发布于 2015-08-27 16:41:54 | 96 次阅读 | 评论: 0 | 来源: 网络整理
Validates that a given collection’s (i.e. an array or an object that implements Countable) element count is between some minimum and maximum value.
| Applies to | property or method |
| Options | |
| Class | Count |
| Validator | CountValidator |
To verify that the emails array field contains between 1 and 5 elements
you might add the following:
# src/Acme/EventBundle/Resources/config/validation.yml
AcmeEventBundleEntityParticipant:
properties:
emails:
- Count:
min: 1
max: 5
minMessage: "You must specify at least one email"
maxMessage: "You cannot specify more than {{ limit }} emails"
// src/Acme/EventBundle/Entity/Participant.php
namespace AcmeEventBundleEntity;
use SymfonyComponentValidatorConstraints as Assert;
class Participant
{
/**
* @AssertCount(
* min = "1",
* max = "5",
* minMessage = "You must specify at least one email",
* maxMessage = "You cannot specify more than {{ limit }} emails"
* )
*/
protected $emails = array();
}
<!-- src/Acme/EventBundle/Resources/config/validation.xml -->
<?xml version="1.0" encoding="UTF-8" ?>
<constraint-mapping xmlns="http://symfony.com/schema/dic/constraint-mapping"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://symfony.com/schema/dic/constraint-mapping http://symfony.com/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd">
<class name="AcmeEventBundleEntityParticipant">
<property name="emails">
<constraint name="Count">
<option name="min">1</option>
<option name="max">5</option>
<option name="minMessage">You must specify at least one email</option>
<option name="maxMessage">You cannot specify more than {{ limit }} emails</option>
</constraint>
</property>
</class>
</constraint-mapping>
// src/Acme/EventBundle/Entity/Participant.php
namespace AcmeEventBundleEntity;
use SymfonyComponentValidatorMappingClassMetadata;
use SymfonyComponentValidatorConstraints as Assert;
class Participant
{
public static function loadValidatorMetadata(ClassMetadata $metadata)
{
$metadata->addPropertyConstraint('emails', new AssertCount(array(
'min' => 1,
'max' => 5,
'minMessage' => 'You must specify at least one email',
'maxMessage' => 'You cannot specify more than {{ limit }} emails',
)));
}
}
type: integer
This required option is the “min” count value. Validation will fail if the given collection elements count is less than this min value.
type: integer
This required option is the “max” count value. Validation will fail if the given collection elements count is greater than this max value.
type: string default: This collection should contain {{ limit }} elements or more.
The message that will be shown if the underlying collection elements count is less than the min option.
type: string default: This collection should contain {{ limit }} elements or less.
The message that will be shown if the underlying collection elements count is more than the max option.
type: string default: This collection should contain exactly {{ limit }} elements.
The message that will be shown if min and max values are equal and the underlying collection elements count is not exactly this value.
type: mixed default: null
2.6 新版功能: The payload option was introduced in Symfony 2.6.
This option can be used to attach arbitrary domain-specific data to a constraint. The configured payload is not used by the Validator component, but its processing is completely up to.
For example, you may want to used several error levels to present failed constraint differently in the front-end depending on the severity of the error.