Photo ORM YML

Garethp\PhotosBundle\Entity\Photo:
    type: entity
    table: photos
    id:
        id:
            type: integer
            id: true
            generator:
                strategy: AUTO
    fields:
        title:
            type: string
            length: 255
            nullable: true
        filename:
            type: string
            length: 255
        timestamp:
            type: datetime
    lifecycleCallbacks:
        prePersist: [ preUpload ]
        postPersist: [ upload ]
        preUpdate: [ preUpload ]
        postUpdate: [ upload ]
        preRemove: [ storeFilenameForRemove ]
        postRemove: [ removeUpload ]