From 7fd6e14423dca2f9ff21d90146630f03c3af53bb Mon Sep 17 00:00:00 2001
From: Guy Marriott <guy@scopey.co.nz>
Date: Tue, 16 Apr 2019 12:10:13 +1200
Subject: [PATCH] Adding comment about the === 't' condition for supporting
 postgres

---
 src/ORM/FieldType/DBForeignKey.php | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/ORM/FieldType/DBForeignKey.php b/src/ORM/FieldType/DBForeignKey.php
index 5071e83e8..d8afaab8c 100644
--- a/src/ORM/FieldType/DBForeignKey.php
+++ b/src/ORM/FieldType/DBForeignKey.php
@@ -98,6 +98,8 @@ class DBForeignKey extends DBInt
 
             $dataQuery->setSelect(['over_threshold' => 'count(*) > ' . (int) $threshold]);
             $result = $dataQuery->execute()->column('over_threshold');
+
+            // Checking for 't' supports PostgreSQL before silverstripe/postgresql@2.2
             $overThreshold = !empty($result) && ($result[0] === 't' ||  (int) $result[0] === 1);
 
             static::$foreignListCache[$hasOneClass] = [