diff --git a/framework/db/ar/ActiveQuery.php b/framework/db/ar/ActiveQuery.php
index fbec6c9..39195a1 100644
--- a/framework/db/ar/ActiveQuery.php
+++ b/framework/db/ar/ActiveQuery.php
@@ -107,6 +107,34 @@ class ActiveQuery extends BaseQuery
 		return $class::getDbConnection();
 	}
 
+	public function asArray($value = true)
+	{
+		$this->asArray = $value;
+		return $this;
+	}
+
+	public function with()
+	{
+		$this->with = func_get_args();
+		if (isset($this->with[0]) && is_array($this->with[0])) {
+			// the parameter is given as an array
+			$this->with = $this->with[0];
+		}
+		return $this;
+	}
+
+	public function index($column)
+	{
+		$this->index = $column;
+		return $this;
+	}
+
+	public function scopes($names)
+	{
+		$this->scopes = $names;
+		return $this;
+	}
+
 	/**
 	 * Sets the parameters about query caching.
 	 * This is a shortcut method to {@link CDbConnection::cache()}.
@@ -153,13 +181,14 @@ class ActiveQuery extends BaseQuery
 		$command = $db->createCommand($this->sql, $this->params);
 		$rows = $command->queryAll();
 		$records = $this->createRecords($rows);
-
-		foreach ($this->with as $name => $config) {
-			$relation = $model->$name();
-			foreach ($config as $p => $v) {
-				$relation->$p = $v;
+		if ($records !== array()) {
+			foreach ($this->with as $name => $config) {
+				$relation = $model->$name();
+				foreach ($config as $p => $v) {
+					$relation->$p = $v;
+				}
+				$relation->findWith($records);
 			}
-			$relation->findWith($records);
 		}
 
 		return $records;
diff --git a/framework/db/ar/ActiveRecord.php b/framework/db/ar/ActiveRecord.php
index 0b3bb81..32861fe 100644
--- a/framework/db/ar/ActiveRecord.php
+++ b/framework/db/ar/ActiveRecord.php
@@ -68,11 +68,10 @@ abstract class ActiveRecord extends Model
 	public static function model()
 	{
 		$className = get_called_class();
-		if (isset(self::$_models[$className])) {
-			return self::$_models[$className];
-		} else {
-			return self::$_models[$className] = new static;
+		if (!isset(self::$_models[$className])) {
+			self::$_models[$className] = new static;
 		}
+		return self::$_models[$className];
 	}
 
 	/**
@@ -387,6 +386,7 @@ abstract class ActiveRecord extends Model
 		return new HasOneRelation(array(
 			'modelClass' => $class,
 			'parentClass' => get_class($this),
+			'parentRecords' => array($this),
 			'link' => $link,
 		));
 	}
@@ -396,6 +396,7 @@ abstract class ActiveRecord extends Model
 		return new HasManyRelation(array(
 			'modelClass' => $class,
 			'parentClass' => get_class($this),
+			'parentRecords' => array($this),
 			'link' => $link,
 		));
 	}
@@ -405,6 +406,7 @@ abstract class ActiveRecord extends Model
 		return new ManyManyRelation(array(
 			'modelClass' => $class,
 			'parentClass' => get_class($this),
+			'parentRecords' => array($this),
 			'leftLink' => $leftLink,
 			'joinTable' => $joinTable,
 			'rightLink' => $rightLink,
diff --git a/framework/db/ar/Relation.php b/framework/db/ar/Relation.php
index 50dba56..1362216 100644
--- a/framework/db/ar/Relation.php
+++ b/framework/db/ar/Relation.php
@@ -5,10 +5,14 @@ namespace yii\db\ar;
 class Relation extends ActiveQuery
 {
 	public $parentClass;
-	public $parentRecords;
 
-	public function findWith($records)
+	public function findWith(&$parentRecords)
 	{
-
+		$this->andWhere(array('in', $links, $keys));
+		$records = $this->find();
+		foreach ($records as $record) {
+			// find the matching parent record(s)
+			// insert into the parent records(s)
+		}
 	}
 }
diff --git a/framework/db/dao/QueryBuilder.php b/framework/db/dao/QueryBuilder.php
index bc5845a..e53dc79 100644
--- a/framework/db/dao/QueryBuilder.php
+++ b/framework/db/dao/QueryBuilder.php
@@ -469,16 +469,16 @@ class QueryBuilder extends \yii\base\Object
 	public function buildCondition($condition)
 	{
 		static $builders = array(
-			'and' => 'buildAndCondition',
-			'or' => 'buildAndCondition',
-			'between' => 'buildBetweenCondition',
-			'not between' => 'buildBetweenCondition',
-			'in' => 'buildInCondition',
-			'not in' => 'buildInCondition',
-			'like' => 'buildLikeCondition',
-			'not like' => 'buildLikeCondition',
-			'or like' => 'buildLikeCondition',
-			'or not like' => 'buildLikeCondition',
+			'AND' => 'buildAndCondition',
+			'OR' => 'buildAndCondition',
+			'BETWEEN' => 'buildBetweenCondition',
+			'NOT BETWEEN' => 'buildBetweenCondition',
+			'IN' => 'buildInCondition',
+			'NOT IN' => 'buildInCondition',
+			'LIKE' => 'buildLikeCondition',
+			'NOT LIKE' => 'buildLikeCondition',
+			'OR LIKE' => 'buildLikeCondition',
+			'OR NOT LIKE' => 'buildLikeCondition',
 		);
 
 		if (!is_array($condition)) {
@@ -487,7 +487,7 @@ class QueryBuilder extends \yii\base\Object
 			return '';
 		}
 		if (isset($condition[0])) { // operator format: operator, operand 1, operand 2, ...
-			$operator = $condition[0];
+			$operator = strtoupper($condition[0]);
 			if (isset($builders[$operator])) {
 				$method = $builders[$operator];
 				array_shift($condition);
@@ -534,7 +534,6 @@ class QueryBuilder extends \yii\base\Object
 			}
 		}
 		if ($parts !== array()) {
-			$operator = strtoupper($operator);
 			return '(' . implode(") $operator (", $parts) . ')';
 		} else {
 			return '';
@@ -570,22 +569,62 @@ class QueryBuilder extends \yii\base\Object
 			$values = array($values);
 		}
 
-		if ($values === array()) {
+		if ($values === array() || $column === array()) {
 			return $operator === 'in' ? '0=1' : '';
 		}
 
+		if (is_array($column)) {
+			if (count($column) > 1) {
+				return $this->buildCompositeInCondition($operator, $column, $values);
+			} else {
+				$column = reset($column);
+				foreach ($values as $i => $value) {
+					if (is_array($value)) {
+						$values[$i] = isset($value[$column]) ? $value[$column] : null;
+					} else {
+						$values[$i] = null;
+					}
+				}
+			}
+		}
+
 		foreach ($values as $i => $value) {
-			$values[$i] = is_string($value) ? $this->connection->quoteValue($value) : (string)$value;
+			if ($value === null) {
+				$values[$i] = 'NULL';
+			} else {
+				$values[$i] = is_string($value) ? $this->connection->quoteValue($value) : (string)$value;
+			}
 		}
 
 		if (strpos($column, '(') === false) {
 			$column = $this->quoteColumnName($column);
 		}
 
-		$operator = strtoupper($operator);
 		return "$column $operator (" . implode(', ', $values) . ')';
 	}
 
+	protected function buildCompositeInCondition($operator, $columns, $values)
+	{
+		foreach ($columns as $i => $column) {
+			if (strpos($column, '(') === false) {
+				$columns[$i] = $this->quoteColumnName($column);
+			}
+		}
+		$vss = array();
+		foreach ($values as $value) {
+			$vs = array();
+			foreach ($columns as $column) {
+				if (isset($value[$column])) {
+					$vs[] = is_string($value[$column]) ? $this->connection->quoteValue($value[$column]) : (string)$value[$column];
+				} else {
+					$vs[] = 'NULL';
+				}
+			}
+			$vss[] = '(' . implode(', ', $vs) . ')';
+		}
+		return '(' . implode(', ', $columns) . ") $operator (" . implode(', ', $vss) . ')';
+	}
+
 	private function buildLikeCondition($operator, $operands)
 	{
 		if (!isset($operands[0], $operands[1])) {
@@ -599,21 +638,20 @@ class QueryBuilder extends \yii\base\Object
 		}
 
 		if ($values === array()) {
-			return $operator === 'like' || $operator === 'or like' ? '0=1' : '';
+			return $operator === 'LIKE' || $operator === 'OR LIKE' ? '0=1' : '';
 		}
 
-		if ($operator === 'like' || $operator === 'not like') {
+		if ($operator === 'LIKE' || $operator === 'NOT LIKE') {
 			$andor = ' AND ';
 		} else {
 			$andor = ' OR ';
-			$operator = $operator === 'or like' ? 'like' : 'not like';
+			$operator = $operator === 'OR LIKE' ? 'LIKE' : 'NOT LIKE';
 		}
 
 		if (strpos($column, '(') === false) {
 			$column = $this->quoteColumnName($column);
 		}
 
-		$operator = strtoupper($operator);
 		$parts = array();
 		foreach ($values as $value) {
 			$parts[] = "$column $operator " . $this->connection->quoteValue($value);
@@ -730,7 +768,7 @@ class QueryBuilder extends \yii\base\Object
 							$table = $driver->quoteTableName($table);
 						}
 					}
-					$joins[$i] = strtoupper($join[0]) . ' ' . $table;
+					$joins[$i] = $join[0] . ' ' . $table;
 					if (isset($join[2])) {
 						$condition = $this->buildCondition($join[2]);
 						if ($condition !== '') {