foreach循环后如何返回集合或者数组数据来查看？

Question

上下文：我正在尝试计算员工在约会中工作的总小时数，并在刀片视图中按员工显示总小时数。我可以成功地总结每个 $EmployeeHours 的 $starts_at 减去 $ends_at 日期的小时数。但是当我 dd(); 时我只看到最后一个对象，而不是集合。

当我尝试发送数据以在 @foreach 循环中查看时，出现错误：

array_merge()：参数 #2 不是数组

当我保存到数据库中的表时，它成功地迭代并保存我期望的每个 $EmployeeHours。

问题是我不想将查询结果保存到数据库，我只想显示到刀片，因为它只是要提取的用户报告的查询。

$EmployeeHours = DB::table('appointment_employee')
        ->join('appointments', 'appointment_id', '=', 'appointments.id')
        ->join('employees', 'employees.id', '=', 'appointment_employee.employee_id')
        ->join('users', 'users.id', '=', 'employees.user_id')
        ->where('role_id', '=', '1')
        ->get()->groupby('id');

        $results=[];
        foreach($EmployeeHours as $EmployeeHour)
        {

                $duration = [];

                foreach($EmployeeHour as $collection) 
                {

                $date1      = $collection->starts_at; 
                $date2      = $collection->ends_at;

                $start      = Carbon::parse($date1);
                $end        = Carbon::parse($date2);

                $length     = $start->diffInMinutes($end)/60;
                $duration[] = $length;  

                }

                $totalHours = array_sum($duration);         

//I think here is where I am going wrong possibly
            $results = [
            'totalHours' => $totalHours,                
            'employee_name' => $collection->first_name. " ".$collection->last_name,                     
            ];  


        }   
            dd($EmployeeHour);  


        return view ('admin.invoices.reporting.employeeHours',$results);

这是刀片视图

@foreach($results as $result)
                        <tr>
                            <td>{{ $result->employee_name }}</td>
                            <td>{{ $result->totalHours }}</td>
                        </tr>
                    @endforeach 

我也尝试过在 Blade 中不使用 foreach 循环，它返回最后一个对象 i,e 。

<tbody>                     
                        <tr>
                            <td>{{ $employee_name }}</td>
                            <td>{{ $totalHours }}</td>
                        </tr>                           
                    </tbody>

Answer 1

有两件事对我来说很突出......

1. 您正在替换

   $results

   而不是附加到它。
2. 您的视图数据被错误地传递到视图。

尝试：

$results = [];
foreach ($EmployeeHours as $EmployeeHour) {
    $duration = [];
    $name = null;

    foreach ($EmployeeHour as $collection) {
        $date1      = $collection->starts_at;
        $date2      = $collection->ends_at;

        $start      = Carbon::parse($date1);
        $end        = Carbon::parse($date2);

        $length     = $start->diffInMinutes($end)/60;
        $duration[] = $length;

        if (is_null($name)) {
            $name = $collection->first_name . " " . $collection->last_name;
        }
    }

    $totalHours = array_sum($duration);

    // Notice I added [], this will append it to the array instead of replacing it.
    $results[] = [
        'totalHours'    => $totalHours,
        'employee_name' => $name,
    ];
}

// Notice I used `compact()` which is the same as doing ['results' => $results]
return view('admin.invoices.reporting.employeeHours', compact('results'));

我同意 Jono20201 的观点，你应该重构以利用 Eloquent ORM。

Answer 2

您每次都将

$results

设置为新数组，而实际上您想在每次交互时添加到

$results

数组。

$results[] = [
    'totalHours' => $totalHours,                
    'employee_name' => $collection->first_name . " " . $collection->last_name,                     
]; 

ps。您确实应该尝试将其重构为使用 Eloquent 模型/关系，而不是使用查询生成器。

Answer 3

你应该改变这个：

 $results = [
        'totalHours' => $totalHours,                
        'employee_name' => $collection->first_name. " " . $collection->last_name,                     
 ];  

对此：

 $results[] = [
        'totalHours' => $totalHours,                
        'employee_name' => $collection->first_name. " ".$collection->last_name,                     
 ];  

当您不使用括号时，您会将数组值替换为新值，使用括号在每次迭代中将新值附加到数组中。