Can someone please help me understand how to configure hibernate to do what i want.
I have a parent entity "Appartment" with a List of "Room"s as children. I have a form to edit "Appartment"s and within that form i have listed all of the children "Room"s just for informative purposes. Rooms are added and edited in a separate form.
So because i am listing the rooms in the appartment-form i have set lazyloading to false:
@OneToMany
@JoinColumn (name = "appartmentId")
@LazyCollection (LazyCollectionOption.FALSE)
private List<Room> room;
But if I edit an appartment and store it, all the appartments rooms suddenly dissappear. In the database they are not deleted, but dereferenced (as in appartmentId = null).
So how can I configure hibernate to only persist my Appartment-object. And not touch the children at all?
This is my save-action:
public String save() throws Exception {
boolean isNew = (appartment.getAppartmentId() == null);
appartment = appartmentManager.save(appartment);
String key = (isNew) ? "appartment.added" : "appartment.updated";
saveMessage(getText(key));
return SUCCESS;
}
This is really simple. No need to repopulate your children, or create separate DTO's.
If you are never going to persist the children just add insertable=false, updatable=false to your joincolumn annotation. Like this:
@OneToMany
@JoinColumn (name = "appartmentId", insertable = false, updatable = false)
@Fetch(value = FetchMode.JOIN)
private List<Room> room;
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With