我收到了这个错误
Notice: Undefined index: allowed_values_function in list_allowed_values() (line 239 of /var/www/htmlNotice: Undefined index: allowed_values in list_allowed_values() (line 248 of /var/www/html/drupal/modulesNotice: Undefined index: al
如何将默认值输入,当用户按回车键时,默认值将消失?<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><body