小编Man*_*ath的帖子

HTTP状态代码"0"无效.

public function filter()
{
$institute = (new Institute)->newQuery();
$institute->with(['locations','courses' =>  function ($query) use ($request){
            $query->with('trainers');
        }]);
}
$data = $institute->get();
if(count($data) > 0)
{
    return response()->json($data);
}
else
{
    return response()->json(404,'No Data found');
}
}

实际上,如果没有数据,我想显示错误404消息,

我的问题是,当我尝试检查数据是否存在时,我收到一个名为InvalidArgumentException的错误.请任何人帮忙.

What is Bootstrapping in Laravel and how does it work?