Question

For now I have field “String firstName” it converted to “first_name” and i want “firstname” as default in Hibernate. Is it posible?

Answer 1

You can change the naming strategy for the entire project. From the documentation https://grails.github.io/grails-doc/latest/guide/GORM.html#customNamingStrategy.

By default Grails uses Hibernate’s
ImprovedNamingStrategy to convert
domain class Class and field names to
SQL table and column names by
converting from camel-cased Strings to
ones that use underscores as word
separators. You can customize these on
a per-instance basis in the mapping
closure but if there’s a consistent
pattern you can specify a different
NamingStrategy class to use.

Configure the class name to be used in grails-app/conf/DataSource.groovy in the hibernate section, e.g.

So, something like this in your DataSource.groovy

dataSource {
    pooled = true
    dbCreate = "create-drop"
     …
}
hibernate {
    cache.use_second_level_cache = true
     …
    naming_strategy = org.hibernate.cfg.DefaultNamingStrategy
}