public function delete($query, array $options = array()) {
		$this->_checkConnection();
		$_config = $this->_config;
		$defaults = array('justOne' => false,
			'w' => $_config['w'],
			'wTimeoutMS' => $_config['wTimeoutMS'],
			'fsync' => false
		);
		$options = array_intersect_key($options + $defaults, $defaults);
		$params = compact('query', 'options');

		return $this->_filter(__METHOD__, $params, function($self, $params) use ($_config) {
			$query = $params['query'];
			$options = $params['options'];
			$args = $query->export($self, array('keys' => array('source', 'conditions')));
			$source = $args['source'];
			$conditions = $args['conditions'];

			if ($source === "{$_config['gridPrefix']}.files") {
				$result = $self->invokeMethod('_deleteFile', array($conditions));
			} else {
				$result = $self->connection->{$args['source']}->remove($conditions, $options);
				$result = $self->invokeMethod('_ok', array($result));
			}
			if ($result && $query->entity()) {
				$query->entity()->sync(null, array(), array('dematerialize' => true));
			}
			return $result;
		});
	}