dedecms5.7不能添加二级栏目的解决方法

我在使用的分类信息的时候需要添加联动属性，结果去添加联动属性的时候，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。在自己的5.6的后台添加的时候，发现是可以的。估计又是5.7版本的bug了。于是分析了代码，和大家分享下解决的办法：

首先我们找到我们的模板源码下面的 dede/stepselect_main.php这个文件，将这段代码else if($action=='addenum_save'){if(empty($ename) || empty($egroup)){Showmsg("类别名称或组名称不能为空！","-1");exit();}if($issign == 1 || $topvalue == 0){$enames = explode(',', $ename);foreach($enames as $ename){$arr = $dsql->GetOne("SELECT * FROM `dede_sys_enum` WHERE egroup='$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);$dsql->ExecuteNoneQuery("INSERT INTO `dede_sys_enum`(`ename`,`evalue`,`egroup`,`disorder`,`issign`)VALUES('$ename','$evalue','$egroup','$disorder','$issign'); ");}WriteEnumsCache($egroup);ShowMsg("成功添加枚举分类！".$dsql->GetError(), $ENV_GOBACK_URL);exit();} else if ($issign == 2 && $topvalue != 0){$minid = $topvalue;$maxnum = 500; // 三级子类最多500个$enames = explode(',', $ename);foreach ($enames as $ename){$arr = $dsql->GetOne("SELECT * FROM `dede_sys_enum` WHERE egroup='$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("d", $addvalue);$evalue = $matchs[1].'.'.$addvalue;}$sql = "INSERT INTO `dede_sys_enum`(`ename`,`evalue`,`egroup`,`disorder`,`issign`)VALUES('$ename','$evalue','$egroup','$disorder','$issign'); ";// echo $sql;exit;$dsql->ExecuteNoneQuery($sql);}// echo $minid;WriteEnumsCache($egroup);ShowMsg("成功添加枚举分类！", $ENV_GOBACK_URL);exit();} else {$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 = $arr['evalue']+1;}$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！", $ENV_GOBACK_URL);exit();}}替换为：else if($action=='addenum_save'){if(empty($ename) || empty($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 = $dsql->GetOne("Select * From `dede_sys_enum` where egroup='$egroup' And (evalue mod 500)=0 order by evalue desc ");if(!is_array($arr)) $disorder = $evalue = ($issign==1 ? 1 : 500);else $disorder = $evalue = $arr['disorder'] + ($issign==1 ? 1 : 500);$dsql->ExecuteNoneQuery("Insert into `dede_sys_enum`(`ename`,`evalue`,`egroup`,`disorder`,`issign`)values('$ename','$evalue','$egroup','$disorder','$issign'); ");}WriteEnumsCache($egroup);ShowMsg("成功添加枚举分类！".$dsql->GetError(), $ENV_GOBACK_URL);exit();}else{$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 = $arr['evalue']+1;}$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！", $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。