Cakephp 3:在不使用foreach的情况下对单个字段求和

Question

我正在使用cakephp 3.这里我需要求和一个字段,我已经完成了.

//mobile recharge total balance
$user_balance = $this->Users->find();
$user_balance
->select(['sum' => $user_balance->func()->sum('Users.balance')])
->first();
foreach ($user_balance as $balance) {
    $this->set("user_balance", $balance->sum);
}

在这里我使用了first(),但为什么它还在返回一个对象.是否可以获得直接求和或数组.在这里,我不想使用foreach.

Answer 1

$query = $this->Models->find('all'); //fetch the record

$res = $query->select(['total_sum' =>$query->func()->sum('the_field_you_need')])->first(); //perform the sum operation 
$total = $res->total_sum; your total sum result

$user_balance = $this->Users->find();
$res =$user_balance->select(['sum' => $user_balance->func()->sum('Users.balance')])->first();
$total = $res->sum; //your total sum result