DEDECMS给list标签加上多字段排序功能

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'}