我希望使用AND
和OR
进行多重查询。假设我的数组是:
array (size=8)
0 => array (size=2)
'timeline.type' => string 'videos' (length=6)
'timeline.sourceId' => string '7' (length=1)
1 => array (size=2)
'timeline.type' => string 'loadshedding' (length=12)
'timeline.sourceId' => string '5' (length=1)
2 => array (size=2)
'timeline.type' => string 'news' (length=4)
'timeline.sourceId' => string '3' (length=1)
3 => array (size=2)
'timeline.type' => string 'news' (length=4)
'timeline.sourceId' => string '5' (length=1)
上面的数组可能是动态的。我想进行如下活动记录查询:
(timeline.type = 'videos' AND timeline.sourceId = 7) OR (timeline.type = 'loadshedding' AND timeline.sourceId = 5) OR (timeline.type = 'news' AND timeline.sourceId = 3) // and so on.
我试过了:
$this->db->select('timeline.id as postid, timeline.*, sources.*, subscription.*')->from('timeline');
$this->db->join('sources', 'sources.type = timeline.type and timeline.sourceId = sources.id');
$this->db->join('subscription', 'subscription.type = timeline.type and timeline.sourceId = subscription.sourceId');
foreach($sources as $source){ //$sources is an array like given above
$this->db->or_where($source);
}
$this->db->order_by("timeline.id", "DESC");
$this->db->limit(15);
但是,当我回显$this->db->last_query();
以查看查询时。它仅返回SELECT * FROM timeline
。可能是什么问题。谢谢。
答案 0 :(得分:2)
您的代码应该像
$sources = array (
0 => array (
'timeline.type' => 'videos',
'timeline.sourceId' => '7' ),
1 => array (
'timeline.type' => 'loadshedding',
'timeline.sourceId' => '5' ) ,
2 => array (
'timeline.type' => 'news',
'timeline.sourceId' => '3' ),
3 => array (
'timeline.type' => 'news',
'timeline.sourceId' => '5')
);
end($sources); // move the internal pointer to the end of the array
$lastkey = key($sources);
$pr = "";
foreach($sources as $key=>$source)
{
if($key != $lastkey)
{
$pr.="( `timeline.type` = '". $source["timeline.type"] ."' and `timeline.sourceId` = " . (int) $source["timeline.sourceId"] . ") OR ";
}
else
{
$pr.="( `timeline.type` = '". $source["timeline.type"] ."' and `timeline.sourceId` = " . (int) $source["timeline.sourceId"] . ")";
}
}
$this->db->select('timeline.id as postid, timeline.*, sources.*, subscription.*')->from('timeline');
$this->db->join('sources', 'sources.type = timeline.type and timeline.sourceId = sources.id');
$this->db->join('subscription', 'subscription.type = timeline.type and timeline.sourceId = subscription.sourceId');
$this->db->where($pr);
$this->db->order_by("timeline.id", "DESC");
$this->db->limit(15);