实现laravel 插入操作日志到数据库的方法

<?phpnamespace App/Http/Middleware;use App/User;use Closure;use Illuminate/Support/Facades/Auth;class OperationLog{  /**   * Handle an incoming request.   *   * @param /Illuminate/Http/Request $request   * @param /Closure $next   * @return mixed   */  public function handle($request, Closure $next)  {    $input = $request->all(); //操作的内容    $path = $request->path(); //操作的路由    $method = $request->method(); //操作的方法    $ip = $request->ip(); //操作的IP    $usernum = $request->usernum; //操作人(要自己获取)    self::writeLog($usernum,$input,$path,$method,$ip);    return $next($request);  }  public function writeLog($usernum,$input,$path,$method,$ip){    $user = User::where('usernum',$usernum)->first();    if($user) {      $user_id = $user->userid;    }    $log = new /App/Models/OperationLog();    $log->setAttribute('user_id', $user_id);    $log->setAttribute('path', $path);    $log->setAttribute('method', $method);    $log->setAttribute('ip', $ip);    $log->setAttribute('input', json_encode($input, JSON_UNESCAPED_UNICODE));    $log->save();  }}

<?phpnamespace App/Models;use Illuminate/Database/Eloquent/Model;class OperationLog extends Model{  //定义表  protected $table = "operation_log";  //定义主键  protected $primaryKey = "id";}

/** * The application's global HTTP middleware stack. * * 这些中间件是在对应用程序的每次请求中运行的 * * @var array */protected $middleware = [    .......,    .......,    .......,    /App/Http/Middleware/OperationLog::class,  ];