[jboss-user] [EJB 3.0] - Re: Cannot remove entites used in relationships

[bathulap]

Problem :  
              Relation between ManualCheck & ManualCheckDistribution is one to many, ManualCheckDistribution to ManualCheckDistributionDetail is one to many.

            When I tried to invoke  delete Child), hibernate is throwing below exception. Though we are trying to delete entity, error message talks about persisting an entity. 

              javax.persistence.EntityNotFoundException: deleted entity passed to persist: [com.adp.payroll.model.payroll.manualcheck.ManualCheckDistribution#]

             Guess hibernate will invoke persist of Parent entity after removing child entity to synchronize its state with database. 

             Parent entity Set/Collection of child entities has still a reference  to  Child entity which was deleted, because we have not refreshed Set/Collection of child entities in Parent entity. 

             When Hibernate calls persist on Parent to synchronize we get the above exception.

Soution :  Before you invoke delete(Child), remove the child entity refernce from the  Set/Collection of child entities in Parent entity
           Code snippet:
           	public void deleteManualCheckDistribution(PayrollAgreementId payrollAgreementId, String payNumber, int distNumber )throws PayrollServiceException {
		ManualCheckDistribution checkDist = getManualCheckDistribution(payrollAgreementId, payNumber, distNumber);
		ManualCheck mc = checkDist.getManualCheck();
		Set distList = mc.getManualCheckDistributions();
		distList.remove(checkDist);
		getEm().remove(checkDist);
	}

Thanks,
Bathula.            


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