发布于 2015-08-27 16:51:16 | 134 次阅读 | 评论: 0 | 来源: 网络整理
Validates that a given string length is between some minimum and maximum value.
| Applies to | property or method |
| Options | |
| Class | Length |
| Validator | LengthValidator |
To verify that the firstName field length of a class is between “2” and
“50”, you might add the following:
# src/Acme/EventBundle/Resources/config/validation.yml
AcmeEventBundleEntityParticipant:
properties:
firstName:
- Length:
min: 2
max: 50
minMessage: "Your first name must be at least {{ limit }} characters long"
maxMessage: "Your first name cannot be longer than {{ limit }} characters"
// src/Acme/EventBundle/Entity/Participant.php
namespace AcmeEventBundleEntity;
use SymfonyComponentValidatorConstraints as Assert;
class Participant
{
/**
* @AssertLength(
* min = 2,
* max = 50,
* minMessage = "Your first name must be at least {{ limit }} characters long",
* maxMessage = "Your first name cannot be longer than {{ limit }} characters"
* )
*/
protected $firstName;
}
<!-- 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="firstName">
<constraint name="Length">
<option name="min">2</option>
<option name="max">50</option>
<option name="minMessage">Your first name must be at least {{ limit }} characters long</option>
<option name="maxMessage">Your first name cannot be longer than {{ limit }} characters</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('firstName', new AssertLength(array(
'min' => 2,
'max' => 50,
'minMessage' => 'Your first name must be at least {{ limit }} characters long',
'maxMessage' => 'Your first name cannot be longer than {{ limit }} characters',
)));
}
}
type: integer
This required option is the “min” length value. Validation will fail if the given value’s length is less than this min value.
type: integer
This required option is the “max” length value. Validation will fail if the given value’s length is greater than this max value.
type: string default: UTF-8
The charset to be used when computing value’s length. The grapheme_strlen PHP
function is used if available. If not, the mb_strlen PHP function
is used if available. If neither are available, the strlen PHP function
is used.
type: string default: This value is too short. It should have {{ limit }} characters or more.
The message that will be shown if the underlying value’s length is less than the min option.
type: string default: This value is too long. It should have {{ limit }} characters or less.
The message that will be shown if the underlying value’s length is more than the max option.
type: string default: This value should have exactly {{ limit }} characters.
The message that will be shown if min and max values are equal and the underlying value’s length 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.