diff --git a/extensions/mongo/Collection.php b/extensions/mongo/Collection.php
index fc15b89..fd4f332 100644
--- a/extensions/mongo/Collection.php
+++ b/extensions/mongo/Collection.php
@@ -79,6 +79,51 @@ class Collection extends Object
 	}
 
 	/**
+	 * Inserts several new rows into collection.
+	 * @param array $rows array of arrays or objects to be inserted.
+	 * @param array $options list of options in format: optionName => optionValue.
+	 * @return array inserted data, each row will have "_id" key assigned to it.
+	 * @throws Exception on failure.
+	 */
+	public function batchInsert($rows, $options = [])
+	{
+		$token = 'Inserting batch data into ' . $this->mongoCollection->getName();
+		Yii::info($token, __METHOD__);
+		try {
+			Yii::beginProfile($token, __METHOD__);
+			$this->tryResultError($this->mongoCollection->batchInsert($rows, $options));
+			Yii::endProfile($token, __METHOD__);
+			return $rows;
+		} catch (\Exception $e) {
+			Yii::endProfile($token, __METHOD__);
+			throw new Exception($e->getMessage(), (int)$e->getCode(), $e);
+		}
+	}
+
+	/**
+	 * Updates the rows, which matches given criteria by given data.
+	 * @param array $criteria description of the objects to update.
+	 * @param array $newData the object with which to update the matching records.
+	 * @param array $options list of options in format: optionName => optionValue.
+	 * @return boolean whether operation was successful.
+	 * @throws Exception on failure.
+	 */
+	public function update($criteria, $newData, $options = [])
+	{
+		$token = 'Updating data in ' . $this->mongoCollection->getName();
+		Yii::info($token, __METHOD__);
+		try {
+			Yii::beginProfile($token, __METHOD__);
+			$this->mongoCollection->update($criteria, $newData, $options);
+			Yii::endProfile($token, __METHOD__);
+			return true;
+		} catch (\Exception $e) {
+			Yii::endProfile($token, __METHOD__);
+			throw new Exception($e->getMessage(), (int)$e->getCode(), $e);
+		}
+	}
+
+	/**
 	 * Update the existing database data, otherwise insert this data
 	 * @param array|object $data data to be updated/inserted.
 	 * @param array $options list of options in format: optionName => optionValue.
diff --git a/extensions/mongo/Query.php b/extensions/mongo/Query.php
index 1bdaf40..7d9920d 100644
--- a/extensions/mongo/Query.php
+++ b/extensions/mongo/Query.php
@@ -91,7 +91,7 @@ class Query extends Component implements QueryInterface
 		if (!empty($this->orderBy)) {
 			$sort = [];
 			foreach ($this->orderBy as $fieldName => $sortOrder) {
-				$sort[$fieldName] = $sortOrder === SORT_DESC ? -1 : 1;
+				$sort[$fieldName] = $sortOrder === SORT_DESC ? \MongoCollection::DESCENDING : \MongoCollection::ASCENDING;
 			}
 			$cursor->sort($this->orderBy);
 		}
diff --git a/tests/unit/extensions/mongo/CollectionTest.php b/tests/unit/extensions/mongo/CollectionTest.php
index 5dd7d59..053ee7e 100644
--- a/tests/unit/extensions/mongo/CollectionTest.php
+++ b/tests/unit/extensions/mongo/CollectionTest.php
@@ -15,6 +15,13 @@ class CollectionTest extends MongoTestCase
 
 	// Tests :
 
+	public function testFind()
+	{
+		$collection = $this->getConnection()->getCollection('customer');
+		$cursor = $collection->find();
+		$this->assertTrue($cursor instanceof \MongoCursor);
+	}
+
 	public function testInsert()
 	{
 		$collection = $this->getConnection()->getCollection('customer');
@@ -44,6 +51,28 @@ class CollectionTest extends MongoTestCase
 		$this->assertEquals($id, $rows[0]['_id']);
 	}
 
+	/**
+	 * @depends testFind
+	 */
+	public function testBatchInsert()
+	{
+		$collection = $this->getConnection()->getCollection('customer');
+		$rows = [
+			[
+				'name' => 'customer 1',
+				'address' => 'customer 1 address',
+			],
+			[
+				'name' => 'customer 2',
+				'address' => 'customer 2 address',
+			],
+		];
+		$insertedRows = $collection->batchInsert($rows);
+		$this->assertTrue($insertedRows[0]['_id'] instanceof \MongoId);
+		$this->assertTrue($insertedRows[1]['_id'] instanceof \MongoId);
+		$this->assertEquals(count($rows), $collection->find()->count());
+	}
+
 	public function testSave()
 	{
 		$collection = $this->getConnection()->getCollection('customer');
@@ -59,7 +88,7 @@ class CollectionTest extends MongoTestCase
 	/**
 	 * @depends testSave
 	 */
-	public function testUpdate()
+	public function testUpdateBySave()
 	{
 		$collection = $this->getConnection()->getCollection('customer');
 		$data = [
@@ -93,4 +122,25 @@ class CollectionTest extends MongoTestCase
 		$rows = $collection->findAll();
 		$this->assertEquals(0, count($rows));
 	}
+
+	/**
+	 * @depends testFindAll
+	 */
+	public function testUpdate()
+	{
+		$collection = $this->getConnection()->getCollection('customer');
+		$data = [
+			'name' => 'customer 1',
+			'address' => 'customer 1 address',
+		];
+		$id = $collection->insert($data);
+
+		$newData = [
+			'name' => 'new name'
+		];
+		$collection->update(['_id' => $id], $newData);
+
+		list($row) = $collection->findAll();
+		$this->assertEquals($newData['name'], $row['name']);
+	}
 }
\ No newline at end of file