我有以下模式:
$values = $this->PtlUserdata->find( all , array(
fields => array(
PtlUserdata.field ,
PtlUserdata.value ,
PtlUserdata.timestamp
),
conditions => array(
PtlUserdata.user_id => $user->get( id ),
),
order => array( PtlUserdata.timestamp => DESC ),
group => array( PtlUserdata.field )
));
我试图通过时间戳对结果进行排序,然后按字段对结果进行分组,这样我就可以用该字段的名称获得最新记录。
有谁知道怎么做这个是蛋糕吗?
感谢任何帮助,非常感谢:)
这是数据库的默认行为。 您必须想出一些办法来完成它 。
这项工作是否可行:
$values = $this->PtlUserdata->find( all , array(
fields => array(
PtlUserdata.field ,
PtlUserdata.value ,
max(PtlUserdata.timestamp)
),
conditions => array(
PtlUserdata.user_id => $user->get( id ),
PtlUserdata.timestamp => max(PtlUserdata.timestamp) ,
),
group => array(
PtlUserdata.field ,
PtlUserdata.timestamp
)
));
我还没有机会测试这个, 但你绝对需要按 < code> Ptluserdata. timestamp 分组 。
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