Symfony 3表单:在提交无效值的表单后显示旧的输入值 - Symfony 3 form : display old inputs values in twig after submitting a form with invalid values

Symfony 3 form : display old inputs values in twig after submitting a form with invalid values

我正在尝试获取旧的输入值并使用twig将其显示为默认值。

像这样:

{{ form_widget(form.numeroCIN, {'attr': {'class': 'form-control', value:'{% if form.vars.old.fieldName %} {{form.vars.old.fieldName}} {% endif %}'}}) }}

创建一个中间件类:

class OldInputMiddleware extends Middleware

{

public function __invoke ($request, $response, $next)
{
    $this->container->view->getEnvironment()->addGlobal('old', $_SESSION['old']);
    $_SESSION['old'] = $request->getParams();
    $response = $next($request, $response);
    return $response;
}

}

注册到App.php(我默认的引导文件)

$app->add(new 'App'Middleware'OldInputMiddleware($container));):

之后，安装了Twig Module后，你可以调用input的旧值(post失败后):

value="{{old.Name}}