运行{$articlecontent|nl2br}时出错

Notice: Undefined index: articlecontent inD:\xampp\htdocs\smarty\test\template_c\2eeb0a503563da820b1f1c6aec5244c5ac419f74.file.test.tpl.cache.php on line 27

Notice: Trying to get property of non-object inD:\xampp\htdocs\smarty\test\template_c\2eeb0a503563da820b1f1c6aec5244c5ac419f74.file.test.tpl.cache.php on line 27