翻译

Question

我遇到了Twig和Symfony Form组件的问题。我在我的项目中集成了Form和Twig（我使用PHP 5.5.9，没有计划更新，所以我在3.4.4版本中使用了所有Symfony所需的组件）

我遵循本指南：https://symfony.com/doc/3.4/components/form.html

在页面渲染中，我收到以下错误：

致命错误：未捕获的异常＆＃39; Twig_Error_Syntax＆＃39;消息＆＃39;未知＆＃34; trans＆＃34; 。滤波器＃＆39; in /symfony/twig-bridge/Resources/views/Form/bootstrap_4_layout.html.twig:158堆栈跟踪

这是我的代码：

使用部分：

use Symfony\Component\HttpFoundation\Session\Session;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\Form\Forms; 
use Symfony\Component\Form\FormRenderer;
use Symfony\Component\Form\Extension\HttpFoundation\HttpFoundationExtension;
use Symfony\Component\Form\Extension\Validator\ValidatorExtension;
use Symfony\Component\Form\Extension\Csrf\CsrfExtension;
use Symfony\Component\Security\Csrf\TokenStorage\SessionTokenStorage;
use Symfony\Component\Security\Csrf\TokenGenerator\UriSafeTokenGenerator;
use Symfony\Component\Security\Csrf\CsrfTokenManager;
use Symfony\Component\Form\Extension\Core\Type\FormType;
use Symfony\Component\Form\Extension\Core\Type\TextType;
use Symfony\Component\Form\Extension\Core\Type\CheckboxType;
use Symfony\Component\Validator\Validation;
use Symfony\Bridge\Twig\Extension\FormExtension;
use Symfony\Component\Validator\Constraints\NotBlank;
use Symfony\Bridge\Twig\Form\TwigRendererEngine;
use Symfony\Component\Translation\Loader\XliffFileLoader;
use Symfony\Bridge\Twig\Extension\TranslationExtension;
use Symfony\Component\Translation\Translator;

用于呈现表单的代码：

$defaultFormTheme = 'bootstrap_4_layout.html.twig';

$appVariableReflection = new \ReflectionClass('\Symfony\Bridge\Twig\AppVariable');
$vendorTwigBridgeDirectory = dirname($appVariableReflection->getFileName());
$viewsDirectory = realpath(__DIR__."/../../app/template/html");

$csrfGenerator = new UriSafeTokenGenerator();
$csrfStorage = new SessionTokenStorage($this->session);
$csrfManager = new CsrfTokenManager($csrfGenerator, $csrfStorage);

$validator = Validation::createValidator();

// Set up the Translation component
$translator = new Translator('it');
$translator->addLoader('xlf', new XliffFileLoader());
$translator->addResource('xlf', $this->libDir.'/symfony/form/Resources/translations/validators.it.xlf', 'it', 'validators');
$translator->addResource('xlf', $this->libDir.'/symfony/validator/Resources/translations/validators.it.xlf', 'it', 'validators');

$loader = new \Twig_Loader_Filesystem(array($viewsDirectory,$vendorTwigBridgeDirectory.'/Resources/views/Form'));
$twig = new \Twig_Environment($loader,array(
    'cache' => realpath(__DIR__."/../../app/template/cache"),
    'debug' => true,
));

$twig->addExtension(new FormExtension());

$formEngine = new TwigRendererEngine(array($defaultFormTheme), $twig);

$twig->addRuntimeLoader(new \Twig_FactoryRuntimeLoader(array(
FormRenderer::class => function () use ($formEngine,$csrfManager) {
    return new FormRenderer($formEngine,$csrfManager);
},
)));

$formFactory = Forms::createFormFactoryBuilder()
   ->addExtension(new HttpFoundationExtension())
   ->addExtension(new CsrfExtension($csrfManager))
   ->addExtension(new ValidatorExtension($validator))
   ->getFormFactory();

$form = $formFactory->createBuilder(FormType::class, null, array(
    'action' => 'index.php',
    'method' => 'POST'
))
->add('username',TextType::class,array(
    'constraints' => array( new NotBlank())
))
->add('password',TextType::class,array(
    'constraints' => array( new NotBlank())
))
->add('remember',CheckboxType::class)
->getForm();

$request = Request::createFromGlobals();
$form->handleRequest($request);

if ($form->isSubmitted() && $form->isValid()) {
    $data = $form->getData();
    var_dump($data);
    die();
}

echo $twig->render('login.html.twig', array(
   'form' => $form->createView()
));

树枝模板：

<!doctype html>
<html lang="it">
<head>
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
   <meta name="description" content="">
   <meta name="author" content="">
   <link rel="icon" href="../../../../favicon.ico">

   <title>Test</title>

   <!-- Bootstrap core CSS -->
   <link href="app/template/asset/css/bootstrap.min.css" rel="stylesheet">

   <!-- Custom styles for this template -->
   <link href="app/template/asset/css/signin.css" rel="stylesheet">
</head>

<body class="text-center">

    {{ form_start(form) }}
      {{ form_widget(form) }}

      <input type="submit" />
    {{ form_end(form) }}

</body>
</html>

你能帮助我吗？

感谢。

Answer 1

只是阅读错误，你可以知道到底出了什么问题：

致命错误：未捕获的异常'Twig_Error_Syntax'，消息'Unknown'trans“filter”。 in /symfony/twig-bridge/Resources/views/Form/bootstrap_4_layout.html.twig:158堆栈跟踪

这意味着文件bootstrap_4_layout.html.twig - 实际上来自symfony twig-bridge-有类似{{ string|trans ...}}的东西，这主要用于多种语言，因为你有这个错误，这意味着你的trans过滤器没有启用你需要启用它！

从你跟随它的同一个教程中说：

翻译

如果您正在使用Twig与其中一个集成   默认表单主题文件（例如form_div_layout.html.twig），有2个   用于翻译的Twig过滤器（trans和transChoice）   表单标签，错误，选项文本和其他字符串。

所以只需按照以下步骤操作即可解决问题

composer require symfony/translation symfony/config
接下来，将TranslationExtension添加到您的Twig_Environment实例

参考： https://symfony.com/doc/3.4/components/form.html#component-form-intro-install-translation

Answer 2

我想您忘了将过滤器添加到新环境中：

$getTextdomain = new \Twig_SimpleFilter('trans',function ($string){

    return $this->container->get('translator')->trans($string);    

 });

$twig->addFilter($getTextdomain);

未捕获的异常＆＃39; Twig_Error_Syntax＆＃39;消息＆＃39;未知＆＃34; trans＆＃34;过滤＆＃39;

2 个答案:

翻译