php - CakePHP 3 : How to display sum of values in column from finder results

Question

CakePHP: 3.1.4

我的表中有一个自定义查找器函数，它获取本月的所有记录，其中“费用”行包含小数值。

在一个 View 中，我想用一个变量显示这个选择的费用值的总和。我试图在书的帮助下弄明白 Using SQL Functions但我不明白如何在我的案例中正确使用语法。

表格中的自定义查找器:

class TicketsTable extends Table
{
    // find all tickets created this month
    public function findThismonths(Query $query, array $options){

    // get first and last day of month
    $first_day_this_month = date('m-01-Y');
    $last_day_this_month  = date('m-t-Y');

    $query
    ->select(['id', 'created', 'fee', 'extend_fee'])
    ->where([ function($exp) {
        $first_day_this_month = date('Y-m-01'); 
        $last_day_this_month  = date('Y-m-t');
        return $exp->between('Tickets.created', $first_day_this_month, $last_day_this_month, 'date');
    }]);

    return $query;
}

我可以很容易地获得记录数，但我不明白这对总和有效。

Controller :

class CashpositionsController extends AppController
{
public function overview()
{

    $tickets = TableRegistry::get('Tickets');
    $thismonths = $tickets->find('thismonths'); // get records with finder
    $thismonths_count = $thismonths->count();   // get count of records

    // that's what I want but this syntax does not exist in Cake...
    $thismonths_sum = $thismonths->sum('fee'); // *nope*

    // set to display in view 
    $this->set('thismonths_count', $thismonths_count);
    $this->set('thismonths_sum', $thismonths_sum);

然后在 View 中:

<tr>
    <td>Number of tickets:</td>
    <td><?= $thismonths_count ?></td>
</tr>
<tr>
    <td>Sum of cash:</td>
    <td><?= $thismonth_sum ?></td>
</tr>

<?php foreach ($thismonths as $ticket): ?>
<tr>
    <td><?= h($ticket->id) ?> </td>
    <td><?= h($ticket->created) ?> </td>
    <td><?= h($ticket->fee) ?></td>
</tr>
<?php endforeach; ?>

书中有这个例子:

// Results in SELECT COUNT(*) count FROM ...
$query = $articles->find();
$query->select(['count' => $query->func()->count('*')]);

但我无法使用 sum() 来为我工作。

Answer 1

您可以使用收藏 (manual)

$thismonths_sum = $thismonths->sumOf('fee');