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[Form] update FormExtension registration #7295

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Jan 10, 2017
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[Form] update FormExtension registration #7295

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13 changes: 9 additions & 4 deletions components/form.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -194,20 +194,25 @@ to bootstrap or access Twig and add the :class:`Symfony\\Bridge\\Twig\\Extension
$vendorTwigBridgeDir.'/Resources/views/Form',
)));
$formEngine = new TwigRendererEngine(array($defaultFormTheme));
$formEngine->setEnvironment($twig);
$twig->addRuntimeLoader(new \Twig_FactoryRuntimeLoader(array(
TwigRenderer::class => function () use ($formEngine, $csrfManager) {
return new TwigRenderer($formEngine, $csrfManager);
},
)));

// ... (see the previous CSRF Protection section for more information)

// add the FormExtension to Twig
$twig->addExtension(
new FormExtension(new TwigRenderer($formEngine, $csrfManager))
);
$twig->addExtension(new FormExtension());

// create your form factory as normal
$formFactory = Forms::createFormFactoryBuilder()
// ...
->getFormFactory();

.. versionadded:: 1.30
The ``Twig_FactoryRuntimeLoader`` was introduced in Twig 1.30.

The exact details of your `Twig Configuration`_ will vary, but the goal is
always to add the :class:`Symfony\\Bridge\\Twig\\Extension\\FormExtension`
to Twig, which gives you access to the Twig functions for rendering forms.
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