Question

我在视图中设置了两个日期选择器;一个用于开始日期，一个用于结束日期。请求将传递给控制器索引方法，在该方法中，它与此if块进行交互。

如果我设置了开始日期，例如1st of April，我希望：

$start_date == 2017-04-01 00:00:00
$end_date == 2017-04-08 00:00:00（一周之后）

但是当我在阻止后运行dd($start_time.' '.$end_time)时，它会返回

2017-04-08 00:00:00 2017-04-08 00:00:00

    // If start or end date is not passed, set the bookings to view the upcoming week
    if (isset($request->start_date) && isset($request->end_date))
    {
        $start_date = Carbon::parse($request->start_date);
        $end_date = Carbon::parse($request->end_date);
        if ($start_date->diffInDays($end_date, false) < 1 )
        {
            return redirect()->route('bookings.index')->with('errors', 'Please choose an end date <strong>after</strong> start date!');
        }

    }
    else if (isset($request->start_date))
    {
        $start_date = Carbon::parse($request->start_date);
        $end_date = $start_date->addWeek();
    }
    else if (isset($request->end_date))
    {
        $end_date = Carbon::parse($request->end_date);
        $start_date = ($end_date->subWeek());
    }
    else
    {
        $start_date = Carbon::now();
        $end_date = Carbon::now()->addweek();
    }

这可能会发生什么？

Answer 1

代码中出现问题是因为 Carbon对象是可变的。

这基本上意味着当您$end_date = $start_date->addWeek();时，start_date和end_date都是相同的对象。

所以你可以clone start_date到end_date，然后再调用方法。

解决方案应为

   // If start or end date is not passed, set the bookings to view the upcoming week
    if (isset($request->start_date) && isset($request->end_date))
    {
        $start_date = Carbon::parse($request->start_date);
        $end_date = Carbon::parse($request->end_date);
        if ($start_date->diffInDays($end_date, false) < 1 )
        {
            return redirect()->route('bookings.index')->with('errors', 'Please choose an end date <strong>after</strong> start date!');
        }

    }
    else if (isset($request->start_date))
    {
        $start_date = Carbon::parse($request->start_date);
        $end_date = clone $start_date;
        $end_date = $end_date->addWeek();
    }
    else if (isset($request->end_date))
    {
        $end_date = Carbon::parse($request->end_date);
        $start_date= clone $end_date;
        $start_date= $start_date->subWeek();
    }
    else
    {
        $start_date = Carbon::now();
        $end_date = Carbon::now()->addweek();
    }

未分配变量的碳分配

1 个答案: