From 133ea5b22256ac53ef348579bfa7cd41dc0920ff Mon Sep 17 00:00:00 2001
From: Ryan Cramer <ryan@processwire.com>
Date: Thu, 25 Jun 2020 07:14:49 -0400
Subject: [PATCH] Update for processwire/processwire-issues#1198

---
 wire/core/DatabaseQuery.php | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/wire/core/DatabaseQuery.php b/wire/core/DatabaseQuery.php
index 31586d01..9cd67d9e 100644
--- a/wire/core/DatabaseQuery.php
+++ b/wire/core/DatabaseQuery.php
@@ -641,7 +641,11 @@ abstract class DatabaseQuery extends WireData {
 		} else {
 			list($prepend, $split, $append) = $this->queryMethods[$method];
 			$values = $this->$method;
-			if(!is_array($values) || !count($values)) return '';
+			if(!is_array($values)) return ''; 
+			foreach($values as $key => $value) {
+				if(!strlen(trim($value))) unset($values[$key]); // remove any blank values
+			}
+			if(!count($values)) return '';
 			$sql = trim(implode($split, $values)); 
 			if(!strlen($sql) || $sql === trim($split)) return '';
 			$sql = $prepend . $sql . $append;