无法从 Laravel eloquent 关系数组中获取数据

Question

对于$response，我有一个如下所示的数组。我想单独获取user 字段和位于user 内的files 字段。我试过$response['user'] & $response['user']['files']，它显示错误undefined index。我怎样才能做到这一点？

[
    {
        "id": 14,
        "userId": 1,
        "courseDisplayName": "yuu",
        "aboutCourse": "kljkl",
        "user": {
            "id": 1,
            "name": "admin",
            "profilePicId": 93,
            "aboutUser": null,
            "files": {
                "id": 93,
                "FilePath": "contentq/contentqFiles/XwyC6JHK5T/Account.png"
            }
        },
        "files": null
    }
]

我在这里尝试做的是，输入couresId 是类似[14,15] 的数组，所以对于数组中的每个项目，我想从Course、user 和files 表中获取数据，其中Course 表的id 具有输入中的值，course 表的userId 具有user 表中的id 值和course 表的fileId 具有files 表中 id 的值。属性user & files 在Course 模型中定义。

$response=null;
foreach($request->courseId as $key => $row){
$response[] = Course::with([
        'user' => function($q)
         {
              $q->with('files:id,FilePath')->select('id', 'name' , 'profilePicId','aboutUser');
         },'files:id,FilePath']) 
            ->where('id',$row)
           ->get()
     ->makeHidden(['subjectId','skillId','courseUniqueName','active','created_at','updated_at','deleted_at','publish','course_patterns_id','paid_status','fileId','updatedBy']);
  }

**EDIT**

//$res=[];
 foreach($response as $row){
            
  $res['user'] = $row->user;  // error- Property [user] does not exist on this collection instance  
  $res['user'] = $row->first()->user;// works , but it will show only 1 set of data. i wanted all sets of data.   
} 

Answer 1

$response 是一个数组或数组的集合。你不能访问 $response['user'] 而不循环它。要么调用 $response->first() 要么做一个 foreach 循环遍历 $response

方式一：

    $user = $response->first()->user;
    $files = $response->first()->files;

方式二：

    foreach($response as $row){
        $user = $row->user;
        $files = $row->files;
       // use dd() these to see what you get
    }