(Quick Reference)

Database Mapping Usage

Domain classes in Grails by default dictate the way they are mapped to the database using sensible defaults. You can customize these with the ORM Mapping DSL. For example create a Book domain:

grails create-domain-class Book

And then you can use the mapping block to customize the ORM mapping behavior.

class Book {
    String title
    Date releaseDate
    Author author

static mapping = { table "books" author column:"auth_id" } }

Refer to the user guide section on ORM Mapping for more information.

Global Database Mapping

You can configure mapping globally in grails-app/conf/Config.groovy as follows:

grails.gorm.default.mapping = {
   cache true
   id generator:'sequence'
   'user-type'( type:org.hibernate.type.YesNoType, class:Boolean )
}