前端API返回问题

返回

public function getCourse(){
        try {
            $model = app()->make(Classify::class);
            $coursewareModel = app()->make(Courseware::class);
            $lists = $model->where('pid','=',0)->order(['weigh' => 'desc','id' => 'desc'])
                ->select()
                ->toArray();
            $baseUrl = $this->request->domain();
            foreach($lists as &$val){
                $val['image'] = $baseUrl.$val['image'];
                $courseware = $coursewareModel
                    ->where('classify_id','in',getSubordinateIds($val['id']))
                    ->limit(4)
                    ->select()
                    ->toArray();
                foreach ($courseware as $item){
                    $item['image'] = $baseUrl.$val['image'];
                }
                $val['courseware'] = $courseware;
            }

            var_dump($lists);

            $this->success('获取成功',$lists);
        }catch (\Exception | \Throwable $exception){
            $this->error($exception->getMessage().'==='.$exception->getLine().'==='.$exception->getFile());
        }
    }