validation.yml

Acme\Bundle\CustomBundle\Entity\Brand:
    properties:
        code:
            - NotBlank: ~

Acme\Bundle\CustomBundle\Entity\Color:
    properties:
        code:
            - NotBlank: ~
        name:
            - NotBlank: ~
        hex:
            - NotBlank: ~
        red:
            - NotBlank: ~
            - Range:
                min: 0
                max: 255
        green:
            - NotBlank: ~
            - Range:
                min: 0
                max: 255
        blue:
            - NotBlank: ~
            - Range:
                min: 0
                max: 255

Acme\Bundle\CustomBundle\Entity\Fabric:
    properties:
        code:
            - NotBlank: ~
        name:
            - NotBlank: ~

Acme\Bundle\CustomBundle\Entity\Pictogram:
    properties:
        code:
            - NotBlank: ~