Issn
Edit this pageIssn
Validates that a value is a valid International Standard Serial Number (ISSN).
| Applies to | property or method |
| Class | Issn |
| Validator | IssnValidator |
Basic Usage
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// src/Entity/Journal.php
namespace App\Entity;
use Symfony\Component\Validator\Constraints as Assert;
class Journal
{
#[Assert\Issn]
protected string $issn;
}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.
Options
caseSensitive
type: boolean default: false
The validator will allow ISSN values to end with a lower case 'x' by default.
When switching this to true, the validator requires an upper case 'X'.
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 is not a valid ISSN.
The message shown if the given value is not a valid ISSN.
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.
requireHyphen
type: boolean default: false
The validator will allow non hyphenated ISSN values by default. When switching
this to true, the validator requires a hyphenated ISSN value.
