/**
* Update the specified resource in storage.
*
* @param Request $request
* @param int $id
* @return Response
*/
public function update(Request $request, Image $image)
{
$image->update($request->except('_method', '_token', 'artist_list', 'piece_list'));
$pieces = count($request->input('piece_list')) ? $request->input('piece_list') : [];
$artists = count($request->input('artist_list')) ? $request->input('artist_list') : [];
$image->pieces()->sync($pieces);
$image->artists()->sync($artists);
return redirect()->route('admin.images.show', $image->id)->with('message', 'Image updated');
}