groovy - Grails 1.0.3 Upgrade Problems

Question

I am trying to upgrade a Grails 1.0.3 project to 1.3.7 and am having what I believe are related issues.

The old project has Hibernate xml files in conf/hibernate/Domain1.hbm.xml I am guessing that GORM didn't exist in 1.0.3?

Do I need to essentially convert what is in the xml files into Groovy code in the Domain classes in domain/

Any other details are helpful. Thanks.

UPDATE -

All of these changes are the result of a org.hibernate.DuplicateMappingException It looks like I can just move the domain files: Relevant Post Is that really what I want to do though? My understanding is that with GORM I wouldn't need to use the xml files at all.

Here is an exception

2011-05-29 16:43:49,616 [main] ERROR context.GrailsContextLoader  - Error executing bootstraps: Error creating bean with name 'messageSource': Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'transactionManager': Cannot resolve reference to bean 'sessionFactory' while setting bean property 'sessionFactory'; nested exception is 

    org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory': Invocation of init method failed; nested exception is org.hibernate.DuplicateMappingException: Duplicate class/entity mapping sportsdb.Event
    org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'messageSource': Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'transactionManager': Cannot resolve reference to bean 'sessionFactory' while setting bean property 'sessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory': Invocation of init method failed; nested exception is org.hibernate.DuplicateMappingException: Duplicate class/entity mapping sportsdb.Event
        at org.grails.tomcat.InlineExplodedTomcatServer.doStart(InlineExplodedTomcatServer.groovy:112)
        at org.grails.tomcat.InlineExplodedTomcatServer$doStart.callCurrent(Unknown Source)
        at org.grails.tomcat.TomcatServer.start(TomcatServer.groovy:97)
        at grails.web.container.EmbeddableServer$start.call(Unknown Source)
        at _GrailsRun_groovy$_run_closure5_closure12.doCall(_GrailsRun_groovy:158)
        at _GrailsRun_groovy$_run_closure5_closure12.doCall(_GrailsRun_groovy)
        at _GrailsSettings_groovy$_run_closure10.doCall(_GrailsSettings_groovy:280)
        at _GrailsSettings_groovy$_run_closure10.call(_GrailsSettings_groovy)
        at _GrailsRun_groovy$_run_closure5.doCall(_GrailsRun_groovy:149)
        at _GrailsRun_groovy$_run_closure5.call(_GrailsRun_groovy)
        at _GrailsRun_groovy.runInline(_GrailsRun_groovy:116)
        at _GrailsRun_groovy.this$4$runInline(_GrailsRun_groovy)
        at _GrailsRun_groovy$_run_closure1.doCall(_GrailsRun_groovy:59)
        at RunApp$_run_closure1.doCall(RunApp:33)
        at gant.Gant$_dispatch_closure5.doCall(Gant.groovy:381)
        at gant.Gant$_dispatch_closure7.doCall(Gant.groovy:415)
        at gant.Gant$_dispatch_closure7.doCall(Gant.groovy)
        at gant.Gant.withBuildListeners(Gant.groovy:427)
        at gant.Gant.this$2$withBuildListeners(Gant.groovy)
        at gant.Gant$this$2$withBuildListeners.callCurrent(Unknown Source)
        at gant.Gant.dispatch(Gant.groovy:415)
        at gant.Gant.this$2$dispatch(Gant.groovy)
        at gant.Gant.invokeMethod(Gant.groovy)
        at gant.Gant.executeTargets(Gant.groovy:590)
        at gant.Gant.executeTargets(Gant.groovy:589)
    Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'transactionManager': Cannot resolve reference to bean 'sessionFactory' while setting bean property 'sessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory': Invocation of init method failed; nested exception is org.hibernate.DuplicateMappingException: Duplicate class/entity mapping sportsdb.Event
        ... 25 more
    Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory': Invocation of init method failed; nested exception is org.hibernate.DuplicateMappingException: Duplicate class/entity mapping sportsdb.Event
        ... 25 more
    Caused by: org.hibernate.DuplicateMappingException: Duplicate class/entity mapping sportsdb.Event
        ... 25 more

Answer 1

GORM certainly existed in Grails 1.0.3.

You'll probably just have to update your hibernate configuration for 1.3.7. Take a look at the Grails and Hibernate - Reference Documentation

Unless you are mapping to a legacy or otherwise unusual database schema the standard GORM domain modelling is the way to go. It's very flexible.