织梦园模板网提供云优cms模板,pbootcms模板,Wordpress主题模板等各类企业新闻资讯网站模板下载服务。织梦园网站模板交流群
用户名:
密码:
注册
注册后享受折扣价

dede:sql实现分页,织梦sql实现分页的办法

织梦园模板 / 2020-09-29 / 收藏

思路是把dede:list标签进行改造, 列表页专用标签的工作原理大致是先通过栏目变量id获取到对应的数据源再呈现到页面上来,那么 就可以让它不仅仅通过栏目变量id还可以通过指定的sql语句来获取数据源 可以另外嵌入一个类似{dede:listsql sql='select * from dede_posts' pagesize='10'}的标签来使用。 

打开include/arc.listview.class.php这个文件

找到: 

 if ( ! is_object ( $ctag ) ) { $ctag = $this -> dtp -> GetTag ( "list" ) ; }

这一段,在其后添加如下代码:

if(!is_object($ctag))
{
$ctag = $this->dtp->GetTag("listsql");
if (is_object($ctag))
{
$cquery = $ctag->GetAtt("sql");
$cquery = preg_replace("/SELECT(.*?)FROM/is", " SELECT count(*) as dd FROM ", $cquery);
$cquery = preg_replace("/ORDER(.*?)SC/is", "", $cquery);
$row = $this->dsql->GetOne($cquery);
if(is_array($row))
{
$this->TotalResult = $row['dd'];
}
else
{
$this->TotalResult = 0;
}
}
}

然后找到:

if($ctag->GetName()=="list")
{
$limitstart = ($this->PageNo-1) * $this->PageSize;
$row = $this->PageSize;
if(trim($ctag->GetInnerText())=="")
{
$InnerText = GetSysTemplets("list_fulllist.htm");
}
else
{
$InnerText = trim($ctag->GetInnerText());
}
$this->dtp->Assign($tagid,
$this->GetArcList(
$limitstart,
$row,
$ctag->GetAtt("col"),
$ctag->GetAtt("titlelen"),
$ctag->GetAtt("infolen"),
$ctag->GetAtt("imgwidth"),
$ctag->GetAtt("imgheight"),
$ctag->GetAtt("listtype"),
$ctag->GetAtt("orderby"),
$InnerText,
$ctag->GetAtt("tablewidth"),
$ismake,
$ctag->GetAtt("orderway")
)
);
}

这一段,在其后添加如下代码:

else if($ctag->GetName()=="listsql")
{
$limitstart = ($this->PageNo-1) * $this->PageSize;
$row = $this->PageSize;
if(trim($ctag->GetInnerText())=="")
{
$InnerText = GetSysTemplets("list_fulllist.htm");
}
else
{
$InnerText = trim($ctag->GetInnerText());
}
$this->dtp->Assign($tagid,
$this->GetSqlList(
$limitstart,
$row,
$ctag->GetAtt("sql"),
$InnerText
)
);
}

***后找到function GetArcList这个方法,在其后添加一个可以通过传入sql参数获取指定数据源的方法,代码如下:

function GetSqlList($limitstart = 0, $row = 10, $sql = '', $innertext){

global $cfg_list_son;
$innertext = trim($innertext);

if ($innertext == '') {
$innertext = GetSysTemplets('list_fulllist.htm');
}
//处理SQL语句
$limitStr = " LIMIT {$limitstart},{$row}";

$this->dsql->SetQuery($sql . $limitStr);
$this->dsql->Execute('al');
$t2 = ExecTime();

//echo $t2-$t1;
$sqllist = '';
$this->dtp2->LoadSource($innertext);
$GLOBALS['autoindex'] = 0;

//获取字段
while($row = $this->dsql->GetArray("al")) {

$GLOBALS['autoindex']++;

if(is_array($this->dtp2->CTags))
{
foreach($this->dtp2->CTags as $k=>$ctag)
{
if($ctag->GetName()=='array')
{
//传递整个数组,在runphp模式中有特殊作用
$this->dtp2->Assign($k,$row);
}
else
{
if(isset($row[$ctag->GetName()]))
{
$this->dtp2->Assign($k,$row[$ctag->GetName()]);
}
else
{
$this->dtp2->Assign($k,'');
}
}
}
}

$sqllist .= $this->dtp2->GetResult();

}//while

$t3 = ExecTime();
//echo ($t3-$t2);
$this->dsql->FreeResult('al');

return $sqllist;
}

总共就添加三段代码,调用范例:
 

{dede:listsql sql='select ID,post_title from dede_posts' pagesize='10'}
<li><a href="http://www.webname.com/[field:ID /].html">[field:post_title /]</a></li>
{/dede:listsql}
<!--分页-->
{dede:pagelist listsize='2' listitem='index pre pageno next end '/}

{dede:sql}和{dede:listsql}的文章链接地址<a href="[field:id runphp='yes'] $id=@me ;@me='';$url=GetOneArchive($id);@me=$url['arcurl'];[/field:id]"> 

相关故障问题

收缩