解决DedeCMS 5.7后台联动不能添加二级栏目

今天为客户制作一个汽车类网站，在用dedecms5.7为客户添加一个产品的分类时，发现只可以添加一级联动和三级联动，二级联动无法添加了，仔细查看源码后发现这又是一个5.7的BUG，解决此问题，只须修改dede/stepselect_main.php的相关内容就可以了。

首先在空间里找到dede/stepselect_main.php 这个文件，然后找到其中的这段代码：

else if($action=='addenum_save')
{
if(emptyempty($ename) || emptyempty($egroup))
{
Showmsg("类别名称或组名称不能为空！","-1");
exit();
}
if($issign == 1 || $topvalue == 0)
{
$enames = explode(',', $ename);
foreach($enames as $ename)
{
$arr = $dsql->GetOne("SELECT * FROM `imduo_sys_enum` WHERE egroup='$egroup' AND (evalue MOD 500)=0 ORDER BY disorder DESC ");
if(!is_array($arr)) $disorder = $evalue = ($issign==1 ? 1 : 500);
else $disorder = $evalue = $arr['disorder'] + ($issign==1 ? 1 : 500);
$dsql->ExecuteNoneQuery("INSERT INTO `imduo_sys_enum`(`ename`,`evalue`,`egroup`,`disorder`,`issign`)
VALUES('$ename','$evalue','$egroup','$disorder','$issign'); ");
}
WriteEnumsCache($egroup);
ShowMsg("成功添加枚举分类！".$dsql->GetError(), $ENV_GOBACK_URL);
exit();
} else if ($issign == 3 && $topvalue != 0)
{
$minid = $topvalue;
$maxnum = 500; // 三级子类最多500个
$enames = explode(',', $ename);
foreach ($enames as $ename)
{
$arr = $dsql->GetOne("SELECT * FROM `imduo_sys_enum` WHERE egroup='$egroup' AND evalue LIKE '$topvalue.%%%' ORDER BY evalue DESC ");
if(!is_array($arr))
{
$disorder = $minid;
$evalue = $minid.'.001';
}
else
{
$disorder = $minid;
preg_match("#([0-9]{1,})\.([0-9]{1,})#", $arr['evalue'], $matchs);
$addvalue = $matchs[2] + 1;
$addvalue = sprintf("%03d", $addvalue);
$evalue = $matchs[1].'.'.$addvalue;
}
$sql = "INSERT INTO `imduo_sys_enum`(`ename`,`evalue`,`egroup`,`disorder`,`issign`)
VALUES('$ename','$evalue','$egroup','$disorder','$issign'); ";
// echo $sql;exit;
$dsql->ExecuteNoneQuery($sql);
}
// echo $minid;
WriteEnumsCache($egroup);
ShowMsg("成功添加枚举分类！".$issign, $ENV_GOBACK_URL);
exit();
} else {
$minid = $topvalue;
$maxid = $topvalue + 500;
$enames = explode(',', $ename);
foreach($enames as $ename)
{
$arr = $dsql->GetOne("Select * From `dede_sys_enum` where egroup='$egroup' And evalue>$minid And evalue<$maxid order by evalue desc ");
if(!is_array($arr))
{
$disorder = $evalue = $minid+1;
}
else
{
$disorder = $arr['disorder']+1;
$evalue = (int)($arr['evalue']+1);
}
$dsql->ExecuteNoneQuery("Insert into `dede_sys_enum`(`ename`,`evalue`,`egroup`,`disorder`,`issign`)
values('$ename','$evalue','$egroup','$disorder','$issign'); ");
}
WriteEnumsCache($egroup);
ShowMsg("成功添加枚举分类！".$issign, $ENV_GOBACK_URL);
exit();
}
}

然后保存，在系统后台更新系统缓存就可以了的。现在在后台的联动类别管理里面就可以增加二级选择了。

2.dede/templets/stepselect_main.htm

找到

if($topvalue % 500 != 0) $arr['issign'] = 2;

修改为

if($topvalue % 500 != 0) $arr['issign'] = 3;

if($topvalue % 500 == 0) $arr['issign'] = 2;

以上这样修改后1,2,3 联动能添加，再4级就不行了。应为这里的标记只判断到3，织梦也最多能添加3级联动。所以足够用了。