', -1)->orderBy('display_order')->get(); } public function getAdvertisementById($advertisementId) { return Advertisement::where('advertisement_id', $advertisementId)->first(); } public function delete($advertisementId) { return Advertisement::where('advertisement_id', $advertisementId)->delete(); } public function create(array $newData) { return Advertisement::create($newData); } public function update($advertisementId, array $newDetails) { return Advertisement::where('advertisement_id', $advertisementId)->update($newDetails); } }