为Symfony 2中的集合的每个项目指定不同的验证组? [英] Specify different validation groups for each item of a collection in Symfony 2?
问题描述
[关于集合的文档]嵌入表单(集合类型)时是否可以根据当前项目为每个项目指定验证组?看来ATM不能正常工作.
[Documentation about collection] When embedding forms (collection type) is possible to specify validation groups for each item, based on the current item? It seems not working ATM.
TaskType表单添加了一个标签集合:
The TaskType form adding a collection of tags:
// src/Acme/TaskBundle/Form/Type/TaskType.php
// ...
public function buildForm(FormBuilderInterface $builder, array $options)
{
// ...
$builder->add('tags', 'collection', array(
// ...
'by_reference' => false,
));
}
例如，我们有两个标签(标签1和标签2)，并使用添加"按钮(通过JavaScript)添加了一个新标签:
For example we have two tags (tag 1 and tag 2) and a new tag is added using the "Add" button (via JavaScript):
-----------
| add tag |
-----------
- tag 1 (existing)
- tag 2 (added clicking the "add tag" button)
标签1应该针对Default，Edit组进行验证，而标签2仅针对Default组进行验证.
Tag 1 should be validated against Default, Edit groups while tag 2 against Default group only.
基于基础数据，如果标签是新标签，它将获得Default组，如果存在Default，Create组:
Based on the underlying data, if tag is new it gets Default group, if exists Default, Create groups:
// ...
public function setDefaultOptions(OptionsResolverInterface $resolver)
{
$resolver->setDefaults(array(
'validation_groups' => function (FormInterface $form) {
$tag = $form->getData();
$groups = array('Default');
if (null !== $tag && null !== $tag->getId()) {
$groups[] = 'Edit';
}
return $groups;
}
));
}
// ...
Tag实体在编辑"组中受约束
一个示例，其中Tag定义了两个属性(省略了访问器):
Tag entity with a constraint in the "Edit" group
An example with Tag defining two properties (accessors omitted):
class Tag
{
/**
* @Assert\NotBlank()
*/
protected $name;
/**
* @Assert\NotBlank(groups={"Edit"})
* @Assert\Length(max="255")
*/
protected $description;
// ...
}
对于现有标签:说明不能为空.对于新标签:说明可以为空白.
For an existing tag: description should not be blank. For a new tag: description can be blank.
只需编辑现有标签，然后将说明保留为空白. 表单验证，但验证器服务显示错误:
Just edit an existing tag and leave the description blank. The form validates but the validator service shows errors:
$form = $this->createForm('task', $task)
->handleRequest($request);
$validator = $this->get('validator');
if ($form->isValid()) {
foreach ($task->getTags() as $tag) {
// Validate against Default, Edit groups
$errors = $validator->validate($tag, array('Default', 'Edit'));
if (null !== $tag && null !== $tag->getId()) {
echo 'Existing tag #'.$tag->getId();
} else {
echo 'New tag';
}
echo ', errors: '.count($errors).'<br>';
}
die('Form is valid.')
// ...
}
输出:
Existing tag #863, errors: 1
Form is valid.
更新1 :我尝试使用静态方法determineValidationGroups(但未成功)，如建议的此处:
Update 1: I've tried (without success) with a static method determineValidationGroups as suggested here:
public static function determineValidationGroups(FormInterface $form)
{
$groups = array('Default');
if ($form->getData() !== null && null !== $form->getData()->getId())
{
$groups = array('Edit');
}
var_dump($groups);
return $groups;
}
以TagType形式:
/**
* {@inheritdoc}
*/
public function setDefaultOptions(OptionsResolverInterface $resolver)
{
$resolver->setDefaults(array(
// ...
'validation_groups' => array(
'Acme\TaskBundle\Entity\Tag',
'determineValidationGroups'
),
));
}
只有一个现有标签和一个使用添加标签"链接创建的输出看起来是正确的.但是现有标签没有错误，说明为空白:
Output with just one existing tag and one created using the "add tag" link seems correct. But no errors for the existing tag leaving the description blank:
array (size=1)
0 => string 'Edit' (length=4)
array (size=1)
0 => string 'Edit' (length=4)
rray (size=1)
0 => string 'Default' (length=7)
rray (size=1)
0 => string 'Default' (length=7)
推荐答案
我用来测试答案的完整代码位于 Valid约束强制Validator验证嵌入的对象，并且AFAIK API无法提供设置验证组的方法.
Valid constraint force Validator to validate embed object, and AFAIK the API provides no way to set validation group.
但在更高级别上，我们可以要求Form组件将ValidationListener层叠到所有嵌入的表单，并使用Form组件API设置验证组.
But at a higher level, we can ask Form component to cascade ValidationListener to all embed forms, and use the Form component API to set validation group.
我们必须使用:
-
在FormBuilder中的
-
'cascade_validation' => true选项，在所有级别上.默认情况下，它设置为false. - TagType设置中的一个回调，用于设置验证组. (您走在正确的轨道上.)
-
'error_bubbling' => false，因为在集合中默认情况下为
'cascade_validation' => trueoption in the FormBuilder, at all levels. It is set tofalseby default.- a callback in TagType settings to set validation group. (You were on the right track.)
'error_bubbling' => false, as it is true by default in collections
完成后，我们可以在相应字段旁边显示带有所有错误的表单.
and we're done, we can display the form with all errors next to corresponding fields.
在TaskType.php中:
in TaskType.php :
class TaskType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('name')
->add('tags', 'collection', array(
'type' => 'tag',
'error_bubbling' => false,
'allow_add' => true,
'by_reference' => false,
'cascade_validation' => true
))
;
}
public function setDefaultOptions(OptionsResolverInterface $resolver)
{
$resolver->setDefaults(array(
'data_class' => 'Acme\TaskBundle\Entity\Task',
'cascade_validation' => true
));
}
}
在TagType.php中:
in TagType.php :
class TagType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('name')
->add('description', 'text', array('required' => false));
}
public function setDefaultOptions(OptionsResolverInterface $resolver)
{
$resolver->setDefaults(array(
'data_class' => 'Acme\TaskBundle\Entity\Tag',
'validation_groups' => function(FormInterface $form) {
if ($form->getData() !== null && null !== $form->getData()->getId())
{
return array('Edit');
}
return array('Default');
},
'error_bubbling' => false,
));
}
}
这篇关于为Symfony 2中的集合的每个项目指定不同的验证组?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
