How to control detail records displayed after requery

Question

I have a master/detail form. I did not like the behavior of the screen clearing after I did a save so I added code to requery the master/detail records. There is still one behavior which I need to fix -- after I requery the master and detail records, I always get the first set of detail records, not the set of records displayed on the screen when I did the save. So if I have detail rows 40-50 displayed on the screen and do a save, the master/detail rows are requeried but I see rows 1-10 on the screen, not 40-50. Any ideas how to code around this?

Answer 1

This is due in part to the fact that detaching the detail object from its master and actually deleting the detail object are two different things. To work around this, add the following in your session bean, where Departments and Employees are your master/detail objects, respectively:
public void removeNestedEmployee(Employees entity) {
Departments owningDept = entity.getDepartment();
owningDept.removeDepartment(entity);
UnitOfWork uow = getSessionFactory().acquireUnitOfWork();
uow.deepMergeClone(owningDept);
Object empWorkingCopy = uow.readObject(entity);
uow.deleteObject(empWorkingCopy);
uow.commit();
Re-generate the data control for this session bean and then drag and drop this method onto your JSF page. The argument you'll pass in is the data provider for the selected employee:
${bindings.departmentCollectionIterator.currentRow.dataProvider}
This will both detach the record from the owning entity, delete the record, and force a refresh of both the master and detail iterators.
Hope this helps,
Lynn Munsinger
Oracle JDeveloper and ADF Product Management