Temporary relationship trait for Laravel

1923784f-028d-45d1-924e-16fcb12ce38c.php

<?php

namespace App\Models\Traits;

trait TemporaryRelationships
{
    /**
     * Returns the value of the given relationship from the current model.
     *
     * If the relation is already loaded, it is returned directly.
     *
     * If the relation is not loaded, it is loaded, then removed
     * from the list of loaded relations, and then returned.
     *
     * The function is memoized so accessing the same temporary
     * relation within a request will only make one query.
     */
    public function temporary(string $relation)
    {
        return once(function () use ($relation) {
            if ($this->relationLoaded($relation)) {
                return $this->{$relation};
            }

            $relationValue = $this->getRelationValue($relation);
            $this->unsetRelation($relation);

            return $relationValue;
        });
    }
}

363a31e8-d3c4-45af-9d3f-9d51dd629325.php

<?php

namespace App\Models;

use App\Models\Traits\TemporaryRelations;
use Illuminate\Database\Eloquent\Model;

class Post extends Model
{
    use TemporaryRelations;

    public function someMethod()
    {
        return $this->temporary('author');
    }

    public function author()
    {
        return $this->belongsTo(User::class);
    }
}