带有Symfony 2的Twig显示了不同于prod和dev的json编码变量

We're building a Symfony 2 application that sends some data from controller to view:

我们正在构建一个Symfony 2应用程序，将一些数据从控制器发送到视图:

Controller

$user = array(
    'configuration' => array(
        'levels' => array(
            'warning' => 0.05,
            'danger'  => 0.10,
        ),
    ),
);

return $this->render(
    'MyWebsiteBundle:Core:searchResults.html.twig',
    array(
        'userJSON'  => json_encode($user)
    )
);

View

<script language="javascript">
    user = $.parseJSON("{{ userJSON }}");
</script>

Result

On dev the result looks like this and works as expected:

在dev中，结果如下所示:

user = $.parseJSON("\x7B\x22configuration\x22\x3A\x7B\x22levels\x22\x3A\x7B\x22warning\x22\x3A0.05,\x22danger\x22\x3A0.1\x7D\x7D\x7D");

On the other hand, on prod the result is encoded in a different manner, thus displaying errors in console:

另一方面，在prod上，结果以不同的方式编码，从而在控制台上显示错误:

user = $.parseJSON("{&quot;configuration&quot;:{&quot;levels&quot;:{&quot;warning&quot;:0.05,&quot;danger&quot;:0.1}}}");

Console Error: Uncaught SyntaxError: Unexpected token &

控制台错误:未捕获的SyntaxError:意外令牌&。

What generates this difference?

会产生这种差异呢?

2 个解决方案

#1

Edit: Also check @Lulhum's solution below. Up-vote it if it's better so I will select it as the correct answer.

编辑:也检查@Lulhum的解决方案。如果是更好的，请向上投票，因此我将选择它作为正确的答案。

The "problem" was Twig autoescaping variables. I used Twig's raw filter to skip autoescaping like this:

“问题”是Twig自动转义变量。我使用Twig的原始过滤器来跳过这样的自动转义:

<script language="javascript">
    user = $.parseJSON('{{ userJSON | raw }}');
</script>

Now it prints:

现在它打印:

user = $.parseJSON('{"configuration":{"levels":{"warning":0.05,"danger":0.1}}}');

Links: Symfony 2 Docs - Output escaping

链接:Symfony 2文档-输出转义

#2

It is better to avoid using the raw filter when possible. You can here achieve the same behavior with the escape filter (doc).

最好尽可能避免使用原始过滤器。您可以使用escape过滤器(doc)实现相同的行为。

<script language="javascript">
    user = $.parseJSON('{{ userJSON | escape('js') }}');
</script>

#1