vich_uploader:
    db_driver: orm
    storage: flysystem

    mappings:
        resources:
            uri_prefix: '/'
            upload_destination: resources_fs
            namer: Vich\UploaderBundle\Naming\Base64Namer
            directory_namer:
                service: Vich\UploaderBundle\Naming\SubdirDirectoryNamer
                options: {chars_per_dir: 1, dirs: 3}
            inject_on_load: true
            delete_on_update: true
            delete_on_remove: true