thinkphp模板传值解决方案

这个是 站点设置的代码
 public function site(){
        $site = M("site");
        $list = $site->select();
        $this->assign("list",$list);
        $this->display();
 }
 public function update(){
 $site   =   M("site");
    if($site->create()) {
        $result =   $site->save();
        if($result) {
            $this->success('操作成功！');
        }else{
            $this->error('写入错误！');
        }
    }else{
        $this->error($Form->getError());
    }
 }
 这是邮箱设置的代码  这里开始出错了 不能使用同一个模板.......
 public function email(){
        $site = M("email");
        $email = $site->select();
        $this->assign("email",$email);
        $this->display();
 }
 public function email_update(){
 $email   =   M("email");
    if($email->create()){
        $result =   $email->save();
        if($result) {
            $this->success('操作成功！');
        }else{
            $this->error('写入错误！');
        }
    }
 }