symfony事务提交方法

新建一个对象，给对象赋值

$em = $this->getDoctrine()->getManager(); //添加事物
$em->getConnection()->beginTransaction(); 
try { 
　　$model= new class();
　　$model->setName($name);
　　$em->persist($model );
　　$em->flush(); 
　　$em->getConnection()->commit(); 
} catch (\Exception $ex) {
　　$em->getConnection()->rollback();
　　throw $ex;
}

2. 修改数据

Bundle:table

Bundle名字，和table名

$Obj = $this->getDoctrine()->getRepository('')->findOneBy(  array('id'=>$id));
$em = $this->getDoctrine()->getManager(); //添加事物
 $em->getConnection()->beginTransaction();
  try {
                        $Obj->setName( $name);
        		$em->persist($Obj);
        		$em->flush();
                $em->getConnection()->commit();
              
            } catch (\Exception $ex) {
                $em->getConnection()->rollback();
                throw $ex;
}

3. 删除

$Obj = $this->getDoctrine()->getRepository('Bundle:table')->findOneBy(  array('id'=>$id));

$em = $this->getDoctrine()->getManager(); //添加事物
        $em->getConnection()->beginTransaction();        
        try {
            $em->remove($Obj);
            $em->flush();            
            $em->getConnection()->commit(); 
        } catch (\Exception $ex) {
            $em->getConnection()->rollback();
            throw $ex;
        }

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