如何使用MoneyType Field验证表单帖子？
it uses input type="text" instead of type="number"已经够糟糕了，但更糟糕的是输入的内容并不重要，比如“asdf”，响应始终是：valid form posted.我怎样才能有用错误消息指示用户他们需要存入有效的金额，例如“43.21”？
我在添加选项上尝试了'error_bubbling' => true，在树枝视图中尝试了{{ form_errors(form) }}，在this answer建议的控制器中尝试了$form->getErrors()，但这些都是空的，因为没有无论如何，$form->isValid()总是返回true，无论用户输入如何。
.
├── composer.json
├── composer.lock
├── pub
│ └── scratch.php
├── vendor
│ └── ...
└── views
└── form.html.twig
scratch.php <?php require_once __DIR__.'/../vendor/autoload.php';
use Symfony\Component\Form\Forms;
use Symfony\Component\Form\Extension\Core\Type\MoneyType;
use Symfony\Component\Form\Extension\HttpFoundation\HttpFoundationExtension;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\Translation\Translator;
use Symfony\Bridge\Twig\Form\TwigRenderer;
use Symfony\Bridge\Twig\Form\TwigRendererEngine;
use Symfony\Bridge\Twig\Extension\FormExtension;
use Symfony\Bridge\Twig\Extension\TranslationExtension;
// the Twig file that holds all the default markup for rendering forms
// this file comes with TwigBridge
$defaultFormTheme = 'form_div_layout.html.twig';
$appVariableReflection = new \ReflectionClass('\Symfony\Bridge\Twig\AppVariable');
$vendorTwigBridgeDir = dirname($appVariableReflection->getFileName());
// the path to your other templates
$viewsDir = realpath(__DIR__.'/../views');
$twig = new Twig_Environment(new Twig_Loader_Filesystem(array(
$viewsDir,
$vendorTwigBridgeDir.'/Resources/views/Form',
)));
$formEngine = new TwigRendererEngine(array($defaultFormTheme));
$twig->addExtension(
new FormExtension(new TwigRenderer($formEngine))
);
$twig->addExtension(
new TranslationExtension(new Translator('en'))
);
$formEngine->setEnvironment($twig);
// create your form factory as normal
$formFactory = Forms::createFormFactoryBuilder()
->addExtension(new HttpFoundationExtension())
->getFormFactory();
$formBuilder = $formFactory->createBuilder();
$formBuilder->add("amount", MoneyType::class, [
'currency' => 'USD',
'error_bubbling' => true
]);
$form = $formBuilder->getForm();
$request = Request::createFromGlobals();
$form->handleRequest($request);
if ($form->isValid()) {
die('valid form posted.');
}
$form->getErrors(true);
echo $twig->render('form.html.twig', array(
'form' => $form->createView(),
));
form.html.twig {{ form_start(form) }}
{{ form_errors(form) }}
{{ form_widget(form) }}
<input type="submit" />
{{ form_end(form) }}
composer.json {
"require": {
"symfony/form": "^3.1",
"symfony/twig-bridge": "^3.1",
"symfony/translation": "^3.1",
"symfony/http-foundation": "^3.1"
}
}
答案 0 :(得分：0)
您必须将一个或多个约束附加到您的表单字段，如下所示：
use Symfony\Component\Validator\Constraints\Regex;
$formBuilder->add("amount", MoneyType::class, [
'currency' => 'USD',
'error_bubbling' => true,
'constraints' => [
new Regex(array('pattern'=>'/\d+(\.\d+)?/','message'=>'must be numeric')),
]
]);
然后，如果违反约束，将显示“必须是数字”消息，并且您的表单无效。
内置约束定义如下： http://symfony.com/doc/current/reference/constraints.html
此处说明了验证用法： http://symfony.com/doc/current/book/forms.html#using-a-form-without-a-class
答案 1 :(得分：0)
我发现我错过了Validator component。
use Symfony\Component\Validator\Validation;
// Set up the Validator component
$validator = Validation::createValidator();
然后我需要将validator extension添加到表单工厂。
use Symfony\Component\Form\Extension\Validator\ValidatorExtension;
// create your form factory as normal
$formFactory = Forms::createFormFactoryBuilder()
...
->addExtension(new ValidatorExtension($validator))
...
这当然需要composer require symfony/validator
所以，我 不需要
$form->getErrors(true) 'error_bubbling' => true {{ form_errors(form) }} scratch.php <?php require_once __DIR__.'/../vendor/autoload.php';
use Symfony\Component\Form\Forms;
use Symfony\Component\Form\Extension\Core\Type\MoneyType;
use Symfony\Component\Form\Extension\HttpFoundation\HttpFoundationExtension;
use Symfony\Component\Form\Extension\Validator\ValidatorExtension;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\Translation\Translator;
use Symfony\Component\Validator\Validation;
use Symfony\Bridge\Twig\Form\TwigRenderer;
use Symfony\Bridge\Twig\Form\TwigRendererEngine;
use Symfony\Bridge\Twig\Extension\FormExtension;
use Symfony\Bridge\Twig\Extension\TranslationExtension;
// the Twig file that holds all the default markup for rendering forms
// this file comes with TwigBridge
$defaultFormTheme = 'form_div_layout.html.twig';
$appVariableReflection = new \ReflectionClass('\Symfony\Bridge\Twig\AppVariable');
$vendorTwigBridgeDir = dirname($appVariableReflection->getFileName());
// the path to your other templates
$viewsDir = realpath(__DIR__.'/../views');
$twig = new Twig_Environment(new Twig_Loader_Filesystem(array(
$viewsDir,
$vendorTwigBridgeDir.'/Resources/views/Form',
)));
$formEngine = new TwigRendererEngine(array($defaultFormTheme));
$twig->addExtension(
new FormExtension(new TwigRenderer($formEngine))
);
$twig->addExtension(
new TranslationExtension(new Translator('en'))
);
$formEngine->setEnvironment($twig);
// Set up the Validator component
$validator = Validation::createValidator();
// create your form factory as normal
$formFactory = Forms::createFormFactoryBuilder()
->addExtension(new HttpFoundationExtension())
->addExtension(new ValidatorExtension($validator))
->getFormFactory();
$formBuilder = $formFactory->createBuilder();
$formBuilder->add("amount", MoneyType::class, [
'currency' => 'USD'
]);
$form = $formBuilder->getForm();
$request = Request::createFromGlobals();
$form->handleRequest($request);
if ($form->isValid()) {
die('valid form posted.');
}
$form->getErrors(true);
echo $twig->render('form.html.twig', array(
'form' => $form->createView(),
));
form.html.twig {{ form_start(form) }}
{{ form_widget(form) }}
<input type="submit" />
{{ form_end(form) }}
composer.json {
"require": {
"symfony/form": "^3.1",
"symfony/twig-bridge": "^3.1",
"symfony/translation": "^3.1",
"symfony/http-foundation": "^3.1"
"symfony/validator": "^3.1"
}
}