CssColor

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驗證值是否為有效的 CSS 顏色。底層值在驗證前會被轉換為字串。

適用於	屬性或方法
類別	CssColor
驗證器	CssColorValidator

基本用法

在以下範例中，$defaultColor 值必須是任何有效 CSS 格式（例如 red、#369、hsla(0, 0%, 20%, 0.4)）中定義的 CSS 顏色；$accentColor 必須是以十六進位格式定義的 CSS 顏色；而 $currentColor 必須是定義為任何具名 CSS 顏色的 CSS 顏色

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        // src/Entity/Bulb.php
namespace App\Entity;

use Symfony\Component\Validator\Constraints as Assert;

class Bulb
{
    #[Assert\CssColor]
    protected string $defaultColor;

    #[Assert\CssColor(
        formats: Assert\CssColor::HEX_LONG,
        message: 'The accent color must be a 6-character hexadecimal color.',
    )]
    protected string $accentColor;

    #[Assert\CssColor(
        formats: [Assert\CssColor::BASIC_NAMED_COLORS, Assert\CssColor::EXTENDED_NAMED_COLORS],
        message: 'The color '{{ value }}' is not a valid CSS color name.',
    )]
    protected string $currentColor;
}
    

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        # config/validator/validation.yaml
App\Entity\Bulb:
    properties:
        defaultColor:
            - CssColor: ~
        accentColor:
            - CssColor:
                formats: !php/const Symfony\Component\Validator\Constraints\CssColor::HEX_LONG
                message: The accent color must be a 6-character hexadecimal color.
        currentColor:
            - CssColor:
                formats:
                    - !php/const Symfony\Component\Validator\Constraints\CssColor::BASIC_NAMED_COLORS
                    - !php/const Symfony\Component\Validator\Constraints\CssColor::EXTENDED_NAMED_COLORS
                message: The color "{{ value }}" is not a valid CSS color name.
    

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        <!-- config/validator/validation.xml -->
<?xml version="1.0" encoding="UTF-8" ?>
<constraint-mapping xmlns="https://symfony.dev.org.tw/schema/dic/constraint-mapping"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="https://symfony.dev.org.tw/schema/dic/constraint-mapping https://symfony.dev.org.tw/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd">

    <class name="App\Entity\Bulb">
        <property name="defaultColor">
            <constraint name="CssColor"/>
        </property>
        <property name="accentColor">
            <constraint name="CssColor">
                <option name="formats">hex_long</option>
                <option name="message">The accent color must be a 6-character hexadecimal color.</option>
            </constraint>
        </property>
        <property name="currentColor">
            <constraint name="CssColor">
                <option name="formats">
                    <value>basic_named_colors</value>
                    <value>extended_named_colors</value>
                </option>
                <option name="message">The color "{{ value }}" is not a valid CSS color name.</option>
            </constraint>
        </property>
    </class>
</constraint-mapping>
    

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        // src/Entity/Bulb.php
namespace App\Entity;

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

class Bulb
{
    // ...

    public static function loadValidatorMetadata(ClassMetadata $metadata): void
    {
        $metadata->addPropertyConstraint('defaultColor', new Assert\CssColor());

        $metadata->addPropertyConstraint('accentColor', new Assert\CssColor([
            'formats' => Assert\CssColor::HEX_LONG,
            'message' => 'The accent color must be a 6-character hexadecimal color.',
        ]));

        $metadata->addPropertyConstraint('currentColor', new Assert\CssColor([
            'formats' => [Assert\CssColor::BASIC_NAMED_COLORS, Assert\CssColor::EXTENDED_NAMED_COLORS],
            'message' => 'The color "{{ value }}" is not a valid CSS color name.',
        ]));
    }
}
    