Grails: Creating classes that you do not want to store on the DB

Question

In grails is creating a new domain class and never persisting any objects to the db, the best way to create a class that you don't want to store in the db?

Answer 1

Grails provide the src directory to develop some utility classes and other artifacts. The src directory it not persisted.

src - Supporting sources
    groovy - Other Groovy sources
    java - Other Java sources

Answer 2

define static mapWith="none" inside your class in grails-app/domain folder