clrghouz/app/Casts/CollectionOrNull.php

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<?php
namespace App\Casts;
use Illuminate\Contracts\Database\Eloquent\CastsAttributes;
use Illuminate\Support\Collection;
class CollectionOrNull implements CastsAttributes
{
/**
* Cast the given value.
*
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* @param \Illuminate\Database\Eloquent\Model $model
* @param string $key
* @param mixed $value
* @param array $attributes
* @return Collection
*/
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public function get($model,string $key,$value,array $attributes): Collection
{
return collect(json_decode($value, true));
}
/**
* Prepare the given value for storage.
*
* @param Model $model
* @param string $key
* @param mixed $value
* @param array $attributes
* @return string|null
*/
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public function set($model,string $key,$value,array $attributes): ?string
{
return ($value->count()) ? json_encode($value) : NULL;
}
}