Merge branch 'fixbug' into 'master'

* Fix bug for bug export.

See merge request easycorp/zentaopms!5320

module/bug/model.php

@@ -3638,7 +3638,7 @@ class bugModel extends model
     public function getRelatedObjects($object, $pairs = '')
     {
         /* Get bugs. */
-        $bugs = $this->dao->select('*')->from(TABLE_BUG)->where($this->session->bugQueryCondition)->fetchAll('id');
+        $bugs = $this->loadModel('port')->getQueryDatas('bug');
 
         /* Get related objects id lists. */
         $relatedObjectIdList = array();

module/port/model.php

@@ -695,7 +695,7 @@ class portModel extends model
                     $lists[$listName] = $fieldList[$field]['values'];
                     if(strpos($this->config->$model->sysLangFields, $field)) $lists[$listName] = join(',', $fieldList[$field]['values']);
                 }
-                $this->config->excel->sysDataField[] = $field;
+                if(is_array($lists[$listName])) $this->config->excel->sysDataField[] = $field;
             }
 
             $lists['listStyle'] = $listFields;