ConvertEmptyStringsToNullTrait.php

<?php

namespace App\Http\Livewire\Traits;

use Illuminate\Support\Str;

trait ConvertEmptyStringsToNull
{
    public function updatedConvertEmptyStringsToNull(string $name, mixed $value): void
    {
        if (! $this->shouldConvertValue($value, $name)) {
            return;
        }
        $value = trim($value);
        $value = $value === '' ? null : $value;

        if (Str::of($name)->contains('.')) {
            $nestedTargetName   = Str::of($name)->beforeLast('.');
            $nestedPropertyName = Str::of($name)->afterLast('.');

            $nested = data_get($this, $nestedTargetName);

            data_set($nested, $nestedPropertyName, $value);
            data_set($this, $nestedTargetName, $nested);

            return;
        }

        data_set($this, $name, $value);
    }
    
    protected function shouldConvertValue(mixed $value, string $name): bool
    {
        return
            is_string($value)
            && (
                ! property_exists($this, 'convertEmptyStringsExcept')
                || ! in_array($name, $this->convertEmptyStringsExcept)
            );
    } 
}