CakePHP 3.6：從表中計算不同的記錄

Question

我試圖在具有 where 條件的表上實現不同的計數。

這是我嘗試過的：

$customerServiceTypes = TableRegistry::get('CustomerServiceTypes');
$customers_count = $customerServiceTypes->find('all', array(
            'fields' => 'DISTINCT CustomerServiceType.customer_id',
            'conditions' => array("CustomerServiceTypes.service_type_id" => $id)))->count();

但它不起作用。 結果我得到25但它應該是2 。 Distinct不起作用。

Answer 1

$customerServiceTypes = TableRegistry::get('CustomerServiceTypes');
$customers_count = $customerServiceTypes->find()
     ->select(['customer_id'])
     ->distinct()
     ->where(['service_type_id =' => $id])->count();