Question

当我调用此API时，我收到此错误“此集合实例上不存在Property [date]。”

这是我的API代码。

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

        if($user && $tokenuser == $user){
            return response()->json([
                'MacAddress' => $user->mac_address,
                'SerialNo'=>$user->serial_no,
                'Date' => $user->attendance->date,
                'Time' => $user->attendance->time,
                'Present' => $user->attendance->present
            ]);
        }
        return response()->json([
            'status' => 'Fail',
            'message' => 'You dont have access to see this user.'
        ]);
    }

Answer 1

由于用户有很多人，'Date' => $user->attendance->first()->date, 'Time' => $user->attendance->first()->time, 'Present' => $user->attendance->first()->present是一个集合，而不是一个对象。因此，您可能希望迭代它和所有出席日期等。或者您可以使用first()收集方法从集合中的第一次出席中获取数据：

u32_t d = (foo >> 24) & 0xFF; // Get the bits 32nd...25th
u32_t c = (foo >> 16) & 0xFF; // 24th...17th
u32_t b = (foo >> 8) & 0xFF;  // 16th...9th
u32_t a = (foo) & 0xFF;       // 8th...1st

此集合实例上不存在属性[date]。当我调用API时

1 个答案: