/**
* 创建索引
*
* @param string $keys
* @param string $options
* @return string
*/
public function ensureIndex($keys, $options)
{
if (!empty($keys)) {
$keys = $this->toArray($keys);
} else {
$keys = trim($keys);
}
if (!empty($options)) {
$options = $this->toArray($options);
} else {
$options = array('background' => true);
}
$rst = $this->_model->ensureIndex($keys, $options);
return $this->result($rst);
}
