where_in报错如何改写，保留其他条件

$data = \Phpcmf\Service::M()->db->table('1_form_daka')

->select('id,uid,cid,title,xczp,inputtime,result')

->where('DATEDIFF(from_unixtime(inputtime),now())=-'.$days)

->where_in('cid', $in)

->limit(10, 1)

->orderBy('id DESC')

->get()->getResultArray();