Implements hook_field_info().
function file_field_info() {
return array(
'file' => array(
'label' => t('File'),
'description' => t('This field stores the ID of a file as an integer value.'),
'settings' => array(
'display_field' => 0,
'display_default' => 0,
'uri_scheme' => file_default_scheme(),
),
'instance_settings' => array(
'file_extensions' => 'txt',
'file_directory' => '',
'max_filesize' => '',
'description_field' => 0,
),
'default_widget' => 'file_generic',
'default_formatter' => 'file_default',
'field item class' => '\\Drupal\\file\\Type\\FileItem',
),
);
}