重载属性的间接修改没有效果

Question

当我运行以下 API 时出现此错误

“间接修改重载属性App\User::$attendance无效”。

这么久我还是想不通。请有人帮我解决这个问题。

public function apiPresent( $id, Request $request )
{
    $tokenuser = User::with('attendance')
                    ->where('token', $request->input('token'))->first();
    $present   = $request->input('present');
    $user      = User::with('attendance')->find($id);

    if( $user && $tokenuser == $user )
    {
        $user->attendance->present = $present;
        $user->attendance->date    = Carbon::now()->format('d-m-Y');
        $user->attendance->time    = Carbon::now()->format('H-i');
        $user->attendance->save();

        return response()->json([
                    'status'  => 'Ok',
                    'message' => 'Present Changed',
                    'Present' => $user->attendance->present
        ]);
    }
    else
    {
        return response()->json([
                    'status'  => 'Fail',
                    'message' => 'Your state does not changed'
        ]);
    }
}

Answer 1

我认为问题在于您试图直接分配给App::User 的关系。您的代码段突出显示了这一点：

if( $user && $tokenuser->id == $user->id ){
    $user->attendance->present = $present;
    $user->attendance->date    = Carbon::now()->format('d-m-Y');
    $user->attendance->time    = Carbon::now()->format('H-i');
    $user->attendance->save();
    ...

在 Eloquent 中，您可以使用魔术__get() 方法将关系作为属性访问，该方法返回对象的副本。

当您尝试为任何关系的属性（在本例中为 $user->attendance）分配任何值时，它根本不会对原始对象产生任何影响，因此警告。

您可以通过创建新对象实例并将其添加到create 方法来解决此问题，如下所示：

$attendance = new Attendance();
$attendance->present = $present;
$attendance->date    = Carbon::now()->format('d-m-Y');
$attendance->time    = Carbon::now()->format('H-i');
$user->attendance->create($attendance);

这将使用外键保存新记录。

Answer 2

就我而言

Laravel php 5.7 & Mysql 5.7 我为以下代码得到的错误是 间接修改重载属性 Illuminate\Http\Request::${

错误代码

 $config->name = $request->title;
        $config->lead_by_id = $request->owner;
        $config->tech_stack = $request->stack;
        $config->is_POC = $request->
        $config->updated_by = $request->
        $config->start_date = $request->start_date;
        $config->end_date = $request->end_date;

然后我发现我没有正确设置请求变量

修复

 $config->name = $request->title;
        $config->lead_by_id = $request->owner;
        $config->tech_stack = $request->stack;
        $config->is_POC = $request->poc;
        $config->updated_by = $request->$user->id;
        $config->start_date = $request->start_date;
        $config->end_date = $request->end_date;

Answer 3

如果我了解您的问题。您正在保存出勤率。

试试这个：

use App\Attendance; // Add before controller declaration

public function apiPresent( $id, Request $request )
{
    $tokenuser = User::where('token', $request->input('token'))->first();
    $present   = $request->input('present');
    $user      = User::find($id);

    if( $user && $tokenuser->id == $user->id ){
        $attendance = new Attendance;
        $attendance->present = $present;
        $attendance->date    = Carbon::now()->format('d-m-Y');
        $attendance->time    = Carbon::now()->format('H-i');
        $attendance->save();

        return response()->json([
                'status'  => 'Ok',
                'message' => 'Present Changed',
                'Present' => $present
       ]);
    }
    else {
        return response()->json([
                'status'  => 'Fail',
                'message' => 'Your state does not changed'
       ]);
    }
}

希望对你有帮助！