From 4183f73548c31e60808b302a3f6eddd1ce3122a8 Mon Sep 17 00:00:00 2001
From: Jakub Vrana <jakub@vrana.cz>
Date: Fri, 10 Jan 2014 20:42:01 -0800
Subject: [PATCH] Don't link NULL foreign key values

---
 adminer/select.inc.php | 2 +-
 changes.txt            | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/adminer/select.inc.php b/adminer/select.inc.php
index 1a070e1a..2f1965e4 100644
--- a/adminer/select.inc.php
+++ b/adminer/select.inc.php
@@ -370,7 +370,7 @@ if (!$columns && support("table")) {
 						if (preg_match('~blob|bytea|raw|file~', $field["type"]) && $val != "") {
 							$link = ME . 'download=' . urlencode($TABLE) . '&field=' . urlencode($key) . $unique_idf;
 						}
-						if (!$link) { // link related items
+						if (!$link && $val !== null) { // link related items
 							foreach ((array) $foreign_keys[$key] as $foreign_key) {
 								if (count($foreign_keys[$key]) == 1 || end($foreign_key["source"]) == $key) {
 									$link = "";
diff --git a/changes.txt b/changes.txt
index 683cc907..cc4f9acb 100644
--- a/changes.txt
+++ b/changes.txt
@@ -3,6 +3,7 @@ Fix compiled version of Elasticsearch
 Don't use type=number if a SQL function is used
 Disable highlighting in textareas with long texts
 Don't autofocus SQL textarea in Firefox
+Don't link NULL foreign key values
 MongoDB: Count tables, display ObjectIds, sort, limit, offset, count rows
 Elasticsearch: Create and drop DB, drop table