意外字符"$"在“record.twig"

在我的twig模板中有以下代码来操作数据库:

{%
    $tablename = $app['config']->get('general/database/prefix') . 'entries';
    $query = "UPDATE $tablename SET $views = ? WHERE id = ?";
    $views = record.views + 1;
    $stmt = $app['db']->prepare($query);
    $stmt->bindValue(1, $views);
    $stmt->bindValue(2, record.id);
    $res = $stmt->execute();
%}

Twig_Error_Syntax
Unexpected character "$" in "record.twig" at line 18.

为什么我得到这个错误??