发布于 2015-08-27 16:42:23 | 99 次阅读 | 评论: 0 | 来源: 网络整理
Validates that a value is false. Specifically, this checks to see if
the value is exactly false, exactly the integer 0, or exactly the
string “0”.
Also see True.
| Applies to | property or method |
| Options | |
| Class | False |
| Validator | FalseValidator |
The False constraint can be applied to a property or a “getter” method,
but is most commonly useful in the latter case. For example, suppose that
you want to guarantee that some state property is not in a dynamic
invalidStates array. First, you’d create a “getter” method:
protected $state;
protected $invalidStates = array();
public function isStateInvalid()
{
return in_array($this->state, $this->invalidStates);
}
In this case, the underlying object is only valid if the isStateInvalid
method returns false:
# src/Acme/BlogBundle/Resources/config/validation.yml
AcmeBlogBundleEntityAuthor
getters:
stateInvalid:
- 'False':
message: You've entered an invalid state.
// src/Acme/BlogBundle/Entity/Author.php
namespace AcmeBlogBundleEntity;
use SymfonyComponentValidatorConstraints as Assert;
class Author
{
/**
* @AssertFalse(
* message = "You've entered an invalid state."
* )
*/
public function isStateInvalid()
{
// ...
}
}
<!-- src/Acme/BlogBundle/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="AcmeBlogBundleEntityAuthor">
<getter property="stateInvalid">
<constraint name="False">
<option name="message">You've entered an invalid state.</option>
</constraint>
</getter>
</class>
</constraint-mapping>
// src/Acme/BlogBundle/Entity/Author.php
namespace AcmeBlogBundleEntity;
use SymfonyComponentValidatorMappingClassMetadata;
use SymfonyComponentValidatorConstraints as Assert;
class Author
{
public static function loadValidatorMetadata(ClassMetadata $metadata)
{
$metadata->addGetterConstraint('stateInvalid', new AssertFalse());
}
}
警告
When using YAML, be sure to surround False with quotes ('False')
or else YAML will convert this into a false Boolean value.
type: string default: This value should be false.
This message is shown if the underlying data is not false.
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.