如何将元素添加到使用 formbuilder (Symfony) 创建的表单中?

How can I add an element into form created with formbuilder (Symfony)?

我在 Symfony4 中通过 formbuilder 创建了一个表单:

$formBuilder->add($fieldMapping['fieldName'], TextType::class, array('attr' => array('class' => 'form-control')));

这给了我以下输出:

<div>
   <label for="form_username" class="required">Username</label>
   <input type="text" id="form_username" name="form[username]"  class="form-control">
</div>

我想在输入字段后添加一行,所以结果如下所示:

<div>
   <label for="form_username" class="required">Username</label>
   <input type="text" id="form_username" name="form[username]" required="required" class="form-control">
   <span class="info" data-name="form[username]">
</div>

我的做法:

$formBuilder->add($fieldMapping['fieldName'], TextType::class, array('attr' => array('class' => 'form-control', 'after' => "<span class='info' data-name='form[username]'></span>")));

但这不正确

您可以在 Twig 中打印单个标签和小部件。

<div>
    {{ form_label(form.fieldName) }}
    {{ form_widget(form.fieldName) }}
    <span class="info" data-name="form[username]">
</div>

正如@Ahmed EBEN HASSINE 所说,更喜欢树枝形式的主题https://symfony.com/doc/current/form/form_customization.html#adding-help-messages

在一个模板内

{% use 'form_div_layout.html.twig' with form_widget_simple as base_form_widget_simple %}

{% block form_widget_simple %}
    {{ block('base_form_widget_simple') }}
    <span class="info" data-name="{{ full_name }}">
{% endblock %}


{# rest of your code #}

为所有模板创建一个基础文件

{# template/form/fields.html.twig #}
{% extends 'form_div_layout.html.twig' %}

{% block form_widget_simple %}
    {{ parent() }}

    <span class="info" data-name="{{ full_name }}">
{% endblock %}

并在您的配置中声明它

# config/packages/twig.yaml
twig:
    form_themes:
        - 'form/fields.html.twig'