错误：创建或保存数据时试图获取非对象的属性

Posted 2023-03-14

【中文标题】错误：创建或保存数据时试图获取非对象的属性

【英文标题】：Error: Trying to get property of non-object when creating or saving data

【发布时间】：2019-03-23 21:50:26

【问题描述】：

"试图获取非对象的属性"

型号

新建数据要保存时，出现如上错误

public static function findOrCreate($plan_id, $data)

    $fromDate = Carbon::now()->subDay()->startOfWeek();
    $nowDate = Carbon::now()->today();

    $spent_time = static::where('plan_id', $plan_id)->first();

    if (is_null($spent_time)) 
        return static::create($data);
    else
        $new_spent_time = SpentTime::find($plan_id);
        $task_category = $new_spent_time->task_category;

        $new_spent_time->task_category = (['task_category' => $task_category, 
                                        'daily_spent_time' => $new_spent_time->daily_spent_time,
                                        'daily_percentage' => $new_spent_time->daily_percentage,
                                        'spent_time' => $new_spent_time->spent_time,
                                        'percentage' => $new_spent_time->percentage, $new_spent_time->task_category]);

        $new_spent_time->spent_time = $new_spent_time::where('task_category',$task_category)
                                    ->sum('daily_spent_time', $new_spent_time->daily_spent_time , $fromDate);
        $request['spent_time'] = (int)$new_spent_time->spent_time + $spent_time->daily_spent_time;

        $new_spent_time->percentage = $new_spent_time::where('task_category',$task_category)
                                    ->sum('daily_percentage', $new_spent_time->daily_percentage, $fromDate);
        $request['percentage'] = (int)$new_spent_time->percentage  + $spent_time->daily_percentage;
        $new_spent_time->save();

        return $spent_time->update($data);
    

【参考方案1】：

"Trying to get property of non-object" 表示该属性不存在

将您的 find 更改为 findOrFail

$new_spent_time = SpentTime::findOrFail($plan_id);

这样，laravel 在数据库中找不到记录时会返回错误。

另一种方法是检查您的查询是否成功：

$new_spent_time = SpentTime::find($plan_id);
if($new_spent_time)

    $task_category = $new_spent_time->task_category;

    $new_spent_time->task_category = (['task_category' => $task_category, 
                                    'daily_spent_time' => $new_spent_time->daily_spent_time,
                                    'daily_percentage' => $new_spent_time->daily_percentage,
                                    'spent_time' => $new_spent_time->spent_time,
                                    'percentage' => $new_spent_time->percentage, $new_spent_time->task_category]);

    $new_spent_time->spent_time = $new_spent_time::where('task_category',$task_category)
                                ->sum('daily_spent_time', $new_spent_time->daily_spent_time , $fromDate);
    $request['spent_time'] = (int)$new_spent_time->spent_time + $spent_time->daily_spent_time;

    $new_spent_time->percentage = $new_spent_time::where('task_category',$task_category)
                                ->sum('daily_percentage', $new_spent_time->daily_percentage, $fromDate);
    $request['percentage'] = (int)$new_spent_time->percentage  + $spent_time->daily_percentage;
    $new_spent_time->save();

    return $spent_time->update($data);
else
    return 'no result found';

【讨论】：

但是，找不到页面。还有其他解决方案吗？

保存时创建具有相同类别的新数据。

这意味着 laravel 在你的数据库中没有找到任何记录。尝试返回 $plan_id 并查看它返回的数据，然后在您的数据库中比较它，如果 id 确实存在。

如果使用 $new_spent_time = SpentTime::findorfail($plan_id);，则找不到页面。但如果使用 $new_spent_time = SpentTime::get();像这样的错误“此集合实例上不存在属性 [task_category]。”

Route::resource('/real', 'TrackerController');

【参考方案2】：

应该是在存储的时候创建的数据会去表单计算数据量