Get all records in multi selected master child tables

Question

Hi,
I am using JDeveloper 11.1.1.4 version and using ADF-BC in my project.
I have a simple master child[one to many] relationship in my project.
In my view page,I display this master child [Ex: EmpVo1--->DeptVo2] as tables.
I have multi-slection enabled for master table.
My requirement is that,on multi selecting the rows in master tables,I want to get all the child records in my backing bean.
that is if a master row has 3 child records and another master row has 4 child records and on multiple selection of these two records in master table,I should get all the child records in my backing bean.
I need this to implement cascade delete functionality.
Following is sample piece of code
1) called on selecting the rows in master table
public void onRSCGrpSelect(SelectionEvent selectionEvent) {
// Add event code here...
ADFUtil.invokeEL("#{bindings.RscGroupVO1.collectionModel.makeCurrent}",
new Class[] { SelectionEvent.class },
new Object[] { selectionEvent });
RowKeySet rowKeySet = (RowKeySet)tblRSCGrp.getSelectedRowKeys();
CollectionModel cm = (CollectionModel)tblRSCGrp.getValue();
for (Object facesTreeRowKey : rowKeySet) {
cm.setRowKey(facesTreeRowKey);
JUCtrlHierNodeBinding rowData =
(JUCtrlHierNodeBinding)cm.getRowData();
Row row = rowData.getRow();
System.out.println("\n" +
row.getAttribute(0) + " :: " + row.getAttribute(1) +
" :: " + row.getAttribute(2));
System.out.println("Displaying Child Records");
displayChildRecords(row.getAttribute(0));
2. private void displayChildRecords(Object rscGrp) {
ViewObject rscMapVo = getRscMapViewObj();
RowSetIterator rsI = rscMapVo.createRowSetIterator(null);
while (rsI.hasNext()) {
Row row = rsI.next();
System.out.println("\n" +
row.getAttribute(0) + " :: " + row.getAttribute(1) +
" :: " + row.getAttribute(2));
rsI.closeRowSetIterator();
But the problem is that ,it is always giving me the last selected rows child record details
Please suggest the error I am doing.
Thanks,
Praveen

Answer 1

Your problem is that you use makecurrent, which should not be used on a multi select table. Next if you have master detail relationship you should have a view link between them. In this case you can expose a method in you master to get the related child row. No need to get the VO itself as you can use the child iterator accessors to get the child record.
public void onRSCGrpSelect(SelectionEvent selectionEvent) {
// Add event code here...
RowKeySet rowKeySet = (RowKeySet)tblRSCGrp.getSelectedRowKeys();
CollectionModel cm = (CollectionModel)tblRSCGrp.getValue();
for (Object facesTreeRowKey : rowKeySet) {
cm.setRowKey(facesTreeRowKey);
JUCtrlHierNodeBinding rowData =
(JUCtrlHierNodeBinding)cm.getRowData();
Row row = rowData.getRow();
//cast to the right row class
EmpEmpVoRow empRow = (EmpEmpVoRow) row;
// now you cann access the child row iterator
RowSetIterator it = empRow.getDepVO();
//now you cna iterate over the child rows
System.out.println("\n" +
row.getAttribute(0) + " :: " + row.getAttribute(1) +
" :: " + row.getAttribute(2));
System.out.println("Displaying Child Records");
//use hte child rows here
}Not sure if the code compiles out of the box (doing this on the train :-)
Timo