Symfony表单：在特定模板中隐藏字段的实现策略

// src/Form/QuestionnaireType.php
namespace App\Form;

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\Extension\Core\Type\CheckboxType;
use Symfony\Component\Form\Extension\Core\Type\TextType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolver;
use Symfony\Component\Validator\Constraints\NotBlank;

class QuestionnaireType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options): void
    {
        // 示例：可以根据选项禁用字段
        $readOnly = $options['read_only'] ?? false; 

        $builder
            ->add('name', TextType::class, [
                'label' => '您的姓名',
                'required' => true,
                'constraints' => [new NotBlank()],
            ])
            ->add('email', TextType::class, [
                'label' => '您的邮箱',
                'required' => true,
                'constraints' => [new NotBlank()],
            ])
            ->add('acceptConsent', CheckboxType::class, [
                'label' => '我已阅读并同意隐私政策',
                'label_attr' => [
                    'class' => 'font-weight-bold'
                ],
                'required' => true,
                'constraints' => [new NotBlank()],
                'disabled' => $readOnly, // 示例：根据readOnly选项禁用
            ])
            ->add('internalNotes', TextType::class, [
                'label' => '内部备注',
                'required' => false,
                // 这个字段我们可能只在特定模板中显示
            ]);
    }

    public function configureOptions(OptionsResolver $resolver): void
    {
        $resolver->setDefaults([
            // 可以通过选项控制表单行为
            'read_only' => false,
        ]);
    }
}

{# templates/questionnaire/full_questionnaire.html.twig #}
<h1>完整问卷</h1>
{{ form_start(form) }}
    {{ form_row(form.name) }}
    {{ form_row(form.email) }}
    {{ form_row(form.acceptConsent) }}
    {{ form_row(form.internalNotes) }} {# 渲染所有字段 #}
    <button type="submit" class="btn btn-primary">提交完整问卷</button>
{{ form_end(form) }}

{# templates/questionnaire/partial_questionnaire.html.twig #}
<h1>精简问卷</h1>
{{ form_start(form) }}
    {{ form_row(form.name) }}
    {{ form_row(form.email) }}
    {# 明确不渲染 form.acceptConsent 和 form.internalNotes 字段 #}
    <button type="submit" class="btn btn-primary">提交精简问卷</button>
{{ form_end(form, {'render_rest': false}) }} {# 关键：防止未渲染字段被自动输出 #}