Schema::_createKeys

protected Schema::_createKeys($table, $new_keys)

protected function _createKeys($table, $new_keys) {
  if (isset($new_keys['primary key'])) {
    $this->addPrimaryKey($table, $new_keys['primary key']);
  }
  if (isset($new_keys['unique keys'])) {
    foreach ($new_keys['unique keys'] as $name => $fields) {
      $this->addUniqueKey($table, $name, $fields);
    }
  }
  if (isset($new_keys['indexes'])) {
    foreach ($new_keys['indexes'] as $name => $fields) {
      // Even though $new_keys is not a full schema it still has 'indexes' and
      // so is a partial schema. Technically addIndex() doesn't do anything
      // with it so passing an empty array would work as well.
      $this->addIndex($table, $name, $fields, $new_keys);
    }
  }
}