织梦DEDECMS给list标签加上多字段排序功能_dedecms教程_php教程

织梦dedecms的list标签orderby属性只支持按一个字段排序，假如想多个字段排序的话，就需要对PHP举办修改，使其可以支持多字段排序，修改如下：

打开include/arc.listview.class.php，找到：

//假如不消默认的sortrank或id排序，利用连系查询（数据量大时很是迟钝）

if(preg_match('/hot|click|lastpost|title/', $orderby))

{

$query = "SELECT arc.*,tp.typedir,tp.typename,tp.isdefault,tp.defaultname,

tp.namerule,tp.namerule2,tp.ispart,tp.moresite,tp.siteurl,tp.sitepath

$addField

FROM `js_archives` arc

LEFT JOIN `js_arctype` tp ON arc.typeid=tp.id

$addJoin

WHERE {$this->addSql} $ordersql LIMIT $limitstart,$row";

}

//普通环境先从arctiny表查出ID，然后按ID查询（速度很是快）

else

{

$t1 = ExecTime();

$ids = array();

$query = "SELECT id FROM `js_arctiny` arc WHERE {$this->addSql} $ordersql LIMIT $limitstart,$row ";

$this->dsql->SetQuery($query);

$this->dsql->Execute();

while($arr=$this->dsql->GetArray())

{

$ids[] = $arr['id'];

}

$idstr = join(',',$ids);

if($idstr=='')

{

return '';

}

else

{

$query = "SELECT arc.*,tp.typedir,tp.typename,tp.corank,tp.isdefault,tp.defaultname,

tp.namerule,tp.namerule2,tp.ispart,tp.moresite,tp.siteurl,tp.sitepath

$addField

FROM `js_archives` arc LEFT JOIN `js_arctype` tp ON arc.typeid=tp.id

$addJoin

WHERE arc.id in($idstr) $ordersql ";

}

$t2 = ExecTime();

//echo $t2-$t1;

}

替换为：

if($orderby=="default")

{

$t1 = ExecTime();

$ids = array();

$query = "SELECT id FROM `js_arctiny` arc WHERE {$this->addSql} $ordersql LIMIT $limitstart,$row ";

$this->dsql->SetQuery($query);

$this->dsql->Execute();

while($arr=$this->dsql->GetArray())

{

$ids[] = $arr['id'];

}

$idstr = join(',',$ids);

if($idstr=='')

{

return '';

}

else

{

$query = "SELECT arc.*,tp.typedir,tp.typename,tp.corank,tp.isdefault,tp.defaultname,

tp.namerule,tp.namerule2,tp.ispart,tp.moresite,tp.siteurl,tp.sitepath

$addField

FROM `js_archives` arc LEFT JOIN `js_arctype` tp ON arc.typeid=tp.id

$addJoin

WHERE arc.id in($idstr) $ordersql ";

}

$t2 = ExecTime();

//echo $t2-$t1;

}

else

{

$query = "SELECT arc.*,tp.typedir,tp.typename,tp.isdefault,tp.defaultname,

tp.namerule,tp.namerule2,tp.ispart,tp.moresite,tp.siteurl,tp.sitepath

$addField

FROM `js_archives` arc

LEFT JOIN `js_arctype` tp ON arc.typeid=tp.id

$addJoin

WHERE {$this->addSql} $ordersql LIMIT $limitstart,$row";

}

找到：

else {

$ordersql=" ORDER BY arc.sortrank $orderWay";

}

替换为:

else if($orderby=="default"){

$ordersql=" ORDER BY arc.sortrank $orderWay";

}

else{

$ordersql=" ORDER BY ".$orderby.",arc.sortrank $orderWay";

}

此刻在模板中就可以应用了多字段排序了，模板应用如下：

{dede:list pagesize='17' orderby='arc.title desc,arc.id'}

(责任编辑：好模板)