[jboss-user] [Beginners Corner] - Using the persistence manager in an entity bean

[nes]

Greetings!

I have an entity bean called person which has a 1:n relationship to another entity bean called job, which contains all jobs that this person has ever had.

now, i'd like to have a function in person, which gives me only one of these jobs, namely the one he's currently working for.

i did it already, and it nearly works, it looks like this:

	Job s;
	@Transient
	public Stelle getCurrentJob() {
		if(s==null){
	EntityManager em = (EntityManager) Component.getInstance("entityManager");
			Long sid = (Long) em.createQuery("fanceql").setParameter("id", this.id).getSingleResult();
			s = em.find(Job.class,sid);
		}
		return s;
	}

The problem is, that changes to Job are not saved to the database. why aren't they?

is this bad design? how would you do it?

niko

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