feat: nullable field on where and join conditions

Author: marcocesarato

includes/classes/API.php

@@ -797,6 +797,9 @@ private function get($query, $db = null)
             // bind WHERE values
             if (!empty($where_values) && count($where_values) > 0) {
                 foreach ($where_values as $key => $value) {
+	                if (is_string($value) && strtolower($value) === 'null') {
+		                $value = null;
+	                }
                     $type = self::detectPDOType($value);
                     $key = ':' . $key;
                     $sql_compiled = preg_replace('/(' . preg_quote($key, '/') . ")([,]|\s|$|\))/i", "'" . $value . "'$2", $sql_compiled);
@@ -807,6 +810,9 @@ private function get($query, $db = null)
             // bind JOIN values
             if (!empty($join_values) && count($join_values) > 0) {
                 foreach ($join_values as $key => $value) {
+	                if (is_string($value) && strtolower($value) === 'null') {
+		                $value = null;
+	                }
                     $type = self::detectPDOType($value);
                     $key = ':' . $key;
                     $sql_compiled = preg_replace('/(' . preg_quote($key, '/') . ")([,]|\s|$|\))/i", "'" . $value . "'$2", $sql_compiled);
@@ -1067,9 +1073,13 @@ private function patch($query, $db = null)
                     // bind WHERE values
                     if (!empty($where_values) && count($where_values) > 0) {
                         foreach ($where_values as $key => $value) {
+	                        if (is_string($value) && strtolower($value) === 'null') {
+		                        $value = null;
+	                        }
+	                        $type = self::detectPDOType($value);
                             $key = ':' . $key;
                             $sql_compiled = self::debugCompileSQL($sql_compiled, $key, $value);
-                            $sth->bindValue($key, $value);
+                            $sth->bindValue($key, $value, $type);
                         }
                     }