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Isbn
Isbn¶
This constraint validates that an International Standard Book Number (ISBN) is either a valid ISBN-10 or a valid ISBN-13.
Applies to | property or method |
Options | |
Class | Isbn |
Validator | IsbnValidator |
Basic Usage¶
To use the Isbn
validator, simply apply it to a property or method
on an object that will contain an ISBN.
- Annotations
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// src/Entity/Book.php namespace App\Entity; use Symfony\Component\Validator\Constraints as Assert; class Book { /** * @Assert\Isbn( * type = "isbn10", * message = "This value is not valid." * ) */ protected $isbn; }
- YAML
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# config/validator/validation.yaml App\Entity\Book: properties: isbn: - Isbn: type: isbn10 message: This value is not valid.
- XML
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<!-- 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 http://symfony.com/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd"> <class name="App\Entity\Book"> <property name="isbn"> <constraint name="Isbn"> <option name="type">isbn10</option> <option name="message">This value is not valid.</option> </constraint> </property> </class> </constraint-mapping>
- PHP
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// src/Entity/Book.php namespace App\Entity; use Symfony\Component\Validator\Mapping\ClassMetadata; use Symfony\Component\Validator\Constraints as Assert; class Book { protected $isbn; public static function loadValidatorMetadata(ClassMetadata $metadata) { $metadata->addPropertyConstraint('isbn', new Assert\Isbn([ 'type' => 'isbn10', 'message' => 'This value is not valid.', ])); } }
Note
As with most of the other constraints, null
and empty strings are
considered valid values. This is to allow them to be optional values.
If the value is mandatory, a common solution is to combine this constraint
with NotBlank.
Available Options¶
type¶
type: string
default: null
The type of ISBN to validate against. Valid values are isbn10
, isbn13
and null
to accept any kind of ISBN.
message¶
type: string
default: null
The message that will be shown if the value is not valid. If not null
,
this message has priority over all the other messages.
You can use the following parameters in this message:
Parameter | Description |
---|---|
{{ value }} |
The current (invalid) value |
isbn10Message¶
type: string
default: This value is not a valid ISBN-10.
The message that will be shown if the type option is isbn10
and the given
value does not pass the ISBN-10 check.
You can use the following parameters in this message:
Parameter | Description |
---|---|
{{ value }} |
The current (invalid) value |
isbn13Message¶
type: string
default: This value is not a valid ISBN-13.
The message that will be shown if the type option is isbn13
and the given
value does not pass the ISBN-13 check.
You can use the following parameters in this message:
Parameter | Description |
---|---|
{{ value }} |
The current (invalid) value |
bothIsbnMessage¶
type: string
default: This value is neither a valid ISBN-10 nor a valid ISBN-13.
The message that will be shown if the type option is null
and the given
value does not pass any of the ISBN checks.
You can use the following parameters in this message:
Parameter | Description |
---|---|
{{ value }} |
The current (invalid) value |
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.