function list_field_update_forbid

Implements hook_field_update_forbid().

File

modules/field/modules/list/list.module, line 358

Code

function list_field_update_forbid($field, $prior_field, $has_data) {
    if ($field['module'] == 'list' && $has_data) {
        // Forbid any update that removes allowed values with actual data.
        $lost_keys = array_diff(array_keys($prior_field['settings']['allowed_values']), array_keys($field['settings']['allowed_values']));
        if (_list_values_in_use($field, $lost_keys)) {
            throw new FieldUpdateForbiddenException(t('A list field (@field_name) with existing data cannot have its keys changed.', array(
                '@field_name' => $field['field_name'],
            )));
        }
    }
}