Skip to content
  • About
    • What is Symfony?
    • Community
    • News
    • Contributing
    • Support
  • Documentation
    • Symfony Docs
    • Symfony Book
    • Screencasts
    • Symfony Bundles
    • Symfony Cloud
    • Training
  • Services
    • Platform.sh for Symfony Best platform to deploy Symfony apps
    • SymfonyInsight Automatic quality checks for your apps
    • Symfony Certification Prove your knowledge and boost your career
    • SensioLabs Professional services to help you with Symfony
    • Blackfire Profile and monitor performance of your apps
  • Other
  • Blog
  • Download
sponsored by SensioLabs
  1. Home
  2. Documentation
  3. Reference
  4. Constraints
  5. IsFalse
  • Documentation
  • Book
  • Reference
  • Bundles
  • Cloud

Table of Contents

  • Basic Usage
  • Options
    • groups
    • message
    • payload

IsFalse

Edit this page

IsFalse

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 IsTrue.

Applies to property or method
Class IsFalse
Validator IsFalseValidator

Basic Usage

The IsFalse 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:

1
2
3
4
5
6
7
8
protected string $state;

protected array $invalidStates = [];

public function isStateInvalid(): bool
{
    return in_array($this->state, $this->invalidStates);
}

In this case, the underlying object is only valid if the isStateInvalid() method returns false:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
// src/Entity/Author.php
namespace App\Entity;

use Symfony\Component\Validator\Constraints as Assert;

class Author
{
    #[Assert\IsFalse(
        message: "You've entered an invalid state."
    )]
    public function isStateInvalid(): bool
    {
        // ...
    }
}
1
2
3
4
5
6
# config/validator/validation.yaml
App\Entity\Author:
    getters:
        stateInvalid:
            - 'IsFalse':
                message: You've entered an invalid state.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
<!-- config/validator/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 https://symfony.com/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd">

    <class name="App\Entity\Author">
        <getter property="stateInvalid">
            <constraint name="IsFalse">
                <option name="message">You've entered an invalid state.</option>
            </constraint>
        </getter>
    </class>
</constraint-mapping>
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
// src/Entity/Author.php
namespace App\Entity;

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

class Author
{
    // ...

    public static function loadValidatorMetadata(ClassMetadata $metadata): void
    {
        $metadata->addGetterConstraint('stateInvalid', new Assert\IsFalse([
            'message' => "You've entered an invalid state.",
        ]));
    }

    public function isStateInvalid(): bool
    {
        // ...
    }
}

Note

As with most of the other constraints, null is considered a valid value. This is to allow the use of optional values. If the value is mandatory, a common solution is to combine this constraint with NotNull.

Options

groups

type: array | string default: null

It defines the validation group or groups of this constraint. Read more about validation groups.

message

type: string default: This value should be false.

This message is shown if the underlying data is not false.

You can use the following parameters in this message:

Parameter Description
{{ value }} The current (invalid) value
{{ label }} Corresponding form field label

payload

type: mixed default: null

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 you.

For example, you may want to use several error levels to present failed constraints differently in the front-end depending on the severity of the error.

This work, including the code samples, is licensed under a Creative Commons BY-SA 3.0 license.
TOC
    Version
    We stand with Ukraine.
    Version:

    Symfony 6.3 is backed by

    Symfony 6.3 is backed by

    Symfony 6.3 is backed by

    Symfony 6.3 is backed by

    Online exam, become Sylius certified today

    Online exam, become Sylius certified today

    Symfony Code Performance Profiling

    Symfony Code Performance Profiling

    Symfony footer

    ↓ Our footer now uses the colors of the Ukrainian flag because Symfony stands with the people of Ukraine.

    Avatar of Anthony MARTIN, a Symfony contributor

    Thanks Anthony MARTIN for being a Symfony contributor

    3 commits • 439 lines changed

    View all contributors that help us make Symfony

    Become a Symfony contributor

    Be an active part of the community and contribute ideas, code and bug fixes. Both experts and newcomers are welcome.

    Learn how to contribute

    Symfony™ is a trademark of Symfony SAS. All rights reserved.

    • What is Symfony?

      • Symfony at a Glance
      • Symfony Components
      • Case Studies
      • Symfony Releases
      • Security Policy
      • Logo & Screenshots
      • Trademark & Licenses
      • symfony1 Legacy
    • Learn Symfony

      • Symfony Docs
      • Symfony Book
      • Reference
      • Bundles
      • Best Practices
      • Training
      • eLearning Platform
      • Certification
    • Screencasts

      • Learn Symfony
      • Learn PHP
      • Learn JavaScript
      • Learn Drupal
      • Learn RESTful APIs
    • Community

      • SymfonyConnect
      • Support
      • How to be Involved
      • Code of Conduct
      • Events & Meetups
      • Projects using Symfony
      • Downloads Stats
      • Contributors
      • Backers
    • Blog

      • Events & Meetups
      • A week of symfony
      • Case studies
      • Cloud
      • Community
      • Conferences
      • Diversity
      • Documentation
      • Living on the edge
      • Releases
      • Security Advisories
      • SymfonyInsight
      • Twig
      • SensioLabs
    • Services

      • SensioLabs services
      • Train developers
      • Manage your project quality
      • Improve your project performance
      • Host Symfony projects

      Deployed on

    Follow Symfony

    Search by Meilisearch