codeigniter：列'身份证'，才能条款不明确 [英] Codeigniter: Column 'id' in order clause is ambiguous

问题描述

我用codeIgniter的活动记录类和我使用下面的code检索错误：

I'm using CodeIgniter's Active Record Classes and I'm retrieving an error using the following code:

$this->db->select("*");
$this->db->order_by("id");
$this->db->limit($limit, $offset);
$this->db->from("atoms");
$this->db->join("atommeta", "atommeta.atom_id = atoms.atom_id");

$query  = $this->db->get();

这会产生这个错误：

It produces this error:

Error Number: 1052

Column 'id' in order clause is ambiguous

SELECT * FROM (`atoms`) JOIN `atommeta` ON `atommeta`.`atom_id` = `atoms`.`atom_id` ORDER BY `id` LIMIT 10

Filename: /Applications/MAMP/htdocs/atom/models/atom_model.php

Line Number: 197

197线： $查询= $这个 - ＆GT; DB-＆GT;获得（）;

任何想法，为什么？它似乎有什么东西做与 ORDER_BY

Any ideas as to why? It seems to be something to do with the order_by

推荐答案

该错误意味着您正试图通过用于在多个表中的列名订购。使用具有要通过订购该列的表的名称更新你的 ORDER_BY 语句。例如：

The error means that you are trying to order by a column name that is used in more than one table. Update your order_by statement with the name of the table that has the column you want to order by. For example:

$this->db->order_by('atoms.id');

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