laravel 7中出现“不允许“序列化”关闭序列化”的错误

Question

在我的laravel 7最新项目中，我将使用$landDataArr->save()保存一些表单发布数据。不幸的是，我收到“不允许序列化“关闭”的错误。

我的控制器：

public function store(Request $request)
    {
        $formData = $request->all();
        DB::beginTransaction();
        try {
            $landDataArr = new Land([
                'dist' => $request->get('dist'),
                'upa' => $request->get('upa'),
                'mouja' => $request->get('mouja'),
                'khotiyan' => $request->get('khotiyan'),
                'dag_no' => $request->get('dag_no'),
                'lnd_size' => $request->get('lnd_size'),
                'lnd_cat' => $request->get('lnd_cat'),
                'case_no' => '001',
                'created_by' => Auth::user('id'),
            ]);
            $landDataArr->save();
            DB::commit();
            return redirect('/land')->with('success', 'New Data added successfully');
        } catch (\Exception $exception) {
            DB::rollback();
            $request->session()->flash('errors', $exception);
        }
    }

可能是我缺少了一些东西。请帮助..谢谢