Fixed issue with multiple fields in order_by, removed extranious spaces in SQL generation

autoload.php

@@ -42,6 +42,20 @@ if ( ! function_exists('do_include'))
 	}
 }
 
+if ( ! function_exists('mb_trim'))
+{
+	/**
+	 * Multibyte-safe trim function
+	 *
+	 * @param string
+	 * @return string
+	 */
+	function mb_trim($string)
+	{
+		return preg_replace("/(^\s+)|(\s+$)/us", "", $string);
+	}
+}
+
 /**
  * Load a Query class
  *

classes/db_pdo.php

@@ -211,14 +211,19 @@ abstract class DB_PDO extends PDO {
 			return array_map(array($this, 'quote_ident'), $ident);
 		}
 
-		// If the string is already quoted, return the string
+		// Handle comma-separated identifiers
-		if (($pos = strpos($ident, $this->escape_char)) !== FALSE  && $pos === 0)
+		if (strpos($ident, ',') !== FALSE)
 		{
-			return $ident;
+			$parts = explode(',', $ident);
+			$parts = array_map('mb_trim', $parts);
+			$parts = array_map(array($this, 'quote_ident'), $parts);
+			$ident = implode(',', $parts);
 		}
 
+
 		// Split each identifier by the period
 		$hiers = explode('.', $ident);
+		$hiers = array_map('mb_trim', $hiers);
 
 		// Return the re-compiled string
 		return implode('.', array_map(array($this, '_quote'), $hiers));
@@ -234,11 +239,18 @@ abstract class DB_PDO extends PDO {
 	 */
 	protected function _quote($str)
 	{
+		// Don't quote numbers
 		if ( ! is_string($str) && is_numeric($str))
 		{
 			return $str;
 		}
 
+		// Don't add additional quotes
+		if (strpos($str, $this->escape_char) === 0 || strrpos($str, $this->escape_char) === 0)
+		{
+			return $str;
+		}
+
 		return "{$this->escape_char}{$str}{$this->escape_char}";
 	}
 

classes/query_builder.php

@@ -161,13 +161,6 @@ class Query_Builder {
 	 */
 	private $having_map;
 
-	/**
-	 * Query parser to safely escape conditions
-	 *
-	 * @var object
-	 */
-	private $parser;
-
 	/**
 	 * Convenience property for connection management
 	 *
@@ -859,7 +852,7 @@ class Query_Builder {
 	 */
 	public function join($table, $condition, $type='')
 	{
-		$table = implode(" ", array_map(array($this->db, 'quote_ident'), explode(' ', trim($table))));
+		$table = implode(' ', array_map(array($this->db, 'quote_ident'), explode(' ', trim($table))));
 
 		$parser = new query_parser();
 

tests/core/db_qb_test.php

@@ -160,6 +160,19 @@ abstract class QBTest extends UnitTestCase {
 
 	// --------------------------------------------------------------------------
 
+	public function TestMultiOrderBy()
+	{
+		if (empty($this->db)) return;
+
+		$query = $this->db->from('create_test')
+			->order_by('id, key')
+			->get();
+
+		$this->assertIsA($query, 'PDOStatement');
+	}
+
+	// --------------------------------------------------------------------------
+
 	public function TestSelectAvg()
 	{
 		if (empty($this->db))  return;