A Database Error Occurred

Error Number: 1054

Unknown column 'r.tags&1' in 'where clause'

SELECT `r`.*, `h`.`project_addr` FROM `t_housing` AS `r` LEFT JOIN (SELECT `community_id`, `project_addr` FROM `t_house`)h ON `r`.`community_id`=`h`.`community_id` WHERE `r`.`issell` =0 AND `r`.`display` = 1 AND `r`.`tags&1` = 1 ORDER BY `refreshtime` DESC LIMIT 30

Filename: /www/wwwroot/yzfang/application/shared/models/FangModel.php

Line Number: 251