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  4. Constraints
  5. MinLength
WARNING: You are browsing the documentation for Symfony 2.2 which is not maintained anymore. Consider upgrading your projects to Symfony 5.1.

MinLength

2.2 version
Unmaintained
2.0 2.1

MinLength

Caution

The MinLength constraint is deprecated since version 2.1 and will be removed in Symfony 2.3. Use Length with the min option instead.

Validates that the length of a string is at least as long as the given limit.

Applies to property or method
Options
Class Symfony\Component\Validator\Constraints\MinLength
Validator Symfony\Component\Validator\Constraints\MinLengthValidator

Basic Usage

  • YAML
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    # src/Acme/BlogBundle/Resources/config/validation.yml
Acme\BlogBundle\Entity\Blog:
    properties:
        firstName:
            - MinLength: { limit: 3, message: "Your name must have at least {{ limit }} characters." }
  • Annotations
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    // src/Acme/BlogBundle/Entity/Blog.php
namespace Acme\BlogBundle\Entity;

use Symfony\Component\Validator\Constraints as Assert;

class Blog
{
    /**
     * @Assert\MinLength(
     *     limit=3,
     *     message="Your name must have at least {{ limit }} characters."
     * )
     */
    protected $summary;
}
  • XML
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    <!-- 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="Acme\BlogBundle\Entity\Blog">
        <property name="summary">
            <constraint name="MinLength">
                <option name="limit">3</option>
                <option name="message">Your name must have at least {{ limit }} characters.</option>
            </constraint>
        </property>
    </class>
</constraint-mapping>
  • PHP
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    // src/Acme/BlogBundle/Entity/Blog.php
namespace Acme\BlogBundle\Entity;

use Symfony\Component\Validator\Mapping\ClassMetadata;
use Symfony\Component\Validator\Constraints as Assert;

class Blog
{
    public static function loadValidatorMetadata(ClassMetadata $metadata)
    {
        $metadata->addPropertyConstraint('summary', new Assert\MinLength(array(
            'limit'   => 3,
            'message' => 'Your name must have at least {{ limit }} characters.',
        )));
    }
}

Options

limit

type: integer [default option]

This required option is the “min” value. Validation will fail if the length of the give string is less than this number.

message

type: string default: This value is too short. It should have {{ limit }} characters or more.

The message that will be shown if the underlying string has a length that is shorter than the limit option.

charset

type: charset default: UTF-8

If the PHP extension “mbstring” is installed, then the PHP function mb_strlen will be used to calculate the length of the string. The value of the charset option is passed as the second argument to that function.

This work, including the code samples, is licensed under a Creative Commons BY-SA 3.0 license.