Symfony表单:HTML5 datalist [英] Symfony Forms: HTML5 datalist
问题描述
如何使用数据库中的值(Doctrine)实现HTML5 datalist?
How can be implemented HTML5 datalist with values from the database (Doctrine)?
目的:将具有多个选项的选项替换为具有自动完成功能的输入。
Purpose: replace selects with many options to inputs with autocompletion.
推荐答案
首先,为字段添加新的 FormType
:。
First, add your new FormType
for the field:.
<?php
// src/Acme/Form/Type/DatalistType
namespace Acme\Form\Type;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormInterface;
use Symfony\Component\Form\FormView;
use Symfony\Component\OptionsResolver\OptionsResolverInterface;
class DatalistType extends AbstractType
{
public function getParent()
{
return 'text';
}
public function setDefaultOptions(OptionsResolverInterface $resolver)
{
$resolver->setRequired(['choices']);
}
public function buildView(FormView $view, FormInterface $form, array $options)
{
$view->vars['choices'] = $options['choices'];
}
public function getName()
{
return 'datalist';
}
}
在 services.yml
:
form.type.datalist_type:
class: Acme\Form\Type\DatalistType
tags:
- { name: form.type, alias: datalist }
你有表格主题吗?如果是,请跳到下一步,如果不是,请在 app / Resources / views / Form / fields.html.twig
中创建一个新的,并将默认的Twig主题更改为它:
Do you have a form theme? If yes, skip to the next step, if no, create a new one in app/Resources/views/Form/fields.html.twig
and change your default Twig theme to it:
# app/config/config.yml
twig:
form_themes:
- ':Form:fields.html.twig'
现在为你的新字段定义一个模板表单主题:
Now define a template for your new field in the form theme:
{% block datalist_widget %}
<input list="{{ id }}_list" {{ block('widget_attributes') }}>
<datalist id="{{ id }}_list">
{% for choice in choices %}
<option value="{{ choice }}"></option>
{% endfor %}
</datalist>
{% endblock %}
使用 FormType <中的字段/ code>:
Use your field in FormType
:
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder->add('country', 'datalist', [choices' => ['a', 'b']]);
}
而不是 ['a','b' ]
您需要以某种方式从DB加载您的选择,我建议将它们作为最简单的解决方案传递给表单选项。
Instead of ['a', 'b']
You need to load your choices from DB somehow, I'd suggest passing them in form options as the easiest solution.
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