/**
* Save a new model and attach it to the parent model.
*
* This makes sure we add the from_field_id to the 'pivot' table
*
* @param \Illuminate\Database\Eloquent\Model $model
* @param array $joining
* @param bool $touch
* @return \Illuminate\Database\Eloquent\Model
*/
public function save(Model $model, array $joining = [], $touch = true)
{
if (empty($joining) && $this->fromFieldId) {
$joining = [static::$fromFieldKey => $this->fromFieldId];
}
return parent::save($model, $joining, $touch);
}