Nested objects have to be set as "embedded" even when they are all in src/main/groovy.

[douglasom]

Nested objects have to be set as "embedded" to be persisted even when they are all in src/main/groovy. I believe non entity classes should always be saved as embedded objects. Above all, non entity objects should never have to have static embedded declarations.

The following test only pass when the commented lines get uncommented. I believe it would be more appropriate if it passed even without those commented lines.

import grails.gorm.tests.GormDatastoreSpec
import grails.persistence.Entity

class EmbeddedWithinEmbeddedSimpleObjectSpec extends GormDatastoreSpec {

    void "Test embedded nested non-domain object"() {
        when:"An entity with a simple nested non-domain embedded object is persisted"
            def constellation = new Constellation(displayName: "foo", solarSystem: new SolarSystem(planet: new Planet(name: "earth")))
            constellation.save(flush:true)
            session.clear()
            constellation = Constellation.get(constellation.id)
        then:"The embedded association is persisted correctly"
            constellation.solarSystem?.planet?.name == 'earth'
    }

    @Override
    List getDomainClasses() {
        [Constellation]
    }
}

@Entity
class Constellation {

    String id
    String displayName

    SolarSystem solarSystem

    static embedded = [ 'solarSystem' ]
}

//@Entity
class SolarSystem {
    Planet planet

//    static embedded = [ 'planet' ]
}

//@Entity
class Planet {
    String name
}