[英]Zend_Db_Select: Working with JOIN's
I have this query: 我有这个查询:
SELECT
groups.name
categories.name,
categories.label
FROM
groups
JOIN
categories
ON
(categories.group1 = groups.id
OR
categories.group2 = groups.id)
AND
groups.label = :section
AND
categories.active = 1
Now, this is my JOIN using Zend_Db_Select but it gives me array error 现在,这是我使用Zend_Db_Select的联接,但是它给了我数组错误
$select->from($dao, array('groups.name', 'categories.name', 'categories.label'))
->join(array('categories', 'categories.group1 = groups.id OR categories.group2 = groups.id'))
->where('groups.label = ?', $group)
->where('categories.active = 1');
My error: 我的错误:
Exception information: 异常信息:
Message: Select query cannot join with another table 消息:选择查询无法与另一个表联接
Does anyone know what I did wrong? 有人知道我做错了吗?
UPDATE / SOLUTION: 更新/解决方案:
I've found the solution thanx to Eran. 我找到了Eran的解决方案thanx。 I just post the solution here in case anyone else is stuck on a problem like this one. 我只是在这里发布解决方案,以防其他人陷入像这样的问题中。 The solution is: 解决方案是:
$db = Zend_Registry::get('db');
$dao = new Default_Model_Db_CategoryDao('db');
$select = $dao->select();
$select->setIntegrityCheck(false)
->from(array('c' => 'categories'), array('name', 'label'))
->join(array('g' => 'groups'), 'c.group1 = g.id OR c.group2 = g.id', 'g.label')
->where('g.label = ?', $group)
->where('c.active = 1');
return $dao->fetchAll($select);
You are using a Zend_Db_Table_Select object. 您正在使用Zend_Db_Table_Select对象。 Those by default have integrity check enabled and cannot select data that is outside of their table. 默认情况下,那些启用了完整性检查,并且不能选择表外的数据。
You can turn it off by adding -> setIntegrityCheck(false) to the select object before querying with it. 您可以通过在选择对象之前添加-> setIntegrityCheck(false)到选择对象来关闭它。
You can read more about it in the manual under Select API -> Advanced usage 您可以在手册中的 “选择API->高级用法”下阅读更多信息。
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