[php] Laravel, sync() - how to sync an array and also pass additional pivot fields?

Add following trait to your project and append it to your model class as a trait. This is helpful, because this adds functionality to use multiple pivots. Probably someone can clean this up a little and improve on it ;)

namespace App\Traits;

trait AppTraits
{
    /**
     * Create pivot array from given values
     *
     * @param array $entities
     * @param array $pivots
     * @return array combined $pivots
     */
    public function combinePivot($entities, $pivots = [])
    {
        // Set array
        $pivotArray = [];
        // Loop through all pivot attributes
        foreach ($pivots as $pivot => $value) {
            // Combine them to pivot array
            $pivotArray += [$pivot => $value];
        }
        // Get the total of arrays we need to fill
        $total = count($entities);
        // Make filler array
        $filler = array_fill(0, $total, $pivotArray);
        // Combine and return filler pivot array with data
        return array_combine($entities, $filler);
    }
}

Model:

namespace App;

use Illuminate\Database\Eloquent\Model;

class Example extends Model
{
    use Traits\AppTraits;
    // ...
}

Usage:

// Get id's
$entities = [1, 2, 3];
// Create pivots
$pivots = [
    'price' => 634,
    'name'  => 'Example name',
];
// Combine the ids and pivots
$combination = $model->combinePivot($entities, $pivots);
// Sync the combination with the related model / pivot
$model->relation()->sync($combination);

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