manyToMany

/**
 * PACKAGE CONTROLLER
 * code attach
 */

$weddingPackage->weddingServices()->attach(
    $request->services,
    [
        'qty' => $request->qty,
        'total' => $request->hargaService
    ]
);

/**
 * Model Package
 */

public function weddingServices()
{
    return $this->belongsToMany(WeddingService::class, 'wed_pack_serv', 'wed_pack_id', 'wed_serv_id')->withPivot(['qty', 'total']);
}

/**
 * Model service
 */

public function weddingPackages()
{
    return $this->belongsToMany(WeddingPackage::class, 'wed_pack_serv', 'wed_pack_id', 'wed_serv_id')->withPivot(['qty', 'total']);
}