Entity with key cannot be owned by another row

Question

Hi All,
I have a master detail relationship between 2 VOs using Entity level association. When I try to create details rows using createAndInitRow(), I am getting below error. The Association has composition association, cascade delete, cascade update key attributes selected
Entity with key:oracle.jbo.Key[ XXXXXXX ] cannot be owned by another row:oracle.jbo.Key[ XXXXXXX ]
Code -
RowSetIterator rsi = (RowSetIterator)((ParentVORowImpl)parentCurrentRow).getChildVO();
NameValuePairs nvp = null;
Row row = null;
for (ExpressionObject obj : objectList) {
nvp = new NameValuePairs();
nvp.setAttribute("AAA", "AAA");
nvp.setAttribute(<Attributes>, <Attribute Values>);
row = rsi.createAndInitRow(nvp);
rsi.insertRow(row);
The moment createAndInitRow is called for first item I get the error and other items does not get associated with parent properly.
Any clue what wrong am I doing??

Answer 1

Copying from [http://www.packtpub.com/oracle-application-development-framework-real-world-developers-guide/book|Oracle ADF Real World Developers Guide]
Creating child rows in composition association
Creating a new child row is a bit tricky when the master-child entity association
type is composition. When you mark an association between master and child entity
objects as composition, the framework takes the necessary steps to ensure that the
child entity object row does not exist without the master entity row. If you try to
create a new child row by calling createRow() on the view object, the framework
will throw the oracle.jbo.InvalidOwnerException: JBO-25030: Failed to
find or invalidate owning entity exception.
There are two possible ways to create child entity rows in this case:
• Find the master row by using findByKey() or calling executeQuery() with
a proper condition and then get the RowIterator for the child collection
by accessing the view link accessor attribute. Now you can use the child
RowIterator to call createRow() for creating the child row. The following
code snippet illustrates the creation of the child entity row for the
Country-Location composition association:
//In application module implementation class
* This custom method defined in application module
* creates child location rows for a master
* country entity through accessor iterator
public void createChildRowsThruIter() {
//Find the parent view object
ViewObject countries = findViewObject("Countries");
//IN is the Key value for a specific Country row
Key key = new Key(new Object[] { "IN" });
//Find the country for 'IN', maxNumOfRows=1
Row rows[] = countries.findByKey(key, 1);
//Access the RowIterator for Location
RowIterator locIter = (RowIterator)rows[0].
getAttribute("LocationVO");
//Create and init location row
Row row = locIter.createRow();
row.setAttribute("LocationId", 2200);
row.setAttribute("City", "Bangalore");
locIter.insertRow(row);
• Alternatively, you can directly create a new row in the child view object,
using createAndInitRow() by passing an appropriately constructed instance
of oracle.jbo.NameValuePairs, which includes the foreign key attribute
that provides the context for a child row. Here is an example:
//In application module implementation class
* This custom method defined in application module
* creates child location rows for a master
* country entity using createAndInitRow()
public void createChildRowsThruNameValuePairs() {
ViewObject locations = findViewObject("Locations");
//Initialize Attributes and Values
String[] attributes = new String[] { "CountryId" };
Object[] values = new Object[] { "IN" };
//Pass the foreign key value for Country while
//initializing new location row
Row locRow = locations.createAndInitRow(new
NameValuePairs(attributes, values));
//Set other attributes
locRow.setAttribute("LocationId", 2200);
locRow.setAttribute("City", "Bangalore");
locations.insertRow(locRow);
}