织梦dedecms v5.1升级sp1后不显示上一篇、下一篇问题的解决方法

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方法很简单，也是最懒的方法，把关键之处恢复为升级之前的，需要修改两处。

第一处：

修改dede/inc/inc_archives_functions.php

原为：

代码如下:
//更新上下篇文章
if($cfg_up_prenext=='Y' && !empty($typeid))
{
$preRow = $arc->dsql->GetOne("Select ID From `{$arc->MainTable}` where ID<$aid And ID>".($aid+10)." And arcrank>-1 And typeid='$typeid' order by ID desc");
$nextRow = $arc->dsql->GetOne("Select ID From `{$arc->MainTable}` where ID<$aid And ID>".($aid-10)." And arcrank>-1 And typeid='$typeid' order by ID asc");
if(is_array($preRow)){
$arc = new Archives($preRow['ID']);
$arc->MakeHtml();
}
if(is_array($nextRow)){
$arc = new Archives($nextRow['ID']);
$arc->MakeHtml();
}
}

改为：

代码如下:
//更新上下篇文章
if($cfg_up_prenext=='Y' && !empty($typeid))
{
$preRow = $arc->dsql->GetOne("Select ID From `{$arc->MainTable}` where ID<$aid And arcrank>-1 And typeid='$typeid' order by ID desc");
$nextRow = $arc->dsql->GetOne("Select ID From `{$arc->MainTable}` where ID<$aid And arcrank>-1 And typeid='$typeid' order by ID asc");
if(is_array($preRow)){
$arc = new Archives($preRow['ID']);
$arc->MakeHtml();
}
if(is_array($nextRow)){
$arc = new Archives($nextRow['ID']);
$arc->MakeHtml();
}
}

站长天空注释： 其实主要是修改了sql语句

原来的：

代码如下:
$preRow = $arc->dsql->GetOne("Select ID From `{$arc->MainTable}` where ID<$aid And ID>".($aid+10)." And arcrank>-1 And typeid='$typeid' order by ID desc");
$nextRow = $arc->dsql->GetOne("Select ID From `{$arc->MainTable}` where ID<$aid And ID>".($aid-10)." And arcrank>-1 And typeid='$typeid' order by ID asc");

现在的

代码如下:
$preRow = $arc->dsql->GetOne("Select ID From `{$arc->MainTable}` where ID<$aid And arcrank>-1 And typeid='$typeid' order by ID desc");
$nextRow = $arc->dsql->GetOne("Select ID From `{$arc->MainTable}` where ID<$aid And arcrank>-1 And typeid='$typeid' order by ID asc");

就是将And ID>".($aid+10)." 与And ID>".($aid-10)." 去掉了，为什么id不能大于10呢。如果对于栏目比较多的，肯定不行

第二处：

修改include/inc_archives_view.php

原为：

代码如下:
//--------------------------
//获取上一篇，下一篇链接
//--------------------------
function GetPreNext($gtype='')
{
$rs = "";
if(count($this->PreNext)<2)
{

$aid = $this->ArcID;
$idmax = $this->ArcID+10;
$idmin = $this->ArcID-10;
$next = " arc.ID>'$aid' And arc.ID<'$idmax' And arc.arcrank>-1 And typeid='{$this->Fields['typeid']}' order by arc.ID asc ";
$pre = " arc.ID>'$idmin' And arc.ID<'$aid' And arc.arcrank>-1 And typeid='{$this->Fields['typeid']}' order by arc.ID desc ";
$query = "Select arc.ID,arc.title,arc.shorttitle,
arc.typeid,arc.ismake,arc.senddate,arc.arcrank,arc.money,
t.typedir,t.typename,t.namerule,t.namerule2,t.ispart,
t.moresite,t.siteurl
from `{$this->MainTable}` arc left join dede_arctype t on arc.typeid=t.ID
where ";
$nextRow = $this->dsql->GetOne($query.$next);
$preRow = $this->dsql->GetOne($query.$pre);
if(is_array($preRow))
{
$mlink = GetFileUrl($preRow['ID'],$preRow['typeid'],$preRow['senddate'],$preRow['title'],$preRow['ismake'],$preRow['arcrank'],$preRow['namerule'],$preRow['typedir'],$preRow['money'],true,$preRow['siteurl']);
$this->PreNext['pre'] = "上一篇：{$preRow['title']} ";
}
else{
$this->PreNext['pre'] = "上一篇：没有了 ";
}
if(is_array($nextRow))
{
$mlink = GetFileUrl($nextRow['ID'],$nextRow['typeid'],$nextRow['senddate'],$nextRow['title'],$nextRow['ismake'],$nextRow['arcrank'],$nextRow['namerule'],$nextRow['typedir'],$nextRow['money'],true,$nextRow['siteurl']);
$this->PreNext['next'] = "下一篇：{$nextRow['title']} ";
}
else{
$this->PreNext['next'] = "下一篇：没有了 ";
}
}

if($gtype=='pre'){
$rs = $this->PreNext['pre'];
}
else if($gtype=='next'){
$rs = $this->PreNext['next'];
}
else{
$rs = $this->PreNext['pre']." ".$this->PreNext['next'];
}

return $rs;
}

改为：

代码如下:
//--------------------------
//获取上一篇，下一篇链接
//--------------------------
function GetPreNext($gtype='')
{
$rs = "";
if(count($this->PreNext)<2)
{

$aid = $this->ArcID;
$idmax = $this->ArcID+10;
$idmin = $this->ArcID-10;
$next = " arc.ID>'$aid' And arc.arcrank>-1 And typeid='{$this->Fields['typeid']}' order by arc.ID asc ";
$pre = " arc.ID<'$aid' And arc.arcrank>-1 And typeid='{$this->Fields['typeid']}' order by arc.ID desc ";
$query = "Select arc.ID,arc.title,arc.shorttitle,
arc.typeid,arc.ismake,arc.senddate,arc.arcrank,arc.money,
t.typedir,t.typename,t.namerule,t.namerule2,t.ispart,
t.moresite,t.siteurl
from `{$this->MainTable}` arc left join dede_arctype t on arc.typeid=t.ID
where ";
$nextRow = $this->dsql->GetOne($query.$next);
$preRow = $this->dsql->GetOne($query.$pre);
if(is_array($preRow))
{
$mlink = GetFileUrl($preRow['ID'],$preRow['typeid'],$preRow['senddate'],$preRow['title'],$preRow['ismake'],$preRow['arcrank'],$preRow['namerule'],$preRow['typedir'],$preRow['money'],true,$preRow['siteurl']);
$this->PreNext['pre'] = "上一篇：{$preRow['title']} ";
}
else{
$this->PreNext['pre'] = "上一篇：没有了 ";
}
if(is_array($nextRow))
{
$mlink = GetFileUrl($nextRow['ID'],$nextRow['typeid'],$nextRow['senddate'],$nextRow['title'],$nextRow['ismake'],$nextRow['arcrank'],$nextRow['namerule'],$nextRow['typedir'],$nextRow['money'],true,$nextRow['siteurl']);
$this->PreNext['next'] = "下一篇：{$nextRow['title']} ";
}
else{
$this->PreNext['next'] = "下一篇：没有了 ";
}
}

if($gtype=='pre'){
$rs = $this->PreNext['pre'];
}
else if($gtype=='next'){
$rs = $this->PreNext['next'];
}
else{
$rs = $this->PreNext['pre']." ".$this->PreNext['next'];
}

return $rs;
}

改好的文件覆盖上传即可。

当然这里也是修改的sql语句

代码如下:
$next = " arc.ID>'$aid' And arc.arcrank>-1 And typeid='{$this->Fields['typeid']}' order by arc.ID asc ";
$pre = " arc.ID<'$aid' And arc.arcrank>-1 And typeid='{$this->Fields['typeid']}' order by arc.ID desc ";

因为可能版本不同，不建议直接全部复制，只需要替换下sql语句即可。要不容易出现错误。