm not sure why it occurred (and I would really like to understand).
In any case, the problem was due to the capitalization in the component name.
It seems absurd to me, but by renaming:
app/View/Components/sidebarnominativi.php to app/View/Components/SidebarNominativi.php
and
resources/views/components/sidebarNominativi.blade.php to resources/views/components/SidebarNominativi.blade.php
Everything works... simple as that.
So, when I run the command:
php artisan make:component Sidebar
I need to remember to use the first letter capitalized... I find it strange, frankly. But since it works, I'll do it.
In my local environment (deployed following https://laravel.com/docs/11.x/installation#sail-on-windows), everything works perfectly without this precaution.
However, when I brought the project to Plesk or a LEMP server and deployed it there... boom, the component controllers were ignored, and "undefined variable" errors started popping up.
Are there any server-side settings that can be modified to avoid this behavior, or is there a logic behind it that I'm missing?
I can't find any references about this in the documentation.
@eliamarsu I don't believe there are any settings you should need to configure; I'm more confused as to why it ever worked (even partially) in the first place. Capitalization (both in class names and file names) is really important because of the functions Laravel uses to convert various cases (e.g. PascalCase to KebabCase) and so when things aren't named correctly, it will definitely throw things off.
To mark an answer as correct, you just hover over the post that was correct (or most correct) and at the bottom, a button should appear that says "Set Best Answer"
Anyway, thanks @nexxai for the support!
What should I do to mark the post as solved?
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