Use String::tokenize() to split up fields.

It is slightly more intelligent than explode()
Solves basic problems in Sqlite with virtualFields.

Fixes #2163

lib/Cake/Model/Datasource/Database/Sqlite.php

@@ -18,6 +18,7 @@
  */
 
 App::uses('DboSource', 'Model/Datasource');
+App::uses('String', 'Utility');
 
 /**
  * DBO implementation for the SQLite3 DBMS.
@@ -281,7 +282,7 @@ class Sqlite extends DboSource {
 			$last = strripos($querystring, 'FROM');
 			if ($last !== false) {
 				$selectpart = substr($querystring, 7, $last - 8);
-				$selects = explode(',', $selectpart);
+				$selects = String::tokenize($selectpart, ',', '(', ')');
 			}
 		} elseif (strpos($querystring, 'PRAGMA table_info') === 0) {
 			$selects = array('cid', 'name', 'type', 'notnull', 'dflt_value', 'pk');

lib/Cake/Test/Case/Model/Datasource/Database/SqliteTest.php

@@ -20,6 +20,8 @@ App::uses('Model', 'Model');
 App::uses('AppModel', 'Model');
 App::uses('Sqlite', 'Model/Datasource/Database');
 
+require_once dirname(dirname(dirname(__FILE__))) . DS . 'models.php';
+
 /**
  * DboSqliteTestDb class
  *
@@ -88,6 +90,7 @@ class SqliteTest extends CakeTestCase {
  *
  */
 	public function setUp() {
+		parent::setUp();
 		Configure::write('Cache.disable', true);
 		$this->Dbo = ConnectionManager::getDataSource('test');
 		if (!$this->Dbo instanceof Sqlite) {
@@ -100,6 +103,7 @@ class SqliteTest extends CakeTestCase {
  *
  */
 	public function tearDown() {
+		parent::tearDown();
 		Configure::write('Cache.disable', false);
 	}
 
@@ -318,4 +322,20 @@ class SqliteTest extends CakeTestCase {
 		$this->assertEqual($result['id'], $expected);
 		$this->Dbo->query('DROP TABLE ' . $tableName);
 	}
+
+/**
+ * Test virtualFields with functions.
+ *
+ * @return void
+ */
+	public function testVirtualFieldWithFunction() {
+		$this->loadFixtures('User');
+		$User = ClassRegistry::init('User');
+		$User->virtualFields = array('name' => 'SUBSTR(User.user, 5)');
+
+		$result = $User->find('first', array(
+			'conditions' => array('User.user' => 'garrett')
+		));
+		$this->assertEquals('ett', $result['User']['name']);
+	}
 }