此集合实例上不存在属性 [task_category]答案

【问题标题】：Property [task_category] does not exist on this collection instance此集合实例上不存在属性 [task_category]
【发布时间】：2019-03-23 22:57:10
【问题描述】：

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Laravel 中的模型

“此集合实例上不存在属性 [task_category]。”

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::get();
    $new_spent_time->task_category = (['{task_category}' => $new_spent_time->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;
        return $spent_time->update($data);
    }
}

【问题讨论】：

您的spenttime 表迁移中有task_category 字段吗？
@thisiskelvin 是的，当然
您的SpentTime::get() 函数的用途是什么？是为了获得一审吗？创建一个新的？如果要获得第一个，请使用::first()。
@thisiskelvin 谢谢，但还有一个问题，保存创建新数据时，无法计算具有相同类别的数据，我寻求帮助。拜托，你可以看到链接stackoverflow.com/questions/52865862/…
stackoverflow.com/questions/52884984/…

标签： php laravel sum laravel-query-builder laravel-5.7

【解决方案1】：

我通过使用first() 而不是get() 解决了这个问题：

$new_spent_time = SpentTime::first();

【讨论】：

【解决方案2】：

型号

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::first();
        $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);
        $new_spent_time['spent_time'] = (int)$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);
        $new_spent_time['percentage'] = (int)$new_spent_time->percentage  + $spent_time->daily_percentage;

        return $spent_time->update($data);
    }
}

【讨论】：