public function store(Request $request)
{
$request->parent_id = empty($request->parent_id) ? 1 : $request->parent_id;
$messages = ['name.required' => '分类名不能为空'];
$this->validate($request, ['name' => 'required'], $messages);
Display::create(['name' => $request->name, 'parent_id' => $request->parent_id]);
Session()->flash('status', 'display create was successful!');
return redirect('/admin/display');
}
