field.quote for boolean, function string

diff --git a/lib/php/db/field.php b/lib/php/db/field.php
index 19ea29db075ec1f7f1c72bf40f9b147d1de91a1c..965c9ffd24e2023aeaeae9ef0e6f9ff60b3d7a84 100644 (file)
--- a/lib/php/db/field.php
+++ b/lib/php/db/field.php
@@ -168,6 +168,10 @@ class field extends nb {
 
     if ($value === null) return 'NULL';
     if ($force_quote or $this->string()) {
+      if ($value === '') {
+        if (strpos($this->type,'time') !== false) return 'NULL';
+        if (strpos($this->type,'date') !== false) return 'NULL';
+      }
 
       if (!($db = $this->db())) return "'".preg_replace("/'/","\\'",$value)."'";
       return $db->quote($value);