Cakephp 3:view.ctp 对两个变量求和

Question

我有一个视图，显示相关的收入数组。我在控制器中创建了一个集合，以隔离两个变量，我需要将它们加在一起并显示为货币。

public function view($id = null)
    {
        $annualOperatingBudget = $this->AnnualOperatingBudgets->get($id, [
            'contain' => ['Azinstitutions', 'BudgetExpenses', 'BudgetExpenses.ExpenseTitles', 'BudgetRevenues', 'BudgetRevenues.RevenueTitles']
        ]);
        $collection = new Collection($annualOperatingBudget->budget_revenues);
        $revenuesGroup1 = $collection->match(['revenue_title.revenue_group' => 1 ]);
        $revenuesGroup2 = $collection->match(['revenue_title.revenue_group' => 2 ]);
        $tuitionAndFees = $collection->match(['revenue_title.revenue_title' => 'Tuition and Fees']);
        $lessScholarshipAllowance = $collection->match(['revenue_title.revenue_title' => '- less Scholarship Allowance']);
        $this->set(compact('annualOperatingBudget', $annualOperatingBudget,'revenuesGroup1', 'revenuesGroup2', 'tuitionAndFees', 'lessScholarshipAllowance')); 
    }

我能够使用调试工具包看到变量：

annualOperatingBudget (array)
revenuesGroup1 (array)
revenuesGroup2 (array)
tuitionAndFees (array)
  4 (AppModelEntityBudgetRevenue)
     id 5
     annual_operating_budget_id 1
     revenue 1278
     revenue_title_id 5
     revenue_title (array)
lessScholarshipAllowance (array)
   5 (AppModelEntityBudgetRevenue)
     id 6
     annual_operating_budget_id 1
     revenue -257
     revenue_title_id 6
     revenue_title (array)

我想将两个"收入"加在一起

我试过了：

<?= $this->Number->currency(
     ($tuitionAndFees->revenue) + ($lessScholarShipAllowance->revenue), 
    'USD', ['places' => 1]) 
?>

但是我得到几个错误：

Notice (8): Undefined property: CakeCollectionIteratorFilterIterator::$revenue [ROOTpluginsTwitsrcTemplateAnnualOperatingBudgetsview.ctp, line 49]
Notice (8): Undefined variable: lessScholarShipAllowance [ROOTpluginsTwitsrcTemplateAnnualOperatingBudgetsview.ctp, line 49]
Notice (8): Trying to get property of non-object [ROOTpluginsTwitsrcTemplateAnnualOperatingBudgetsview.ctp, line 49]

Answer 1

在

尝试获取收入属性之前，您必须迭代$tuitionAndFees和$lessScholarShipAllowance。像这样：

foreach($tuitionAndFees as $tuitionAndFee){
    echo $tuitionAndFee->revenue
}

Answer 2

如果您只需要所有学杂费的总和，则可以使用

$tuitionAndFees = $collection
    ->match(['revenue_title.revenue_title' => 'Tuition and Fees'])
    ->sumOf('revenue');

这将仅返回匹配项的总和。为$lessScholarShipAllowance做类似的事情，然后在您看来，只需

$this->Number->currency($tuitionAndFees + $lessScholarShipAllowance,
    'USD', ['places' => 1])