yii2：从createCommand

Question

删除逗号我在我的控制器，这样创建一个命令：

public function actionTotal($id) 
{ 
    $query1 = new Query; 
    $query1 ->select('sum(patient_services.price) price, sum(receipts.price) receipts ,') 
     ->from('patient_services ') 
     ->leftJoin(' receipts ON patient_services.patient_id=receipts.patient_id') 
     ->where('patient_services.patient_id=:id', array(':id'=>$id));   
    $command1 = $query1->createCommand(); 
    $price = $command1->queryAll(); 
    echo Json::encode($price); 
} 

当我尝试...选择代码有一个逗号和。我不知道如何删除它

SELECT sum(patient_services.price) price, sum(receipts.price) receipts FROM `patient_services` LEFT JOIN ` receipts ON` `patient_services`.`patient_id=receipts`.`patient_id` WHERE patient_services.patient_id=1 

当我从SQL代码中删除所有逗号，并尝试在phpMyAdmin ..它正常工作:(

Answer 1

你有一个无效的leftJoin这种替换：

->leftJoin('receipts', 'patient_services.patient_id = receipts.patient_id') 

也好像你在你的选择查询的末尾一个额外的逗号删除最后一个逗号SELECT查询应该是这样的：

$query1 ->select('sum(patient_services.price) price, sum(receipts.price) receipts') 

希望这个作品。