Create index also in production mode

[Clan-Utility]

The current code

if(sails.config.models.migrate !== 'alter' && sails.config.models.migrate !== 'drop') {
      sails.log.verbose('sails mongoat skipping index creation (according to "' + sails.config.models.migrate + '" migration strategy)');
      return cb();
}

skips creating index when sails.config.models.migrate === 'safe'. So what should we do in order to create index in production mode? db-migrate?

Btw, in mongodb doc, it says

If you call multiple createIndex() methods with the same index specification at the same time, only the first operation will succeed, all other operations will have no effect.

Does this mean we can safely call collection.createIndex even in production mode?