php - Codeigniter join 语句与 join 语句

Question

我在将以下语句转换为 codeigniter 框架中模型上的代码时遇到问题。

SELECT mt_prs_groups.groupId, mt_prs_groups.groupName, mt_prs_administrators.administratorId
FROM mt_prs_status INNER JOIN (mt_prs_administrators INNER JOIN mt_prs_groups ON mt_prs_administrators.administratorId = mt_prs_groups.administratorId) ON (mt_prs_status.statusId = mt_prs_groups.statusId) AND (mt_prs_status.statusId = mt_prs_administrators.statusId)
WHERE (((mt_prs_status.status)="Active") AND ((mt_prs_administrators.administratorId)=3)) OR (((mt_prs_administrators.administratorId)=4));

在我已将其转换为的模型上

$this->db->select('mt_prs_groups.groupId, mt_prs_groups.groupName');
$this->db->from('mt_prs_status');
$this->db->join('mt_prs_administrators', 'inner');
$this->db->join('mt_prs_groups', 'mt_prs_administrators.administratorId = mt_prs_groups.administratorId AND mt_prs_status.statusId = mt_prs_administrators.statusId', 'inner');
$this->db->where('mt_prs_status.status="Active"');
$this->db->where('mt_prs_administrators.administratorId=3');
$this->db->or_where('mt_prs_administrators.administratorId=4');

这给了我下面的错误

Error Number: 1054

Unknown column 'inner' in 'from clause'

SELECT mt_prs_groups.groupId, mt_prs_groups.groupName FROM mt_prs_status JOIN mt_prs_administrators USING (inner) INNER JOIN mt_prs_groups ON mt_prs_administrators.administratorId = mt_prs_groups.administratorId AND mt_prs_status.statusId = mt_prs_administrators.statusId WHERE mt_prs_status.status = "Active" AND mt_prs_administrators.administratorId = 3 OR mt_prs_administrators.administratorId = 4

当我将其直接放在 mysql 上时，查询运行良好，但在 codeigniter 中失败。问题是内部联接依赖于另一个内部联接

Answer 1

请尝试这个。我在 codeigniter 中尝试了这个

$this->db->select('mt_prs_groups.groupId, mt_prs_groups.groupName');
$this->db->from('mt_prs_status');
$this->db->join('mt_prs_administrators', 'mt_prs_status.statusId = mt_prs_administrators.statusId','inner');
$this->db->join('mt_prs_groups', 'mt_prs_administrators.administratorId = mt_prs_groups.administratorId', 'inner');
$this->db->where('mt_prs_status.status="Active"');
$this->db->where('mt_prs_administrators.administratorId=3');
$this->db->or_where('mt_prs_administrators.administratorId=4');