Laravel Media Gallary Function not Working

This is my first question on stack.Here my question is i have function saveMedia, On this function i have save media Images and also set flag is_banner_image or is_thumb_image.When i upload two images and set one image as thumb image it update on table both images as thumb_image. I have added my Controller function here..

public function saveMedia(Request $request) {
    $albumId = $request->album_id;

    try {
        $gallery = Gallery::findOrFail($albumId);
        $media = $gallery->media()->findOrNew($request->id);
        $media->fill($request->all());

        if($request->is_banner_image) { // true or false
            $media->setBannerImage();
        } else {
            $request->is_banner_image = false;
        }

        if($request->is_thumb_image) { // true or false
            $media->setThumbImage();
        } else {
            $request->is_thumb_image = false;
        }

        if($media->save()) {
            return response()->json([
                'id' => $media->id,
                'message' => 'Media saved successfully'
            ]);
        } else {
            return response()->json([
                'message' => 'Unable to save media!!'
            ]);
        }
    } catch (\Exception $ex) {
        return response()->json([
            'message' => 'Unable to save media!!'
        ]);
    }
}

My Model Query function for both thumb image and banner image :

public function setBannerImage() {
    try {
        DB::table('media')
            ->whereIn('gallery_id', $this->gallery->source->gallery->modelKeys())
            ->update(['is_banner_image' => 0]);
        $this->is_banner_image = 1;
    } catch (\Exception $ex) {
        echo $ex->getMessage();
        dd($ex->getTraceAsString());
    }
}

public function setThumbImage() {
    DB::table('media')->
        whereIn('gallery_id', $this->gallery->source->gallery->modelKeys())->
        update(['is_thumb_image' => 0]);
    $this->is_thumb_image = 1;
}

I want to update only one at a time.Thanx in advance.

via Chebli Mohamed