From 5e2cbebea2327db26639141cc4b39fb9d1aa37e0 Mon Sep 17 00:00:00 2001
From: Rowan Lewis <rowan@devo.randb.com.au>
Date: Thu, 1 Oct 2009 11:15:26 +1000
Subject: [PATCH] Fixed bug where filter SQL was invalid.

---
 fields/field.expression.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/fields/field.expression.php b/fields/field.expression.php
index a3d7170..3ce8959 100755
--- a/fields/field.expression.php
+++ b/fields/field.expression.php
@@ -210,6 +210,8 @@ public function prepareTableValue($data, XMLElement $link = null) {
 	-------------------------------------------------------------------------*/
 		
 		public function buildDSRetrivalSQL($data, &$joins, &$where, $and = false) {
+			header('content-type: text/plain');
+			
 			if (is_array($data)) {
 				if ($and) $data = implode('+', $data);
 				else $data = implode(',', $data);
@@ -232,6 +234,8 @@ public function buildDSRetrivalSQL($data, &$joins, &$where, $and = false) {
 				$entries[] = $row['entry_id'];
 			}
 			
+			if (empty($entries)) return false;
+			
 			$this->_key++;
 			$data = implode(", ", $entries);
 			$joins .= "