| public createIndex ( array | string $columns, array $options = [] ) : boolean | ||
| $columns | array | string | column name or list of column names. If array is given, each element in the array has as key the field name, and as value either 1 for ascending sort, or -1 for descending sort. You can specify field using native numeric key with the field name as a value, in this case ascending sort will be used. For example: ```php [ 'name', 'status' => -1, ] ``` |
| $options | array | list of options in format: optionName => optionValue. |
| return | boolean | whether the operation successful. |
public function createIndex($columns, $options = [])
{
$index = array_merge(['key' => $columns], $options);
return $this->database->createCommand()->createIndexes($this->name, [$index]);
}