2.4.7 Empty headline is still output in the template

Contao 4.13.37 PHP8.2

Since 2.4.7 empty headlines are displayed in the frontend despite a query in the template.

I was debugging this for the past few minutes and this is because $this->headline is now of type Stringable and not empty in if-clauses anymore.

This is being caused in the last change:

contao-rocksolid-custom-elements/src/Element/CustomElement.php

Lines 301 to 315 in c69bf39

    
           $this->Template->headline = new class($this->Template->headline, $this->Template->hl) implements \Stringable 
        
           { 
        
           	public ?string $text; 
        
           	public ?string $tag_name; 
        
           	public function __construct(?string $text, ?string $tag_name) 
        
           	{ 
        
           		$this->text = $text; 
        
           		$this->tag_name = $tag_name; 
        
           	} 
        
           	public function __toString(): string 
        
           	{ 
        
           		return $this->text ?? ''; 
        
           	}

The question is if this should be fixed from your side @ausi or if every person using custom-elements would need to update their templates after updating to version 2.4.7.

We'd all either need to use <?php if ((string) $this->headline): ?> or there should be a workaround.

I consider this critical since updates would lead to something that may output empty headlines like here:

<div class="ce_rsce_text col-m-6 text block">
	<div class="inside">
		<div class="c_headline">
			<h1></h1>
		</div>
		<div class="c_text">…</div>
	</div>
</div>

A possible solution would be using the ParseTemplateListener as it only renders html templates

namespace App\EventListener;

use Contao\CoreBundle\DependencyInjection\Attribute\AsHook;
use Contao\Template;

#[AsHook('parseTemplate')]
class ParseTemplateListener
{
    public function __invoke(Template $template): void
    {
        // Cast stringable to string (See #166)
        $template->headline = (string) $template->headline;
    }
}

@Ainschy can you please try if the latest dev-master version fixes your issue?

Thanks it's look fine for me

Released as version 2.4.8

@Ainschy @zoglo thank you for the quick reporting/debugging/testing!

	$this->Template->headline = new class($this->Template->headline, $this->Template->hl) implements \Stringable
	{
	public ?string $text;
	public ?string $tag_name;

	public function __construct(?string $text, ?string $tag_name)
	{
	$this->text = $text;
	$this->tag_name = $tag_name;
	}

	public function __toString(): string
	{
	return $this->text ?? '';
	}