From 3430e21be4c2c338946004704daa3788e5df90ce Mon Sep 17 00:00:00 2001
From: Kijin Sung <kijin@kijinsung.com>
Date: Mon, 18 May 2020 19:12:06 +0900
Subject: [PATCH] Fix unnecessary query when there are no polls

---
 modules/comment/comment.model.php   | 8 ++++++--
 modules/document/document.model.php | 9 +++++++++
 modules/poll/poll.admin.view.php    | 2 +-
 3 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/modules/comment/comment.model.php b/modules/comment/comment.model.php
index d51890a64..df04759ab 100644
--- a/modules/comment/comment.model.php
+++ b/modules/comment/comment.model.php
@@ -176,9 +176,13 @@ class commentModel extends comment
 	 */
 	function getComments($comment_srl_list, $columnList = array())
 	{
-		if(is_array($comment_srl_list))
+		if (!is_array($comment_srl_list))
 		{
-			$comment_srls = implode(',', $comment_srl_list);
+			$comment_srl_list = $comment_srl_list ? explode(',', $comment_srl_list) : array();
+		}
+		if (!count($comment_srl_list))
+		{
+			return array();
 		}
 
 		// fetch from a database
diff --git a/modules/document/document.model.php b/modules/document/document.model.php
index 7380c0dd0..04ce31942 100644
--- a/modules/document/document.model.php
+++ b/modules/document/document.model.php
@@ -187,6 +187,15 @@ class documentModel extends document
 	 */
 	function getDocuments($document_srls, $is_admin = false, $load_extra_vars = true, $columnList = array())
 	{
+		if (!is_array($document_srls))
+		{
+			$document_srls = $document_srls ? explode(',', $document_srls) : array();
+		}
+		if (!count($document_srls))
+		{
+			return array();
+		}
+
 		$args = new stdClass();
 		$args->document_srls = $document_srls;
 		$args->list_count = is_array($document_srls) ? count($document_srls) : 1;
diff --git a/modules/poll/poll.admin.view.php b/modules/poll/poll.admin.view.php
index e65742301..8277a8208 100644
--- a/modules/poll/poll.admin.view.php
+++ b/modules/poll/poll.admin.view.php
@@ -52,7 +52,7 @@ class pollAdminView extends poll
 		$output = $oPollAdminModel->getPollListWithMember($args);
 
 		// check poll type. document or comment
-		if(is_array($output->data))
+		if(is_array($output->data) && count($output->data))
 		{
 			$uploadTargetSrlList = array();
 			foreach($output->data as $value)