Naming strategy

When mapping your entities to database tables and columns, their names will be defined by naming strategy. There are 2 basic naming strategies you can choose from:

• UnderscoreNamingStrategy - default of MySqlDriver and SqliteDriver
• MongoNamingStrategy - default of MongoDriver

You can override this when initializing ORM. You can also provide your own naming strategy, just implement NamingStrategy interface and provide your implementation when bootstrapping ORM:

class YourCustomNamingStrategy implements NamingStrategy {
  ...
}

const orm = await MikroORM.init({
  ...
  namingStrategy: YourCustomNamingStrategy,
  ...
});

Naming strategy in mongo driver

MongoNamingStrategy will simply use all field names as they are defined. Collection names will be translated into lower-cased dashed form:

MyCoolEntity will be translated into my-cool-entity collection name.

Naming strategy in SQL drivers

MySqlDriver defaults to UnderscoreNamingStrategy, which means your all your database tables and columns will be lower-cased and words divided by underscored:

CREATE TABLE `author` (
  `id` int(11) unsigned NOT NULL AUTO_INCREMENT,
  `created_at` datetime(3) DEFAULT NULL,
  `updated_at` datetime(3) DEFAULT NULL,
  `terms_accepted` tinyint(1) DEFAULT NULL,
  `name` varchar(255) DEFAULT NULL,
  `email` varchar(255) DEFAULT NULL,
  `born` datetime DEFAULT NULL,
  `favourite_book_id` int(11) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;