diff --git a/framework/yii/base/Model.php b/framework/yii/base/Model.php
index b366a9f..caa6b61 100644
--- a/framework/yii/base/Model.php
+++ b/framework/yii/base/Model.php
@@ -229,14 +229,13 @@ class Model extends Component implements IteratorAggregate, ArrayAccess
 	 * You may override this method to change the default behavior.
 	 * @return array list of attribute names.
 	 */
-	public function attributes()
+	public static function attributes()
 	{
-		$class = new ReflectionClass($this);
+		$class = new ReflectionClass(get_called_class());
 		$names = [];
 		foreach ($class->getProperties(\ReflectionProperty::IS_PUBLIC) as $property) {
-			$name = $property->getName();
 			if (!$property->isStatic()) {
-				$names[] = $name;
+				$names[] = $property->getName();
 			}
 		}
 		return $names;
diff --git a/framework/yii/db/ActiveRecord.php b/framework/yii/db/ActiveRecord.php
index e13bf90..3de4b2b 100644
--- a/framework/yii/db/ActiveRecord.php
+++ b/framework/yii/db/ActiveRecord.php
@@ -568,9 +568,9 @@ class ActiveRecord extends Model
 	 * The default implementation will return all column names of the table associated with this AR class.
 	 * @return array list of attribute names.
 	 */
-	public function attributes()
+	public static function attributes()
 	{
-		return array_keys($this->getTableSchema()->columns);
+		return array_keys(static::getTableSchema()->columns);
 	}
 
 	/**
@@ -580,7 +580,7 @@ class ActiveRecord extends Model
 	 */
 	public function hasAttribute($name)
 	{
-		return isset($this->_attributes[$name]) || isset($this->getTableSchema()->columns[$name]);
+		return isset($this->_attributes[$name]) || in_array($name, $this->attributes());
 	}
 
 	/**
@@ -1244,7 +1244,7 @@ class ActiveRecord extends Model
 	public static function create($row)
 	{
 		$record = static::instantiate($row);
-		$columns = static::getTableSchema()->columns;
+		$columns = array_flip(static::attributes());
 		foreach ($row as $name => $value) {
 			if (isset($columns[$name])) {
 				$record->_attributes[$name] = $value;
@@ -1299,7 +1299,7 @@ class ActiveRecord extends Model
 			if ($relation instanceof ActiveRelationInterface) {
 				return $relation;
 			} else {
-				return null;
+				throw new InvalidParamException(get_class($this) . ' has no relation named "' . $name . '".');
 			}
 		} catch (UnknownMethodException $e) {
 			throw new InvalidParamException(get_class($this) . ' has no relation named "' . $name . '".', 0, $e);
@@ -1336,9 +1336,7 @@ class ActiveRecord extends Model
 			if (is_array($relation->via)) {
 				/** @var ActiveRelation $viaRelation */
 				list($viaName, $viaRelation) = $relation->via;
-				/** @var ActiveRecord $viaClass */
 				$viaClass = $viaRelation->modelClass;
-				$viaTable = $viaClass::tableName();
 				// unset $viaName so that it can be reloaded to reflect the change
 				unset($this->_related[$viaName]);
 			} else {
@@ -1355,8 +1353,19 @@ class ActiveRecord extends Model
 			foreach ($extraColumns as $k => $v) {
 				$columns[$k] = $v;
 			}
-			static::getDb()->createCommand()
-				->insert($viaTable, $columns)->execute();
+			if (is_array($relation->via)) {
+				/** @var $viaClass ActiveRecord */
+				/** @var $record ActiveRecord */
+				$record = new $viaClass();
+				foreach($columns as $column => $value) {
+					$record->$column = $value;
+				}
+				$record->insert(false);
+			} else {
+				/** @var $viaTable string */
+				static::getDb()->createCommand()
+					->insert($viaTable, $columns)->execute();
+			}
 		} else {
 			$p1 = $model->isPrimaryKey(array_keys($relation->link));
 			$p2 = $this->isPrimaryKey(array_values($relation->link));
@@ -1411,9 +1420,7 @@ class ActiveRecord extends Model
 			if (is_array($relation->via)) {
 				/** @var ActiveRelation $viaRelation */
 				list($viaName, $viaRelation) = $relation->via;
-				/** @var ActiveRecord $viaClass */
 				$viaClass = $viaRelation->modelClass;
-				$viaTable = $viaClass::tableName();
 				unset($this->_related[$viaName]);
 			} else {
 				$viaRelation = $relation->via;
@@ -1426,15 +1433,29 @@ class ActiveRecord extends Model
 			foreach ($relation->link as $a => $b) {
 				$columns[$b] = $model->$a;
 			}
-			$command = static::getDb()->createCommand();
-			if ($delete) {
-				$command->delete($viaTable, $columns)->execute();
+			if (is_array($relation->via)) {
+				/** @var $viaClass ActiveRecord */
+				if ($delete) {
+					$viaClass::deleteAll($columns);
+				} else {
+					$nulls = [];
+					foreach (array_keys($columns) as $a) {
+						$nulls[$a] = null;
+					}
+					$viaClass::updateAll($nulls, $columns);
+				}
 			} else {
-				$nulls = [];
-				foreach (array_keys($columns) as $a) {
-					$nulls[$a] = null;
+				/** @var $viaTable string */
+				$command = static::getDb()->createCommand();
+				if ($delete) {
+					$command->delete($viaTable, $columns)->execute();
+				} else {
+					$nulls = [];
+					foreach (array_keys($columns) as $a) {
+						$nulls[$a] = null;
+					}
+					$command->update($viaTable, $nulls, $columns)->execute();
 				}
-				$command->update($viaTable, $nulls, $columns)->execute();
 			}
 		} else {
 			$p1 = $model->isPrimaryKey(array_keys($relation->link));
diff --git a/framework/yii/redis/ActiveQuery.php b/framework/yii/redis/ActiveQuery.php
new file mode 100644
index 0000000..eabd843
--- /dev/null
+++ b/framework/yii/redis/ActiveQuery.php
@@ -0,0 +1,382 @@
+<?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
+namespace yii\redis;
+use yii\base\InvalidParamException;
+use yii\base\NotSupportedException;
+use yii\db\ActiveQueryInterface;
+use yii\db\ActiveQueryTrait;
+use yii\db\QueryTrait;
+
+/**
+ * ActiveQuery represents a query associated with an Active Record class.
+ *
+ * ActiveQuery instances are usually created by [[ActiveRecord::find()]]
+ * and [[ActiveRecord::count()]].
+ *
+ * ActiveQuery mainly provides the following methods to retrieve the query results:
+ *
+ * - [[one()]]: returns a single record populated with the first row of data.
+ * - [[all()]]: returns all records based on the query results.
+ * - [[count()]]: returns the number of records.
+ * - [[sum()]]: returns the sum over the specified column.
+ * - [[average()]]: returns the average over the specified column.
+ * - [[min()]]: returns the min over the specified column.
+ * - [[max()]]: returns the max over the specified column.
+ * - [[scalar()]]: returns the value of the first column in the first row of the query result.
+ * - [[exists()]]: returns a value indicating whether the query result has data or not.
+ *
+ * You can use query methods, such as [[where()]], [[limit()]] and [[orderBy()]] to customize the query options.
+ *
+ * ActiveQuery also provides the following additional query options:
+ *
+ * - [[with()]]: list of relations that this query should be performed with.
+ * - [[indexBy()]]: the name of the column by which the query result should be indexed.
+ * - [[asArray()]]: whether to return each record as an array.
+ *
+ * These options can be configured using methods of the same name. For example:
+ *
+ * ~~~
+ * $customers = Customer::find()->with('orders')->asArray()->all();
+ * ~~~
+ *
+ * @author Carsten Brandt <mail@cebe.cc>
+ * @since 2.0
+ */
+class ActiveQuery extends \yii\base\Component implements ActiveQueryInterface
+{
+	use QueryTrait;
+	use ActiveQueryTrait;
+
+	/**
+	 * Executes the query and returns all results as an array.
+	 * @param Connection $db the database connection used to execute the query.
+	 * If this parameter is not given, the `db` application component will be used.
+	 * @return ActiveRecord[] the query results. If the query results in nothing, an empty array will be returned.
+	 */
+	public function all($db = null)
+	{
+		// TODO add support for orderBy
+		$data = $this->executeScript($db, 'All');
+		$rows = [];
+		foreach($data as $dataRow) {
+			$row = [];
+			$c = count($dataRow);
+			for($i = 0; $i < $c; ) {
+				$row[$dataRow[$i++]] = $dataRow[$i++];
+			}
+			$rows[] = $row;
+		}
+		if (!empty($rows)) {
+			$models = $this->createModels($rows);
+			if (!empty($this->with)) {
+				$this->findWith($this->with, $models);
+			}
+			return $models;
+		} else {
+			return [];
+		}
+	}
+
+	/**
+	 * Executes the query and returns a single row of result.
+	 * @param Connection $db the database connection used to execute the query.
+	 * If this parameter is not given, the `db` application component will be used.
+	 * @return ActiveRecord|array|null a single row of query result. Depending on the setting of [[asArray]],
+	 * the query result may be either an array or an ActiveRecord object. Null will be returned
+	 * if the query results in nothing.
+	 */
+	public function one($db = null)
+	{
+		// TODO add support for orderBy
+		$data = $this->executeScript($db, 'One');
+		if (empty($data)) {
+			return null;
+		}
+		$row = [];
+		$c = count($data);
+		for($i = 0; $i < $c; ) {
+			$row[$data[$i++]] = $data[$i++];
+		}
+		if ($this->asArray) {
+			$model = $row;
+		} else {
+			/** @var ActiveRecord $class */
+			$class = $this->modelClass;
+			$model = $class::create($row);
+		}
+		if (!empty($this->with)) {
+			$models = [$model];
+			$this->findWith($this->with, $models);
+			$model = $models[0];
+		}
+		return $model;
+	}
+
+	/**
+	 * Returns the number of records.
+	 * @param string $q the COUNT expression. This parameter is ignored by this implementation.
+	 * @param Connection $db the database connection used to execute the query.
+	 * If this parameter is not given, the `db` application component will be used.
+	 * @return integer number of records
+	 */
+	public function count($q = '*', $db = null)
+	{
+		if ($this->offset === null && $this->limit === null && $this->where === null) {
+			/** @var ActiveRecord $modelClass */
+			$modelClass = $this->modelClass;
+			if ($db === null) {
+				$db = $modelClass::getDb();
+			}
+			return $db->executeCommand('LLEN', [$modelClass::tableName()]);
+		} else {
+			return $this->executeScript($db, 'Count');
+		}
+	}
+
+	/**
+	 * Returns a value indicating whether the query result contains any row of data.
+	 * @param Connection $db the database connection used to execute the query.
+	 * If this parameter is not given, the `db` application component will be used.
+	 * @return boolean whether the query result contains any row of data.
+	 */
+	public function exists($db = null)
+	{
+		return $this->one($db) !== null;
+	}
+
+	/**
+	 * Executes the query and returns the first column of the result.
+	 * @param string $column name of the column to select
+	 * @param Connection $db the database connection used to execute the query.
+	 * If this parameter is not given, the `db` application component will be used.
+	 * @return array the first column of the query result. An empty array is returned if the query results in nothing.
+	 */
+	public function column($column, $db = null)
+	{
+		// TODO add support for orderBy
+		return $this->executeScript($db, 'Column', $column);
+	}
+
+	/**
+	 * Returns the number of records.
+	 * @param string $column the column to sum up
+	 * @param Connection $db the database connection used to execute the query.
+	 * If this parameter is not given, the `db` application component will be used.
+	 * @return integer number of records
+	 */
+	public function sum($column, $db = null)
+	{
+		return $this->executeScript($db, 'Sum', $column);
+	}
+
+	/**
+	 * Returns the average of the specified column values.
+	 * @param string $column the column name or expression.
+	 * Make sure you properly quote column names in the expression.
+	 * @param Connection $db the database connection used to execute the query.
+	 * If this parameter is not given, the `db` application component will be used.
+	 * @return integer the average of the specified column values.
+	 */
+	public function average($column, $db = null)
+	{
+		return $this->executeScript($db, 'Average', $column);
+	}
+
+	/**
+	 * Returns the minimum of the specified column values.
+	 * @param string $column the column name or expression.
+	 * Make sure you properly quote column names in the expression.
+	 * @param Connection $db the database connection used to execute the query.
+	 * If this parameter is not given, the `db` application component will be used.
+	 * @return integer the minimum of the specified column values.
+	 */
+	public function min($column, $db = null)
+	{
+		return $this->executeScript($db, 'Min', $column);
+	}
+
+	/**
+	 * Returns the maximum of the specified column values.
+	 * @param string $column the column name or expression.
+	 * Make sure you properly quote column names in the expression.
+	 * @param Connection $db the database connection used to execute the query.
+	 * If this parameter is not given, the `db` application component will be used.
+	 * @return integer the maximum of the specified column values.
+	 */
+	public function max($column, $db = null)
+	{
+		return $this->executeScript($db, 'Max', $column);
+	}
+
+	/**
+	 * Returns the query result as a scalar value.
+	 * The value returned will be the first column in the first row of the query results.
+	 * @param string $column name of the column to select
+	 * @param Connection $db the database connection used to execute the query.
+	 * If this parameter is not given, the `db` application component will be used.
+	 * @return string|boolean the value of the first column in the first row of the query result.
+	 * False is returned if the query result is empty.
+	 */
+	public function scalar($column, $db = null)
+	{
+		$record = $this->one($db);
+		if ($record === null) {
+			return false;
+		} else {
+			return $record->$column;
+		}
+	}
+
+
+	/**
+	 * Executes a script created by [[LuaScriptBuilder]]
+	 * @param Connection $db the database connection used to execute the query.
+	 * If this parameter is not given, the `db` application component will be used.
+	 * @param string $type the type of the script to generate
+	 * @param string $columnName
+	 * @return array|bool|null|string
+	 */
+	protected function executeScript($db, $type, $columnName = null)
+	{
+		if (!empty($this->orderBy)) {
+			throw new NotSupportedException('orderBy is currently not supported by redis ActiveRecord.');
+		}
+
+		/** @var ActiveRecord $modelClass */
+		$modelClass = $this->modelClass;
+
+		if ($db === null) {
+			$db = $modelClass::getDb();
+		}
+
+		// find by primary key if possible. This is much faster than scanning all records
+		if (is_array($this->where) && !isset($this->where[0]) && $modelClass::isPrimaryKey(array_keys($this->where))) {
+			return $this->findByPk($db, $type, $columnName);
+		}
+
+		$method = 'build' . $type;
+		$script = $db->getLuaScriptBuilder()->$method($this, $columnName);
+		return $db->executeCommand('EVAL', [$script, 0]);
+	}
+
+	/**
+	 * Fetch by pk if possible as this is much faster
+	 * @param Connection $db the database connection used to execute the query.
+	 * If this parameter is not given, the `db` application component will be used.
+	 * @param string $type the type of the script to generate
+	 * @param string $columnName
+	 * @return array|bool|null|string
+	 * @throws \yii\base\InvalidParamException
+	 * @throws \yii\base\NotSupportedException
+	 */
+	private function findByPk($db, $type, $columnName = null)
+	{
+		if (count($this->where) == 1) {
+			$pks = (array) reset($this->where);
+		} else {
+			foreach($this->where as $column => $values) {
+				if (is_array($values)) {
+					// TODO support composite IN for composite PK
+					throw new NotSupportedException('Find by composite PK is not supported by redis ActiveRecord.');
+				}
+			}
+			$pks = [$this->where];
+		}
+
+		/** @var ActiveRecord $modelClass */
+		$modelClass = $this->modelClass;
+
+		$start = $this->offset === null ? 0 : $this->offset;
+		$i = 0;
+		$data = [];
+		foreach($pks as $pk) {
+			if (++$i > $start && ($this->limit === null || $i <= $start + $this->limit)) {
+				$key = $modelClass::tableName() . ':a:' . $modelClass::buildKey($pk);
+				$result = $db->executeCommand('HGETALL', [$key]);
+				if (!empty($result)) {
+					$data[] = $result;
+					if ($type === 'One' && $this->orderBy === null) {
+						break;
+					}
+				}
+			}
+		}
+		// TODO support orderBy
+
+		switch($type) {
+			case 'All':
+				return $data;
+			case 'One':
+				return reset($data);
+			case 'Count':
+				return count($data);
+			case 'Column':
+				$column = [];
+				foreach($data as $dataRow) {
+					$row = [];
+					$c = count($dataRow);
+					for($i = 0; $i < $c; ) {
+						$row[$dataRow[$i++]] = $dataRow[$i++];
+					}
+					$column[] = $row[$columnName];
+				}
+				return $column;
+			case 'Sum':
+				$sum = 0;
+				foreach($data as $dataRow) {
+					$c = count($dataRow);
+					for($i = 0; $i < $c; ) {
+						if ($dataRow[$i++] == $columnName) {
+							$sum += $dataRow[$i];
+							break;
+						}
+					}
+				}
+				return $sum;
+			case 'Average':
+				$sum = 0;
+				$count = 0;
+				foreach($data as $dataRow) {
+					$count++;
+					$c = count($dataRow);
+					for($i = 0; $i < $c; ) {
+						if ($dataRow[$i++] == $columnName) {
+							$sum += $dataRow[$i];
+							break;
+						}
+					}
+				}
+				return $sum / $count;
+			case 'Min':
+				$min = null;
+				foreach($data as $dataRow) {
+					$c = count($dataRow);
+					for($i = 0; $i < $c; ) {
+						if ($dataRow[$i++] == $columnName && ($min == null || $dataRow[$i] < $min)) {
+							$min = $dataRow[$i];
+							break;
+						}
+					}
+				}
+				return $min;
+			case 'Max':
+				$max = null;
+				foreach($data as $dataRow) {
+					$c = count($dataRow);
+					for($i = 0; $i < $c; ) {
+						if ($dataRow[$i++] == $columnName && ($max == null || $dataRow[$i] > $max)) {
+							$max = $dataRow[$i];
+							break;
+						}
+					}
+				}
+				return $max;
+		}
+		throw new InvalidParamException('Unknown fetch type: ' . $type);
+	}
+}
diff --git a/framework/yii/redis/ActiveRecord.php b/framework/yii/redis/ActiveRecord.php
new file mode 100644
index 0000000..f9fa3f3
--- /dev/null
+++ b/framework/yii/redis/ActiveRecord.php
@@ -0,0 +1,322 @@
+<?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
+namespace yii\redis;
+
+use yii\base\InvalidConfigException;
+use yii\base\NotSupportedException;
+use yii\helpers\StringHelper;
+
+/**
+ * ActiveRecord is the base class for classes representing relational data in terms of objects.
+ *
+ * This class implements the ActiveRecord pattern for the [redis](http://redis.io/) key-value store.
+ *
+ * For defining a record a subclass should at least implement the [[attributes()]] method to define
+ * attributes. A primary key can be defined via [[primaryKey()]] which defaults to `id` if not specified.
+ *
+ * The following is an example model called `Customer`:
+ *
+ * ```php
+ * class Customer extends \yii\redis\ActiveRecord
+ * {
+ *     public function attributes()
+ *     {
+ *         return ['id', 'name', 'address', 'registration_date'];
+ *     }
+ * }
+ * ```
+ *
+ * @author Carsten Brandt <mail@cebe.cc>
+ * @since 2.0
+ */
+class ActiveRecord extends \yii\db\ActiveRecord
+{
+	/**
+	 * Returns the database connection used by this AR class.
+	 * By default, the "redis" application component is used as the database connection.
+	 * You may override this method if you want to use a different database connection.
+	 * @return Connection the database connection used by this AR class.
+	 */
+	public static function getDb()
+	{
+		return \Yii::$app->getComponent('redis');
+	}
+
+	/**
+	 * @inheritDoc
+	 */
+	public static function createQuery()
+	{
+		return new ActiveQuery(['modelClass' => get_called_class()]);
+	}
+
+	/**
+	 * @inheritDoc
+	 */
+	protected function createActiveRelation($config = [])
+	{
+		return new ActiveRelation($config);
+	}
+
+	/**
+	 * Returns the primary key name(s) for this AR class.
+	 * This method should be overridden by child classes to define the primary key.
+	 *
+	 * Note that an array should be returned even when it is a single primary key.
+	 *
+	 * @return string[] the primary keys of this record.
+	 */
+	public static function primaryKey()
+	{
+		return ['id'];
+	}
+
+	/**
+	 * Returns the list of all attribute names of the model.
+	 * This method must be overridden by child classes to define available attributes.
+	 * @return array list of attribute names.
+	 */
+	public static function attributes()
+	{
+		throw new InvalidConfigException('The attributes() method of redis ActiveRecord has to be implemented by child classes.');
+	}
+
+	/**
+	 * @inheritDocs
+	 */
+	public function insert($runValidation = true, $attributes = null)
+	{
+		if ($runValidation && !$this->validate($attributes)) {
+			return false;
+		}
+		if ($this->beforeSave(true)) {
+			$db = static::getDb();
+			$values = $this->getDirtyAttributes($attributes);
+			$pk = [];
+//			if ($values === []) {
+			foreach ($this->primaryKey() as $key) {
+				$pk[$key] = $values[$key] = $this->getAttribute($key);
+				if ($pk[$key] === null) {
+					$pk[$key] = $values[$key] = $db->executeCommand('INCR', [static::tableName() . ':s:' . $key]);
+					$this->setAttribute($key, $values[$key]);
+				}
+			}
+//			}
+			// save pk in a findall pool
+			$db->executeCommand('RPUSH', [static::tableName(), static::buildKey($pk)]);
+
+			$key = static::tableName() . ':a:' . static::buildKey($pk);
+			// save attributes
+			$args = [$key];
+			foreach($values as $attribute => $value) {
+				$args[] = $attribute;
+				$args[] = $value;
+			}
+			$db->executeCommand('HMSET', $args);
+
+			$this->setOldAttributes($values);
+			$this->afterSave(true);
+			return true;
+		}
+		return false;
+	}
+
+	/**
+	 * Updates the whole table using the provided attribute values and conditions.
+	 * For example, to change the status to be 1 for all customers whose status is 2:
+	 *
+	 * ~~~
+	 * Customer::updateAll(['status' => 1], ['id' => 2]);
+	 * ~~~
+	 *
+	 * @param array $attributes attribute values (name-value pairs) to be saved into the table
+	 * @param array $condition the conditions that will be put in the WHERE part of the UPDATE SQL.
+	 * Please refer to [[ActiveQuery::where()]] on how to specify this parameter.
+	 * @param array $params this parameter is ignored in redis implementation.
+	 * @return integer the number of rows updated
+	 */
+	public static function updateAll($attributes, $condition = null, $params = [])
+	{
+		if (empty($attributes)) {
+			return 0;
+		}
+		$db = static::getDb();
+		$n=0;
+		foreach(static::fetchPks($condition) as $pk) {
+			$newPk = $pk;
+			$pk = static::buildKey($pk);
+			$key = static::tableName() . ':a:' . $pk;
+			// save attributes
+			$args = [$key];
+			foreach($attributes as $attribute => $value) {
+				if (isset($newPk[$attribute])) {
+					$newPk[$attribute] = $value;
+				}
+				$args[] = $attribute;
+				$args[] = $value;
+			}
+			$newPk = static::buildKey($newPk);
+			$newKey = static::tableName() . ':a:' . $newPk;
+			// rename index if pk changed
+			if ($newPk != $pk) {
+				$db->executeCommand('MULTI');
+				$db->executeCommand('HMSET', $args);
+				$db->executeCommand('LINSERT', [static::tableName(), 'AFTER', $pk, $newPk]);
+				$db->executeCommand('LREM', [static::tableName(), 0, $pk]);
+				$db->executeCommand('RENAME', [$key, $newKey]);
+				$db->executeCommand('EXEC');
+			} else {
+				$db->executeCommand('HMSET', $args);
+			}
+			$n++;
+		}
+		return $n;
+	}
+
+	/**
+	 * Updates the whole table using the provided counter changes and conditions.
+	 * For example, to increment all customers' age by 1,
+	 *
+	 * ~~~
+	 * Customer::updateAllCounters(['age' => 1]);
+	 * ~~~
+	 *
+	 * @param array $counters the counters to be updated (attribute name => increment value).
+	 * Use negative values if you want to decrement the counters.
+	 * @param array $condition the conditions that will be put in the WHERE part of the UPDATE SQL.
+	 * Please refer to [[ActiveQuery::where()]] on how to specify this parameter.
+	 * @param array $params this parameter is ignored in redis implementation.
+	 * @return integer the number of rows updated
+	 */
+	public static function updateAllCounters($counters, $condition = null, $params = [])
+	{
+		if (empty($counters)) {
+			return 0;
+		}
+		$db = static::getDb();
+		$n=0;
+		foreach(static::fetchPks($condition) as $pk) {
+			$key = static::tableName() . ':a:' . static::buildKey($pk);
+			foreach($counters as $attribute => $value) {
+				$db->executeCommand('HINCRBY', [$key, $attribute, $value]);
+			}
+			$n++;
+		}
+		return $n;
+	}
+
+	/**
+	 * Deletes rows in the table using the provided conditions.
+	 * WARNING: If you do not specify any condition, this method will delete ALL rows in the table.
+	 *
+	 * For example, to delete all customers whose status is 3:
+	 *
+	 * ~~~
+	 * Customer::deleteAll(['status' => 3]);
+	 * ~~~
+	 *
+	 * @param array $condition the conditions that will be put in the WHERE part of the DELETE SQL.
+	 * Please refer to [[ActiveQuery::where()]] on how to specify this parameter.
+	 * @param array $params this parameter is ignored in redis implementation.
+	 * @return integer the number of rows deleted
+	 */
+	public static function deleteAll($condition = null, $params = [])
+	{
+		$db = static::getDb();
+		$attributeKeys = [];
+		$pks = static::fetchPks($condition);
+		$db->executeCommand('MULTI');
+		foreach($pks as $pk) {
+			$pk = static::buildKey($pk);
+			$db->executeCommand('LREM', [static::tableName(), 0, $pk]);
+			$attributeKeys[] = static::tableName() . ':a:' . $pk;
+		}
+		if (empty($attributeKeys)) {
+			$db->executeCommand('EXEC');
+			return 0;
+		}
+		$db->executeCommand('DEL', $attributeKeys);
+		$result = $db->executeCommand('EXEC');
+		return end($result);
+	}
+
+	private static function fetchPks($condition)
+	{
+		$query = static::createQuery();
+		$query->where($condition);
+		$records = $query->asArray()->all(); // TODO limit fetched columns to pk
+		$primaryKey = static::primaryKey();
+
+		$pks = [];
+		foreach($records as $record) {
+			$pk = [];
+			foreach($primaryKey as $key) {
+				$pk[$key] = $record[$key];
+			}
+			$pks[] = $pk;
+		}
+		return $pks;
+	}
+
+	/**
+	 * Builds a normalized key from a given primary key value.
+	 *
+	 * @param mixed $key the key to be normalized
+	 * @return string the generated key
+	 */
+	public static function buildKey($key)
+	{
+		if (is_numeric($key)) {
+			return $key;
+		} elseif (is_string($key)) {
+			return ctype_alnum($key) && StringHelper::strlen($key) <= 32 ? $key : md5($key);
+		} elseif (is_array($key)) {
+			if (count($key) == 1) {
+				return self::buildKey(reset($key));
+			}
+			ksort($key); // ensure order is always the same
+			$isNumeric = true;
+			foreach($key as $value) {
+				if (!is_numeric($value)) {
+					$isNumeric = false;
+				}
+			}
+			if ($isNumeric) {
+				return implode('-', $key);
+			}
+		}
+		return md5(json_encode($key));
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public static function getTableSchema()
+	{
+		throw new NotSupportedException('getTableSchema() is not supported by redis ActiveRecord');
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public static function findBySql($sql, $params = [])
+	{
+		throw new NotSupportedException('findBySql() is not supported by redis ActiveRecord');
+	}
+
+	/**
+	 * Returns a value indicating whether the specified operation is transactional in the current [[scenario]].
+	 * This method will always return false as transactional operations are not supported by redis.
+	 * @param integer $operation the operation to check. Possible values are [[OP_INSERT]], [[OP_UPDATE]] and [[OP_DELETE]].
+	 * @return boolean whether the specified operation is transactional in the current [[scenario]].
+	 */
+	public function isTransactional($operation)
+	{
+		return false;
+	}
+}
diff --git a/framework/yii/redis/ActiveRelation.php b/framework/yii/redis/ActiveRelation.php
new file mode 100644
index 0000000..b2f5cea
--- /dev/null
+++ b/framework/yii/redis/ActiveRelation.php
@@ -0,0 +1,67 @@
+<?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
+namespace yii\redis;
+
+use yii\db\ActiveRelationInterface;
+use yii\db\ActiveRelationTrait;
+
+/**
+ * ActiveRelation represents a relation between two Active Record classes.
+ *
+ * ActiveRelation instances are usually created by calling [[ActiveRecord::hasOne()]] and
+ * [[ActiveRecord::hasMany()]]. An Active Record class declares a relation by defining
+ * a getter method which calls one of the above methods and returns the created ActiveRelation object.
+ *
+ * A relation is specified by [[link]] which represents the association between columns
+ * of different tables; and the multiplicity of the relation is indicated by [[multiple]].
+ *
+ * If a relation involves a pivot table, it may be specified by [[via()]] or [[viaTable()]] method.
+ *
+ * @author Carsten Brandt <mail@cebe.cc>
+ * @since 2.0
+ */
+class ActiveRelation extends ActiveQuery implements ActiveRelationInterface
+{
+	use ActiveRelationTrait;
+
+	/**
+	 * Executes a script created by [[LuaScriptBuilder]]
+	 * @param Connection $db the database connection used to execute the query.
+	 * If this parameter is not given, the `db` application component will be used.
+	 * @param string $type the type of the script to generate
+	 * @param null $column
+	 * @return array|bool|null|string
+	 */
+	protected function executeScript($db, $type, $column=null)
+	{
+		if ($this->primaryModel !== null) {
+			// lazy loading
+			if ($this->via instanceof self) {
+				// via pivot table
+				$viaModels = $this->via->findPivotRows([$this->primaryModel]);
+				$this->filterByModels($viaModels);
+			} elseif (is_array($this->via)) {
+				// via relation
+				/** @var ActiveRelation $viaQuery */
+				list($viaName, $viaQuery) = $this->via;
+				if ($viaQuery->multiple) {
+					$viaModels = $viaQuery->all();
+					$this->primaryModel->populateRelation($viaName, $viaModels);
+				} else {
+					$model = $viaQuery->one();
+					$this->primaryModel->populateRelation($viaName, $model);
+					$viaModels = $model === null ? [] : [$model];
+				}
+				$this->filterByModels($viaModels);
+			} else {
+				$this->filterByModels([$this->primaryModel]);
+			}
+		}
+		return parent::executeScript($db, $type, $column);
+	}
+}
diff --git a/framework/yii/redis/Connection.php b/framework/yii/redis/Connection.php
index 140f985..371b8bc 100644
--- a/framework/yii/redis/Connection.php
+++ b/framework/yii/redis/Connection.php
@@ -1,9 +1,7 @@
 <?php
 /**
- * Connection class file
- *
  * @link http://www.yiiframework.com/
- * @copyright Copyright &copy; 2008 Yii Software LLC
+ * @copyright Copyright (c) 2008 Yii Software LLC
  * @license http://www.yiiframework.com/license/
  */
 
@@ -22,8 +20,7 @@ use yii\helpers\Inflector;
  *
  * @property string $driverName Name of the DB driver. This property is read-only.
  * @property boolean $isActive Whether the DB connection is established. This property is read-only.
- * @property Transaction $transaction The currently active transaction. Null if no active transaction. This
- * property is read-only.
+ * @property LuaScriptBuilder $luaScriptBuilder This property is read-only.
  *
  * @author Carsten Brandt <mail@cebe.cc>
  * @since 2.0
@@ -203,10 +200,6 @@ class Connection extends Component
 		'ZUNIONSTORE', // destination numkeys key [key ...] [WEIGHTS weight [weight ...]] [AGGREGATE SUM|MIN|MAX] Add multiple sorted sets and store the resulting sorted set in a new key
 	];
 	/**
-	 * @var Transaction the currently active transaction
-	 */
-	private $_transaction;
-	/**
 	 * @var resource redis socket connection
 	 */
 	private $_socket;
@@ -283,7 +276,6 @@ class Connection extends Component
 			$this->executeCommand('QUIT');
 			stream_socket_shutdown($this->_socket, STREAM_SHUT_RDWR);
 			$this->_socket = null;
-			$this->_transaction = null;
 		}
 	}
 
@@ -298,27 +290,6 @@ class Connection extends Component
 	}
 
 	/**
-	 * Returns the currently active transaction.
-	 * @return Transaction the currently active transaction. Null if no active transaction.
-	 */
-	public function getTransaction()
-	{
-		return $this->_transaction && $this->_transaction->isActive ? $this->_transaction : null;
-	}
-
-	/**
-	 * Starts a transaction.
-	 * @return Transaction the transaction initiated
-	 */
-	public function beginTransaction()
-	{
-		$this->open();
-		$this->_transaction = new Transaction(['db' => $this]);
-		$this->_transaction->begin();
-		return $this->_transaction;
-	}
-
-	/**
 	 * Returns the name of the DB driver for the current [[dsn]].
 	 * @return string name of the DB driver
 	 */
@@ -332,6 +303,14 @@ class Connection extends Component
 	}
 
 	/**
+	 * @return LuaScriptBuilder
+	 */
+	public function getLuaScriptBuilder()
+	{
+		return new LuaScriptBuilder();
+	}
+
+	/**
 	 *
 	 * @param string $name
 	 * @param array $params
diff --git a/framework/yii/redis/LuaScriptBuilder.php b/framework/yii/redis/LuaScriptBuilder.php
new file mode 100644
index 0000000..81dff3f
--- /dev/null
+++ b/framework/yii/redis/LuaScriptBuilder.php
@@ -0,0 +1,365 @@
+<?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
+namespace yii\redis;
+
+use yii\base\NotSupportedException;
+use yii\db\Exception;
+use yii\db\Expression;
+
+/**
+ * LuaScriptBuilder builds lua scripts used for retrieving data from redis.
+ *
+ * @author Carsten Brandt <mail@cebe.cc>
+ * @since 2.0
+ */
+class LuaScriptBuilder extends \yii\base\Object
+{
+	/**
+	 * Builds a Lua script for finding a list of records
+	 * @param ActiveQuery $query the query used to build the script
+	 * @return string
+	 */
+	public function buildAll($query)
+	{
+		// TODO add support for orderBy
+		/** @var ActiveRecord $modelClass */
+		$modelClass = $query->modelClass;
+		$key = $this->quoteValue($modelClass::tableName() . ':a:');
+		return $this->build($query, "n=n+1 pks[n]=redis.call('HGETALL',$key .. pk)", 'pks');
+	}
+
+	/**
+	 * Builds a Lua script for finding one record
+	 * @param ActiveQuery $query the query used to build the script
+	 * @return string
+	 */
+	public function buildOne($query)
+	{
+		// TODO add support for orderBy
+		/** @var ActiveRecord $modelClass */
+		$modelClass = $query->modelClass;
+		$key = $this->quoteValue($modelClass::tableName() . ':a:');
+		return $this->build($query, "do return redis.call('HGETALL',$key .. pk) end", 'pks');
+	}
+
+	/**
+	 * Builds a Lua script for finding a column
+	 * @param ActiveQuery $query the query used to build the script
+	 * @param string $column name of the column
+	 * @return string
+	 */
+	public function buildColumn($query, $column)
+	{
+		// TODO add support for orderBy and indexBy
+		/** @var ActiveRecord $modelClass */
+		$modelClass = $query->modelClass;
+		$key = $this->quoteValue($modelClass::tableName() . ':a:');
+		return $this->build($query, "n=n+1 pks[n]=redis.call('HGET',$key .. pk," . $this->quoteValue($column) . ")", 'pks');
+	}
+
+	/**
+	 * Builds a Lua script for getting count of records
+	 * @param ActiveQuery $query the query used to build the script
+	 * @return string
+	 */
+	public function buildCount($query)
+	{
+		return $this->build($query, 'n=n+1', 'n');
+	}
+
+	/**
+	 * Builds a Lua script for finding the sum of a column
+	 * @param ActiveQuery $query the query used to build the script
+	 * @param string $column name of the column
+	 * @return string
+	 */
+	public function buildSum($query, $column)
+	{
+		/** @var ActiveRecord $modelClass */
+		$modelClass = $query->modelClass;
+		$key = $this->quoteValue($modelClass::tableName() . ':a:');
+		return $this->build($query, "n=n+redis.call('HGET',$key .. pk," . $this->quoteValue($column) . ")", 'n');
+	}
+
+	/**
+	 * Builds a Lua script for finding the average of a column
+	 * @param ActiveQuery $query the query used to build the script
+	 * @param string $column name of the column
+	 * @return string
+	 */
+	public function buildAverage($query, $column)
+	{
+		/** @var ActiveRecord $modelClass */
+		$modelClass = $query->modelClass;
+		$key = $this->quoteValue($modelClass::tableName() . ':a:');
+		return $this->build($query, "n=n+1 if v==nil then v=0 end v=v+redis.call('HGET',$key .. pk," . $this->quoteValue($column) . ")", 'v/n');
+	}
+
+	/**
+	 * Builds a Lua script for finding the min value of a column
+	 * @param ActiveQuery $query the query used to build the script
+	 * @param string $column name of the column
+	 * @return string
+	 */
+	public function buildMin($query, $column)
+	{
+		/** @var ActiveRecord $modelClass */
+		$modelClass = $query->modelClass;
+		$key = $this->quoteValue($modelClass::tableName() . ':a:');
+		return $this->build($query, "n=redis.call('HGET',$key .. pk," . $this->quoteValue($column) . ") if v==nil or n<v then v=n end", 'v');
+	}
+
+	/**
+	 * Builds a Lua script for finding the max value of a column
+	 * @param ActiveQuery $query the query used to build the script
+	 * @param string $column name of the column
+	 * @return string
+	 */
+	public function buildMax($query, $column)
+	{
+		/** @var ActiveRecord $modelClass */
+		$modelClass = $query->modelClass;
+		$key = $this->quoteValue($modelClass::tableName() . ':a:');
+		return $this->build($query, "n=redis.call('HGET',$key .. pk," . $this->quoteValue($column) . ") if v==nil or n>v then v=n end", 'v');
+	}
+
+	/**
+	 * @param ActiveQuery $query the query used to build the script
+	 * @param string $buildResult the lua script for building the result
+	 * @param string $return the lua variable that should be returned
+	 * @return string
+	 */
+	private function build($query, $buildResult, $return)
+	{
+		if (!empty($query->orderBy)) {
+			throw new NotSupportedException('orderBy is currently not supported by redis ActiveRecord.');
+		}
+
+		$columns = [];
+		if ($query->where !== null) {
+			$condition = $this->buildCondition($query->where, $columns);
+		} else {
+			$condition = 'true';
+		}
+
+		$start = $query->offset === null ? 0 : $query->offset;
+		$limitCondition = 'i>' . $start . ($query->limit === null ? '' : ' and i<=' . ($start + $query->limit));
+
+		/** @var ActiveRecord $modelClass */
+		$modelClass = $query->modelClass;
+		$key = $this->quoteValue($modelClass::tableName());
+		$loadColumnValues = '';
+		foreach($columns as $column => $alias) {
+			$loadColumnValues .= "local $alias=redis.call('HGET',$key .. ':a:' .. pk, '$column')\n";
+		}
+
+		return <<<EOF
+local allpks=redis.call('LRANGE',$key,0,-1)
+local pks={}
+local n=0
+local v=nil
+local i=0
+for k,pk in ipairs(allpks) do
+    $loadColumnValues
+    if $condition then
+      i=i+1
+      if $limitCondition then
+        $buildResult
+      end
+    end
+end
+return $return
+EOF;
+	}
+
+	/**
+	 * Adds a column to the list of columns to retrieve and creates an alias
+	 * @param string $column the column name to add
+	 * @param array $columns list of columns given by reference
+	 * @return string the alias generated for the column name
+	 */
+	private function addColumn($column, &$columns)
+	{
+		if (isset($columns[$column])) {
+			return $columns[$column];
+		}
+		$name = 'c' . preg_replace("/[^A-z]+/", "", $column) . count($columns);
+		return $columns[$column] = $name;
+	}
+
+	/**
+	 * Quotes a string value for use in a query.
+	 * Note that if the parameter is not a string or int, it will be returned without change.
+	 * @param string $str string to be quoted
+	 * @return string the properly quoted string
+	 */
+	private function quoteValue($str)
+	{
+		if (!is_string($str) && !is_int($str)) {
+			return $str;
+		}
+
+		return "'" . addcslashes(str_replace("'", "\\'", $str), "\000\n\r\\\032") . "'";
+	}
+
+	/**
+	 * Parses the condition specification and generates the corresponding Lua expression.
+	 * @param string|array $condition the condition specification. Please refer to [[ActiveQuery::where()]]
+	 * on how to specify a condition.
+	 * @param array $columns the list of columns and aliases to be used
+	 * @return string the generated SQL expression
+	 * @throws \yii\db\Exception if the condition is in bad format
+	 * @throws \yii\base\NotSupportedException if the condition is not an array
+	 */
+	public function buildCondition($condition, &$columns)
+	{
+		static $builders = [
+			'and' => 'buildAndCondition',
+			'or' => 'buildAndCondition',
+			'between' => 'buildBetweenCondition',
+			'not between' => 'buildBetweenCondition',
+			'in' => 'buildInCondition',
+			'not in' => 'buildInCondition',
+			'like' => 'buildLikeCondition',
+			'not like' => 'buildLikeCondition',
+			'or like' => 'buildLikeCondition',
+			'or not like' => 'buildLikeCondition',
+		];
+
+		if (!is_array($condition)) {
+			throw new NotSupportedException('Where condition must be an array in redis ActiveRecord.');
+		}
+		if (isset($condition[0])) { // operator format: operator, operand 1, operand 2, ...
+			$operator = strtolower($condition[0]);
+			if (isset($builders[$operator])) {
+				$method = $builders[$operator];
+				array_shift($condition);
+				return $this->$method($operator, $condition, $columns);
+			} else {
+				throw new Exception('Found unknown operator in query: ' . $operator);
+			}
+		} else { // hash format: 'column1' => 'value1', 'column2' => 'value2', ...
+			return $this->buildHashCondition($condition, $columns);
+		}
+	}
+
+	private function buildHashCondition($condition, &$columns)
+	{
+		$parts = [];
+		foreach ($condition as $column => $value) {
+			if (is_array($value)) { // IN condition
+				$parts[] = $this->buildInCondition('in', [$column, $value], $columns);
+			} else {
+				$column = $this->addColumn($column, $columns);
+				if ($value === null) {
+					$parts[] = "$column==nil";
+				} elseif ($value instanceof Expression) {
+					$parts[] = "$column==" . $value->expression;
+				} else {
+					$value = $this->quoteValue($value);
+					$parts[] = "$column==$value";
+				}
+			}
+		}
+		return count($parts) === 1 ? $parts[0] : '(' . implode(') and (', $parts) . ')';
+	}
+
+	private function buildAndCondition($operator, $operands, &$columns)
+	{
+		$parts = [];
+		foreach ($operands as $operand) {
+			if (is_array($operand)) {
+				$operand = $this->buildCondition($operand, $columns);
+			}
+			if ($operand !== '') {
+				$parts[] = $operand;
+			}
+		}
+		if (!empty($parts)) {
+			return '(' . implode(") $operator (", $parts) . ')';
+		} else {
+			return '';
+		}
+	}
+
+	private function buildBetweenCondition($operator, $operands, &$columns)
+	{
+		if (!isset($operands[0], $operands[1], $operands[2])) {
+			throw new Exception("Operator '$operator' requires three operands.");
+		}
+
+		list($column, $value1, $value2) = $operands;
+
+		$value1 = $this->quoteValue($value1);
+		$value2 = $this->quoteValue($value2);
+		$column = $this->addColumn($column, $columns);
+		return "$column >= $value1 and $column <= $value2";
+	}
+
+	private function buildInCondition($operator, $operands, &$columns)
+	{
+		if (!isset($operands[0], $operands[1])) {
+			throw new Exception("Operator '$operator' requires two operands.");
+		}
+
+		list($column, $values) = $operands;
+
+		$values = (array)$values;
+
+		if (empty($values) || $column === []) {
+			return $operator === 'in' ? 'false' : 'true';
+		}
+
+		if (count($column) > 1) {
+			return $this->buildCompositeInCondition($operator, $column, $values, $columns);
+		} elseif (is_array($column)) {
+			$column = reset($column);
+		}
+		$columnAlias = $this->addColumn($column, $columns);
+		$parts = [];
+		foreach ($values as $i => $value) {
+			if (is_array($value)) {
+				$value = isset($value[$column]) ? $value[$column] : null;
+			}
+			if ($value === null) {
+				$parts[] = "$columnAlias==nil";
+			} elseif ($value instanceof Expression) {
+				$parts[] = "$columnAlias==" . $value->expression;
+			} else {
+				$value = $this->quoteValue($value);
+				$parts[] = "$columnAlias==$value";
+			}
+		}
+		$operator = $operator === 'in' ? '' : 'not ';
+		return "$operator(" . implode(' or ', $parts) . ')';
+	}
+
+	protected function buildCompositeInCondition($operator, $inColumns, $values, &$columns)
+	{
+		$vss = [];
+		foreach ($values as $value) {
+			$vs = [];
+			foreach ($inColumns as $column) {
+				$column = $this->addColumn($column, $columns);
+				if (isset($value[$column])) {
+					$vs[] = "$column==" . $this->quoteValue($value[$column]);
+				} else {
+					$vs[] = "$column==nil";
+				}
+			}
+			$vss[] = '(' . implode(' and ', $vs) . ')';
+		}
+		$operator = $operator === 'in' ? '' : 'not ';
+		return "$operator(" . implode(' or ', $vss) . ')';
+	}
+
+	private function buildLikeCondition($operator, $operands, &$columns)
+	{
+		throw new NotSupportedException('LIKE conditions are not suppoerted by redis ActiveRecord.');
+	}
+}
diff --git a/framework/yii/redis/Transaction.php b/framework/yii/redis/Transaction.php
deleted file mode 100644
index 94cff7a..0000000
--- a/framework/yii/redis/Transaction.php
+++ /dev/null
@@ -1,93 +0,0 @@
-<?php
-/**
- * Transaction class file.
- *
- * @link http://www.yiiframework.com/
- * @copyright Copyright &copy; 2008 Yii Software LLC
- * @license http://www.yiiframework.com/license/
- */
-
-namespace yii\redis;
-
-use yii\base\InvalidConfigException;
-use yii\db\Exception;
-
-/**
- * Transaction represents a DB transaction.
- *
- * @property boolean $isActive Whether this transaction is active. Only an active transaction can [[commit()]]
- * or [[rollBack()]]. This property is read-only.
- *
- * @author Carsten Brandt <mail@cebe.cc>
- * @since 2.0
- */
-class Transaction extends \yii\base\Object
-{
-	/**
-	 * @var Connection the database connection that this transaction is associated with.
-	 */
-	public $db;
-	/**
-	 * @var boolean whether this transaction is active. Only an active transaction
-	 * can [[commit()]] or [[rollBack()]]. This property is set true when the transaction is started.
-	 */
-	private $_active = false;
-
-	/**
-	 * Returns a value indicating whether this transaction is active.
-	 * @return boolean whether this transaction is active. Only an active transaction
-	 * can [[commit()]] or [[rollBack()]].
-	 */
-	public function getIsActive()
-	{
-		return $this->_active;
-	}
-
-	/**
-	 * Begins a transaction.
-	 * @throws InvalidConfigException if [[connection]] is null
-	 */
-	public function begin()
-	{
-		if (!$this->_active) {
-			if ($this->db === null) {
-				throw new InvalidConfigException('Transaction::db must be set.');
-			}
-			\Yii::trace('Starting transaction', __CLASS__);
-			$this->db->open();
-			$this->db->createCommand('MULTI')->execute();
-			$this->_active = true;
-		}
-	}
-
-	/**
-	 * Commits a transaction.
-	 * @throws Exception if the transaction or the DB connection is not active.
-	 */
-	public function commit()
-	{
-		if ($this->_active && $this->db && $this->db->isActive) {
-			\Yii::trace('Committing transaction', __CLASS__);
-			$this->db->createCommand('EXEC')->execute();
-			// TODO handle result of EXEC
-			$this->_active = false;
-		} else {
-			throw new Exception('Failed to commit transaction: transaction was inactive.');
-		}
-	}
-
-	/**
-	 * Rolls back a transaction.
-	 * @throws Exception if the transaction or the DB connection is not active.
-	 */
-	public function rollback()
-	{
-		if ($this->_active && $this->db && $this->db->isActive) {
-			\Yii::trace('Rolling back transaction', __CLASS__);
-			$this->db->pdo->commit();
-			$this->_active = false;
-		} else {
-			throw new Exception('Failed to roll back transaction: transaction was inactive.');
-		}
-	}
-}
diff --git a/framework/yii/validators/UniqueValidator.php b/framework/yii/validators/UniqueValidator.php
index 7006cc4..dedceb9 100644
--- a/framework/yii/validators/UniqueValidator.php
+++ b/framework/yii/validators/UniqueValidator.php
@@ -64,13 +64,13 @@ class UniqueValidator extends Validator
 		$className = $this->className === null ? get_class($object) : $this->className;
 		$attributeName = $this->attributeName === null ? $attribute : $this->attributeName;
 
-		$table = $className::getTableSchema();
-		if (($column = $table->getColumn($attributeName)) === null) {
-			throw new InvalidConfigException("Table '{$table->name}' does not have a column named '$attributeName'.");
+		$attributes = $className::attributes();
+		if (!in_array($attributeName, $attributes)) {
+			throw new InvalidConfigException("'$className' does not have an attribute named '$attributeName'.");
 		}
 
 		$query = $className::find();
-		$query->where([$column->name => $value]);
+		$query->where([$attributeName => $value]);
 
 		if (!$object instanceof ActiveRecord || $object->getIsNewRecord()) {
 			// if current $object isn't in the database yet then it's OK just to call exists()
@@ -82,7 +82,7 @@ class UniqueValidator extends Validator
 
 			$n = count($objects);
 			if ($n === 1) {
-				if ($column->isPrimaryKey) {
+				if (in_array($attributeName, $className::primaryKey())) {
 					// primary key is modified and not unique
 					$exists = $object->getOldPrimaryKey() != $object->getPrimaryKey();
 				} else {
diff --git a/tests/unit/data/ar/redis/ActiveRecord.php b/tests/unit/data/ar/redis/ActiveRecord.php
new file mode 100644
index 0000000..9f6d526
--- /dev/null
+++ b/tests/unit/data/ar/redis/ActiveRecord.php
@@ -0,0 +1,26 @@
+<?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
+namespace yiiunit\data\ar\redis;
+
+use yii\redis\Connection;
+
+/**
+ * ActiveRecord is ...
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @since 2.0
+ */
+class ActiveRecord extends \yii\redis\ActiveRecord
+{
+	public static $db;
+
+	public static function getDb()
+	{
+		return self::$db;
+	}
+}
\ No newline at end of file
diff --git a/tests/unit/data/ar/redis/Customer.php b/tests/unit/data/ar/redis/Customer.php
new file mode 100644
index 0000000..b48953f
--- /dev/null
+++ b/tests/unit/data/ar/redis/Customer.php
@@ -0,0 +1,29 @@
+<?php
+
+namespace yiiunit\data\ar\redis;
+
+class Customer extends ActiveRecord
+{
+	const STATUS_ACTIVE = 1;
+	const STATUS_INACTIVE = 2;
+
+	public $status2;
+
+	public static function attributes()
+	{
+		return ['id', 'email', 'name', 'address', 'status'];
+	}
+
+	/**
+	 * @return \yii\redis\ActiveRelation
+	 */
+	public function getOrders()
+	{
+		return $this->hasMany(Order::className(), ['customer_id' => 'id']);
+	}
+
+	public static function active($query)
+	{
+		$query->andWhere(['status' => 1]);
+	}
+}
\ No newline at end of file
diff --git a/tests/unit/data/ar/redis/Item.php b/tests/unit/data/ar/redis/Item.php
new file mode 100644
index 0000000..1163265
--- /dev/null
+++ b/tests/unit/data/ar/redis/Item.php
@@ -0,0 +1,11 @@
+<?php
+
+namespace yiiunit\data\ar\redis;
+
+class Item extends ActiveRecord
+{
+	public static function attributes()
+	{
+		return ['id', 'name', 'category_id'];
+	}
+}
\ No newline at end of file
diff --git a/tests/unit/data/ar/redis/Order.php b/tests/unit/data/ar/redis/Order.php
new file mode 100644
index 0000000..33d289a
--- /dev/null
+++ b/tests/unit/data/ar/redis/Order.php
@@ -0,0 +1,46 @@
+<?php
+
+namespace yiiunit\data\ar\redis;
+
+class Order extends ActiveRecord
+{
+	public static function attributes()
+	{
+		return ['id', 'customer_id', 'create_time', 'total'];
+	}
+
+	public function getCustomer()
+	{
+		return $this->hasOne(Customer::className(), ['id' => 'customer_id']);
+	}
+
+	public function getOrderItems()
+	{
+		return $this->hasMany(OrderItem::className(), ['order_id' => 'id']);
+	}
+
+	public function getItems()
+	{
+		return $this->hasMany(Item::className(), ['id' => 'item_id'])
+			->via('orderItems', function($q) {
+				// additional query configuration
+			});
+	}
+
+	public function getBooks()
+	{
+		return $this->hasMany(Item::className(), ['id' => 'item_id'])
+			->via('orderItems', ['order_id' => 'id']);
+			//->where(['category_id' => 1]);
+	}
+
+	public function beforeSave($insert)
+	{
+		if (parent::beforeSave($insert)) {
+			$this->create_time = time();
+			return true;
+		} else {
+			return false;
+		}
+	}
+}
\ No newline at end of file
diff --git a/tests/unit/data/ar/redis/OrderItem.php b/tests/unit/data/ar/redis/OrderItem.php
new file mode 100644
index 0000000..38def6b
--- /dev/null
+++ b/tests/unit/data/ar/redis/OrderItem.php
@@ -0,0 +1,28 @@
+<?php
+
+namespace yiiunit\data\ar\redis;
+
+use yii\redis\RecordSchema;
+
+class OrderItem extends ActiveRecord
+{
+	public static function primaryKey()
+	{
+		return ['order_id', 'item_id'];
+	}
+
+	public static function attributes()
+	{
+		return ['order_id', 'item_id', 'quantity', 'subtotal'];
+	}
+
+	public function getOrder()
+	{
+		return $this->hasOne(Order::className(), ['id' => 'order_id']);
+	}
+
+	public function getItem()
+	{
+		return $this->hasOne(Item::className(), ['id' => 'item_id']);
+	}
+}
\ No newline at end of file
diff --git a/tests/unit/data/config.php b/tests/unit/data/config.php
index 304c3fc..cb3306f 100644
--- a/tests/unit/data/config.php
+++ b/tests/unit/data/config.php
@@ -29,5 +29,9 @@ return [
 			'password' => 'postgres',
 			'fixture' => __DIR__ . '/postgres.sql',
 		],
+		'redis' => [
+			'dsn' => 'redis://localhost:6379/0',
+			'password' => null,
+		],
 	],
 ];
diff --git a/tests/unit/framework/db/ActiveRecordTest.php b/tests/unit/framework/db/ActiveRecordTest.php
index b2981f2..3de40dd 100644
--- a/tests/unit/framework/db/ActiveRecordTest.php
+++ b/tests/unit/framework/db/ActiveRecordTest.php
@@ -40,6 +40,12 @@ class ActiveRecordTest extends DatabaseTestCase
 		$customer = Customer::find(2);
 		$this->assertTrue($customer instanceof Customer);
 		$this->assertEquals('user2', $customer->name);
+		$customer = Customer::find(5);
+		$this->assertNull($customer);
+
+		// query scalar
+		$customerName = Customer::find()->where(array('id' => 2))->select('name')->scalar();
+		$this->assertEquals('user2', $customerName);
 
 		// find by column values
 		$customer = Customer::find(['id' => 2, 'name' => 'user2']);
diff --git a/tests/unit/framework/redis/ActiveRecordTest.php b/tests/unit/framework/redis/ActiveRecordTest.php
new file mode 100644
index 0000000..31907f7
--- /dev/null
+++ b/tests/unit/framework/redis/ActiveRecordTest.php
@@ -0,0 +1,466 @@
+<?php
+
+namespace yiiunit\framework\redis;
+
+use yii\db\Query;
+use yii\redis\ActiveQuery;
+use yiiunit\data\ar\redis\ActiveRecord;
+use yiiunit\data\ar\redis\Customer;
+use yiiunit\data\ar\redis\OrderItem;
+use yiiunit\data\ar\redis\Order;
+use yiiunit\data\ar\redis\Item;
+
+/**
+ * @group redis
+ */
+class ActiveRecordTest extends RedisTestCase
+{
+	public function setUp()
+	{
+		parent::setUp();
+		ActiveRecord::$db = $this->getConnection();
+
+		$customer = new Customer();
+		$customer->setAttributes(['email' => 'user1@example.com', 'name' => 'user1', 'address' => 'address1', 'status' => 1], false);
+		$customer->save(false);
+		$customer = new Customer();
+		$customer->setAttributes(['email' => 'user2@example.com', 'name' => 'user2', 'address' => 'address2', 'status' => 1], false);
+		$customer->save(false);
+		$customer = new Customer();
+		$customer->setAttributes(['email' => 'user3@example.com', 'name' => 'user3', 'address' => 'address3', 'status' => 2], false);
+		$customer->save(false);
+
+//		INSERT INTO tbl_category (name) VALUES ('Books');
+//		INSERT INTO tbl_category (name) VALUES ('Movies');
+
+		$item = new Item();
+		$item->setAttributes(['name' => 'Agile Web Application Development with Yii1.1 and PHP5', 'category_id' => 1], false);
+		$item->save(false);
+		$item = new Item();
+		$item->setAttributes(['name' => 'Yii 1.1 Application Development Cookbook', 'category_id' => 1], false);
+		$item->save(false);
+		$item = new Item();
+		$item->setAttributes(['name' => 'Ice Age', 'category_id' => 2], false);
+		$item->save(false);
+		$item = new Item();
+		$item->setAttributes(['name' => 'Toy Story', 'category_id' => 2], false);
+		$item->save(false);
+		$item = new Item();
+		$item->setAttributes(['name' => 'Cars', 'category_id' => 2], false);
+		$item->save(false);
+
+		$order = new Order();
+		$order->setAttributes(['customer_id' => 1, 'create_time' => 1325282384, 'total' => 110.0], false);
+		$order->save(false);
+		$order = new Order();
+		$order->setAttributes(['customer_id' => 2, 'create_time' => 1325334482, 'total' => 33.0], false);
+		$order->save(false);
+		$order = new Order();
+		$order->setAttributes(['customer_id' => 2, 'create_time' => 1325502201, 'total' => 40.0], false);
+		$order->save(false);
+
+		$orderItem = new OrderItem();
+		$orderItem->setAttributes(['order_id' => 1, 'item_id' => 1, 'quantity' => 1, 'subtotal' => 30.0], false);
+		$orderItem->save(false);
+		$orderItem = new OrderItem();
+		$orderItem->setAttributes(['order_id' => 1, 'item_id' => 2, 'quantity' => 2, 'subtotal' => 40.0], false);
+		$orderItem->save(false);
+		$orderItem = new OrderItem();
+		$orderItem->setAttributes(['order_id' => 2, 'item_id' => 4, 'quantity' => 1, 'subtotal' => 10.0], false);
+		$orderItem->save(false);
+		$orderItem = new OrderItem();
+		$orderItem->setAttributes(['order_id' => 2, 'item_id' => 5, 'quantity' => 1, 'subtotal' => 15.0], false);
+		$orderItem->save(false);
+		$orderItem = new OrderItem();
+		$orderItem->setAttributes(['order_id' => 2, 'item_id' => 3, 'quantity' => 1, 'subtotal' => 8.0], false);
+		$orderItem->save(false);
+		$orderItem = new OrderItem();
+		$orderItem->setAttributes(['order_id' => 3, 'item_id' => 2, 'quantity' => 1, 'subtotal' => 40.0], false);
+		$orderItem->save(false);
+	}
+
+	public function testFind()
+	{
+		// find one
+		$result = Customer::find();
+		$this->assertTrue($result instanceof ActiveQuery);
+		$customer = $result->one();
+		$this->assertTrue($customer instanceof Customer);
+
+		// find all
+		$customers = Customer::find()->all();
+		$this->assertEquals(3, count($customers));
+		$this->assertTrue($customers[0] instanceof Customer);
+		$this->assertTrue($customers[1] instanceof Customer);
+		$this->assertTrue($customers[2] instanceof Customer);
+
+		// find by a single primary key
+		$customer = Customer::find(2);
+		$this->assertTrue($customer instanceof Customer);
+		$this->assertEquals('user2', $customer->name);
+		$customer = Customer::find(5);
+		$this->assertNull($customer);
+		$customer = Customer::find(['id' => [5, 6, 1]]);
+		$this->assertEquals(1, count($customer));
+		$customer = Customer::find()->where(['id' => [5, 6, 1]])->one();
+		$this->assertNotNull($customer);
+
+		// query scalar
+		$customerName = Customer::find()->where(['id' => 2])->scalar('name');
+		$this->assertEquals('user2', $customerName);
+
+		// find by column values
+		$customer = Customer::find(['id' => 2, 'name' => 'user2']);
+		$this->assertTrue($customer instanceof Customer);
+		$this->assertEquals('user2', $customer->name);
+		$customer = Customer::find(['id' => 2, 'name' => 'user1']);
+		$this->assertNull($customer);
+		$customer = Customer::find(['id' => 5]);
+		$this->assertNull($customer);
+
+		// find by attributes
+		$customer = Customer::find()->where(['name' => 'user2'])->one();
+		$this->assertTrue($customer instanceof Customer);
+		$this->assertEquals(2, $customer->id);
+
+		// find count, sum, average, min, max, scalar
+		$this->assertEquals(3, Customer::find()->count());
+		$this->assertEquals(6, Customer::find()->sum('id'));
+		$this->assertEquals(2, Customer::find()->average('id'));
+		$this->assertEquals(1, Customer::find()->min('id'));
+		$this->assertEquals(3, Customer::find()->max('id'));
+
+		// scope
+		$this->assertEquals(2, Customer::find()->active()->count());
+
+		// asArray
+		$customer = Customer::find()->where(['id' => 2])->asArray()->one();
+		$this->assertEquals(array(
+			'id' => '2',
+			'email' => 'user2@example.com',
+			'name' => 'user2',
+			'address' => 'address2',
+			'status' => '1',
+		), $customer);
+
+		// indexBy
+		$customers = Customer::find()->indexBy('name')->all();
+		$this->assertEquals(3, count($customers));
+		$this->assertTrue($customers['user1'] instanceof Customer);
+		$this->assertTrue($customers['user2'] instanceof Customer);
+		$this->assertTrue($customers['user3'] instanceof Customer);
+
+		// indexBy callable
+		$customers = Customer::find()->indexBy(function ($customer) {
+			return $customer->id . '-' . $customer->name;
+//		})->orderBy('id')->all();
+		})->all();
+		$this->assertEquals(3, count($customers));
+		$this->assertTrue($customers['1-user1'] instanceof Customer);
+		$this->assertTrue($customers['2-user2'] instanceof Customer);
+		$this->assertTrue($customers['3-user3'] instanceof Customer);
+	}
+
+	public function testFindCount()
+	{
+		$this->assertEquals(3, Customer::find()->count());
+		$this->assertEquals(1, Customer::find()->limit(1)->count());
+		$this->assertEquals(2, Customer::find()->limit(2)->count());
+		$this->assertEquals(1, Customer::find()->offset(2)->limit(2)->count());
+	}
+
+	public function testFindLimit()
+	{
+		// all()
+		$customers = Customer::find()->all();
+		$this->assertEquals(3, count($customers));
+
+		$customers = Customer::find()->limit(1)->all();
+		$this->assertEquals(1, count($customers));
+		$this->assertEquals('user1', $customers[0]->name);
+
+		$customers = Customer::find()->limit(1)->offset(1)->all();
+		$this->assertEquals(1, count($customers));
+		$this->assertEquals('user2', $customers[0]->name);
+
+		$customers = Customer::find()->limit(1)->offset(2)->all();
+		$this->assertEquals(1, count($customers));
+		$this->assertEquals('user3', $customers[0]->name);
+
+		$customers = Customer::find()->limit(2)->offset(1)->all();
+		$this->assertEquals(2, count($customers));
+		$this->assertEquals('user2', $customers[0]->name);
+		$this->assertEquals('user3', $customers[1]->name);
+
+		$customers = Customer::find()->limit(2)->offset(3)->all();
+		$this->assertEquals(0, count($customers));
+
+		// one()
+		$customer = Customer::find()->one();
+		$this->assertEquals('user1', $customer->name);
+
+		$customer = Customer::find()->offset(0)->one();
+		$this->assertEquals('user1', $customer->name);
+
+		$customer = Customer::find()->offset(1)->one();
+		$this->assertEquals('user2', $customer->name);
+
+		$customer = Customer::find()->offset(2)->one();
+		$this->assertEquals('user3', $customer->name);
+
+		$customer = Customer::find()->offset(3)->one();
+		$this->assertNull($customer);
+
+	}
+
+	public function testFindComplexCondition()
+	{
+		$this->assertEquals(2, Customer::find()->where(['OR', ['id' => 1], ['id' => 2]])->count());
+		$this->assertEquals(2, count(Customer::find()->where(['OR', ['id' => 1], ['id' => 2]])->all()));
+
+		$this->assertEquals(2, Customer::find()->where(['id' => [1,2]])->count());
+		$this->assertEquals(2, count(Customer::find()->where(['id' => [1,2]])->all()));
+
+		$this->assertEquals(1, Customer::find()->where(['AND', ['id' => [2,3]], ['BETWEEN', 'status', 2, 4]])->count());
+		$this->assertEquals(1, count(Customer::find()->where(['AND', ['id' => [2,3]], ['BETWEEN', 'status', 2, 4]])->all()));
+	}
+
+	public function testSum()
+	{
+		$this->assertEquals(6, OrderItem::find()->count());
+		$this->assertEquals(7, OrderItem::find()->sum('quantity'));
+	}
+
+	public function testFindColumn()
+	{
+		$this->assertEquals(['user1', 'user2', 'user3'], Customer::find()->column('name'));
+//		TODO $this->assertEquals(['user3', 'user2', 'user1'], Customer::find()->orderBy(['name' => SORT_DESC])->column('name'));
+	}
+
+	public function testExists()
+	{
+		$this->assertTrue(Customer::find()->where(['id' => 2])->exists());
+		$this->assertFalse(Customer::find()->where(['id' => 5])->exists());
+	}
+
+	public function testFindLazy()
+	{
+		/** @var $customer Customer */
+		$customer = Customer::find(2);
+		$orders = $customer->orders;
+		$this->assertEquals(2, count($orders));
+
+		$orders = $customer->getOrders()->where(['id' => 3])->all();
+		$this->assertEquals(1, count($orders));
+		$this->assertEquals(3, $orders[0]->id);
+	}
+
+	public function testFindEager()
+	{
+		$customers = Customer::find()->with('orders')->all();
+		$this->assertEquals(3, count($customers));
+		$this->assertEquals(1, count($customers[0]->orders));
+		$this->assertEquals(2, count($customers[1]->orders));
+	}
+
+	public function testFindLazyVia()
+	{
+		/** @var $order Order */
+		$order = Order::find(1);
+		$this->assertEquals(1, $order->id);
+		$this->assertEquals(2, count($order->items));
+		$this->assertEquals(1, $order->items[0]->id);
+		$this->assertEquals(2, $order->items[1]->id);
+
+		$order = Order::find(1);
+		$order->id = 100;
+		$this->assertEquals([], $order->items);
+	}
+
+	public function testFindEagerViaRelation()
+	{
+		$orders = Order::find()->with('items')->all();
+		$this->assertEquals(3, count($orders));
+		$order = $orders[0];
+		$this->assertEquals(1, $order->id);
+		$this->assertEquals(2, count($order->items));
+		$this->assertEquals(1, $order->items[0]->id);
+		$this->assertEquals(2, $order->items[1]->id);
+	}
+
+	public function testFindNestedRelation()
+	{
+		$customers = Customer::find()->with('orders', 'orders.items')->all();
+		$this->assertEquals(3, count($customers));
+		$this->assertEquals(1, count($customers[0]->orders));
+		$this->assertEquals(2, count($customers[1]->orders));
+		$this->assertEquals(0, count($customers[2]->orders));
+		$this->assertEquals(2, count($customers[0]->orders[0]->items));
+		$this->assertEquals(3, count($customers[1]->orders[0]->items));
+		$this->assertEquals(1, count($customers[1]->orders[1]->items));
+	}
+
+	public function testLink()
+	{
+		$customer = Customer::find(2);
+		$this->assertEquals(2, count($customer->orders));
+
+		// has many
+		$order = new Order;
+		$order->total = 100;
+		$this->assertTrue($order->isNewRecord);
+		$customer->link('orders', $order);
+		$this->assertEquals(3, count($customer->orders));
+		$this->assertFalse($order->isNewRecord);
+		$this->assertEquals(3, count($customer->getOrders()->all()));
+		$this->assertEquals(2, $order->customer_id);
+
+		// belongs to
+		$order = new Order;
+		$order->total = 100;
+		$this->assertTrue($order->isNewRecord);
+		$customer = Customer::find(1);
+		$this->assertNull($order->customer);
+		$order->link('customer', $customer);
+		$this->assertFalse($order->isNewRecord);
+		$this->assertEquals(1, $order->customer_id);
+		$this->assertEquals(1, $order->customer->id);
+
+		// via model
+		$order = Order::find(1);
+		$this->assertEquals(2, count($order->items));
+		$this->assertEquals(2, count($order->orderItems));
+		$orderItem = OrderItem::find(['order_id' => 1, 'item_id' => 3]);
+		$this->assertNull($orderItem);
+		$item = Item::find(3);
+		$order->link('items', $item, ['quantity' => 10, 'subtotal' => 100]);
+		$this->assertEquals(3, count($order->items));
+		$this->assertEquals(3, count($order->orderItems));
+		$orderItem = OrderItem::find(['order_id' => 1, 'item_id' => 3]);
+		$this->assertTrue($orderItem instanceof OrderItem);
+		$this->assertEquals(10, $orderItem->quantity);
+		$this->assertEquals(100, $orderItem->subtotal);
+	}
+
+	public function testUnlink()
+	{
+		// has many
+		$customer = Customer::find(2);
+		$this->assertEquals(2, count($customer->orders));
+		$customer->unlink('orders', $customer->orders[1], true);
+		$this->assertEquals(1, count($customer->orders));
+		$this->assertNull(Order::find(3));
+
+		// via model
+		$order = Order::find(2);
+		$this->assertEquals(3, count($order->items));
+		$this->assertEquals(3, count($order->orderItems));
+		$order->unlink('items', $order->items[2], true);
+		$this->assertEquals(2, count($order->items));
+		$this->assertEquals(2, count($order->orderItems));
+	}
+
+	public function testInsert()
+	{
+		$customer = new Customer;
+		$customer->email = 'user4@example.com';
+		$customer->name = 'user4';
+		$customer->address = 'address4';
+
+		$this->assertNull($customer->id);
+		$this->assertTrue($customer->isNewRecord);
+
+		$customer->save();
+
+		$this->assertEquals(4, $customer->id);
+		$this->assertFalse($customer->isNewRecord);
+	}
+
+	// TODO test serial column incr
+
+	public function testUpdate()
+	{
+		// save
+		$customer = Customer::find(2);
+		$this->assertTrue($customer instanceof Customer);
+		$this->assertEquals('user2', $customer->name);
+		$this->assertFalse($customer->isNewRecord);
+		$customer->name = 'user2x';
+		$customer->save();
+		$this->assertEquals('user2x', $customer->name);
+		$this->assertFalse($customer->isNewRecord);
+		$customer2 = Customer::find(2);
+		$this->assertEquals('user2x', $customer2->name);
+
+		// updateAll
+		$customer = Customer::find(3);
+		$this->assertEquals('user3', $customer->name);
+		$ret = Customer::updateAll(array(
+			'name' => 'temp',
+		), ['id' => 3]);
+		$this->assertEquals(1, $ret);
+		$customer = Customer::find(3);
+		$this->assertEquals('temp', $customer->name);
+	}
+
+	public function testUpdateCounters()
+	{
+		// updateCounters
+		$pk = ['order_id' => 2, 'item_id' => 4];
+		$orderItem = OrderItem::find($pk);
+		$this->assertEquals(1, $orderItem->quantity);
+		$ret = $orderItem->updateCounters(['quantity' => -1]);
+		$this->assertTrue($ret);
+		$this->assertEquals(0, $orderItem->quantity);
+		$orderItem = OrderItem::find($pk);
+		$this->assertEquals(0, $orderItem->quantity);
+
+		// updateAllCounters
+		$pk = ['order_id' => 1, 'item_id' => 2];
+		$orderItem = OrderItem::find($pk);
+		$this->assertEquals(2, $orderItem->quantity);
+		$ret = OrderItem::updateAllCounters(array(
+			'quantity' => 3,
+			'subtotal' => -10,
+		), $pk);
+		$this->assertEquals(1, $ret);
+		$orderItem = OrderItem::find($pk);
+		$this->assertEquals(5, $orderItem->quantity);
+		$this->assertEquals(30, $orderItem->subtotal);
+	}
+
+	public function testUpdatePk()
+	{
+		// updateCounters
+		$pk = ['order_id' => 2, 'item_id' => 4];
+		$orderItem = OrderItem::find($pk);
+		$this->assertEquals(2, $orderItem->order_id);
+		$this->assertEquals(4, $orderItem->item_id);
+
+		$orderItem->order_id = 2;
+		$orderItem->item_id = 10;
+		$orderItem->save();
+
+		$this->assertNull(OrderItem::find($pk));
+		$this->assertNotNull(OrderItem::find(['order_id' => 2, 'item_id' => 10]));
+	}
+
+	public function testDelete()
+	{
+		// delete
+		$customer = Customer::find(2);
+		$this->assertTrue($customer instanceof Customer);
+		$this->assertEquals('user2', $customer->name);
+		$customer->delete();
+		$customer = Customer::find(2);
+		$this->assertNull($customer);
+
+		// deleteAll
+		$customers = Customer::find()->all();
+		$this->assertEquals(2, count($customers));
+		$ret = Customer::deleteAll();
+		$this->assertEquals(2, $ret);
+		$customers = Customer::find()->all();
+		$this->assertEquals(0, count($customers));
+	}
+}
\ No newline at end of file
diff --git a/tests/unit/framework/redis/RedisConnectionTest.php b/tests/unit/framework/redis/RedisConnectionTest.php
new file mode 100644
index 0000000..af39e0e
--- /dev/null
+++ b/tests/unit/framework/redis/RedisConnectionTest.php
@@ -0,0 +1,69 @@
+<?php
+
+namespace yiiunit\framework\redis;
+
+use yii\redis\Connection;
+
+/**
+ * @group redis
+ */
+class RedisConnectionTest extends RedisTestCase
+{
+	/**
+	 * Empty DSN should throw exception
+	 * @expectedException \yii\base\InvalidConfigException
+	 */
+	public function testEmptyDSN()
+	{
+		$db = new Connection();
+		$db->open();
+	}
+
+	/**
+	 * test connection to redis and selection of db
+	 */
+	public function testConnect()
+	{
+		$db = new Connection();
+		$db->dsn = 'redis://localhost:6379';
+		$db->open();
+		$this->assertTrue($db->ping());
+		$db->set('YIITESTKEY', 'YIITESTVALUE');
+		$db->close();
+
+		$db = new Connection();
+		$db->dsn = 'redis://localhost:6379/0';
+		$db->open();
+		$this->assertEquals('YIITESTVALUE', $db->get('YIITESTKEY'));
+		$db->close();
+
+		$db = new Connection();
+		$db->dsn = 'redis://localhost:6379/1';
+		$db->open();
+		$this->assertNull($db->get('YIITESTKEY'));
+		$db->close();
+	}
+
+	public function keyValueData()
+	{
+		return array(
+			array(123),
+			array(-123),
+			array(0),
+			array('test'),
+			array("test\r\ntest"),
+			array(''),
+		);
+	}
+
+	/**
+	 * @dataProvider keyValueData
+	 */
+	public function testStoreGet($data)
+	{
+		$db = $this->getConnection(true);
+
+		$db->set('hi', $data);
+		$this->assertEquals($data, $db->get('hi'));
+	}
+}
\ No newline at end of file
diff --git a/tests/unit/framework/redis/RedisTestCase.php b/tests/unit/framework/redis/RedisTestCase.php
new file mode 100644
index 0000000..12e539d
--- /dev/null
+++ b/tests/unit/framework/redis/RedisTestCase.php
@@ -0,0 +1,51 @@
+<?php
+
+namespace yiiunit\framework\redis;
+
+use yii\redis\Connection;
+use yiiunit\TestCase;
+
+/**
+ * RedisTestCase is the base class for all redis related test cases
+ */
+abstract class RedisTestCase extends TestCase
+{
+	protected function setUp()
+	{
+		$this->mockApplication();
+
+		$databases = $this->getParam('databases');
+		$params = isset($databases['redis']) ? $databases['redis'] : null;
+		if ($params === null || !isset($params['dsn'])) {
+			$this->markTestSkipped('No redis server connection configured.');
+		}
+		$dsn = explode('/', $params['dsn']);
+		$host = $dsn[2];
+		if (strpos($host, ':')===false) {
+			$host .= ':6379';
+		}
+		if(!@stream_socket_client($host, $errorNumber, $errorDescription, 0.5)) {
+			$this->markTestSkipped('No redis server running at ' . $params['dsn'] . ' : ' . $errorNumber . ' - ' . $errorDescription);
+		}
+
+		parent::setUp();
+	}
+
+	/**
+	 * @param bool $reset whether to clean up the test database
+	 * @return Connection
+	 */
+	public function getConnection($reset = true)
+	{
+		$databases = $this->getParam('databases');
+		$params = isset($databases['redis']) ? $databases['redis'] : array();
+		$db = new Connection;
+		$db->dsn = $params['dsn'];
+		$db->password = $params['password'];
+		if ($reset) {
+			$db->open();
+			$db->flushall();
+		}
+		return $db;
+	}
+}
\ No newline at end of file