The GORM Inheritance Problem

I am blocked by this GORM inheritance problem that I have, and I appreciate fresh eyes to take a look at this problem. (Im using Grails 1.3.2)

I have a base abstract class ...

abstract class MaintenanceSchedule {
    static belongsTo = [ maintenanceTask:MaintenanceTask ]
}

and I want to expand it so ...

class OneOffSchedule extends MaintenanceSchedule {

    Date scheduleDate

    static constraints = {
        scheduleDate(nullable:false)
    }

    private static OneOffSchedule getReferenceOneOffSchedule() {
        return new OneOffSchedule(scheduleDate:new Date())
    }
}

when I try to run the application, I get the following stack trace.

2010-06-26 12:01:43,090 [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.MappingException: An association from the table maintenance_task refers to an unmapped class: preventIT.maintenance.MaintenanceSchedule
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.MappingException: An association from the table maintenance_task refers to an unmapped class: preventIT.maintenance.MaintenanceSchedule
        at org.grails.tomcat.TomcatServer.start(TomcatServer.groovy:164)
        at grails.web.container.EmbeddableServer$start.call(Unknown Source)
        at _GrailsRun_groovy$_run_closure5_closure12.doCall(_GrailsRun_groovy:159)
        at _GrailsRun_groovy$_run_closure5_closure12.doCall(_GrailsRun_groovy)
        at _GrailsSettings_groovy$_run_closure10.doCall(_GrailsSettings_groovy:282)
        at _GrailsSettings_groovy$_run_closure10.call(_GrailsSettings_groovy)
        at _GrailsRun_groovy$_run_closure5.doCall(_GrailsRun_groovy:150)
        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.groovy: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.MappingException: An association from the table maintenance_task refers to an unmapped class: preventIT.maintenance.MaintenanceSchedule
        ... 23 more
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory': Invocation of init method failed; nested exception is org.hibernate.MappingException: An association from the table maintenance_task refers to an unmapped class: preventIT.maintenance.MaintenanceSchedule
        ... 23 more
Caused by: org.hibernate.MappingException: An association from the table maintenance_task refers to an unmapped class: preventIT.maintenance.MaintenanceSchedule
        ... 23 more
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2 answers

The problem may be a bug in gorm (perhaps hibernation, not sure where the root of the error lies) in the sense that it does not preserve abstract classes and breaks polymorphic relationships. Presumably you have

static hasMany = [schedules:MaintenanceSchedule]

MaintenanceTask. MaintenanceSchedule , , . - MaintenanceSchedule, .

MaintenanceSchedule, . , abstract, MaintenanceTask, .

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Source: https://habr.com/ru/post/1751839/


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