mysql-codeigniter在find_in_set中添加IS NULL

通过codeigniter框架生成查询时

$this->db->select('id,memo,sent_to,sent_by,read_by,date')->from('memos')
    ->where("FIND_IN_SET('1',`sent_to`)")->order_by('`id`','DESC')->get();

我在查询中自动添加IS NULL时出错

它产生

SELECT `id`, `memo`, `sent_to`, `sent_by`, `read_by`, `date` FROM `memos` 
WHERE FIND_IN_SET('1',`sent_to`) IS NULL ORDER BY `id` DESC 

代替

SELECT `id`, `memo`, `sent_to`, `sent_by`, `read_by`, `date` FROM `memos` 
WHERE FIND_IN_SET('1',`sent_to`) ORDER BY `id` DESC

解决方法:

您需要添加！= 0是您的where子句以删除IS NULL

$this->db->select('id,memo,sent_to,sent_by,read_by,date')->from('memos')
    ->where("FIND_IN_SET('1',`sent_to`)!=",0)->order_by('`id`','DESC')->get();

标签：codeigniter-3,mysql,codeigniter
来源： https://codeday.me/bug/20191012/1897888.html