unique save

$title_count=M('Member_card_coupon')->field('id')->where(array('title'=>$_REQUEST['title']))->select();

$id_count=count($title_count);

// dump($title_count[0]['id']);

// exit();

if($id_count>1){$this->error("不能改为已经存在的名称");}

if($id_count==1 and $title_count[0]['id']!=$_REQUEST['id']){$this->error("不能改为已经存在的名称");}

// $this->all_save('Member_card_coupon','/coupon');

$member_card_coupon=new Member_card_couponModel();

$member_card_coupon->create();

$save=$member_card_coupon->save();

if($save==1){$this->success("修改成功",U('Member_card/coupon'));}