Oracle JHeadstart Developer's Guide - Downloads - Oracle

Generating Primary Key Values. Alternatively, you can create an intersection
table with a composite primary key consisting of the two foreign key columns.
2. Go to the Application Module and add another (top-level) usage of the
EmployeesView. Call the usage “EmployeesShuttle”.
3. Create a new Dynamic Domain in the Application Definition Editor. Call it
EmployeesShuttle and set its Data Collection to EmployeesShuttle. The Value
Attribute should be EmployeeId and the Meaning Attribute LastName
4. Make the following changes to the Hirable detail group of the Departments base
group. The Layout Style of Hirable should be intersection-shuttle. Check the
checkbox Same Page?. Set the Domain for Unselected List in Shuttle to
“EmployeesShuttle”. Set the Tabname to “Unassigned”. Set Display Title
(plural) to “Assign Hirable Employees” and Display Title (singular) to
“Assigned”.
5. When you now run the JAG, you will get the following error:
JAG-00126 [ Departments / Hirable2 ] View Object Usage EmployeesShuttle
should have a nested View Object Usage based on HirableView.
The reason you get this error is this: at runtime, JHeadstart needs to know which
foreign key attribute(s) in the HirableView map to the primary key attribute(s) of
EmployeesView. This information is required to correctly insert a row in the
HIRABLE intersection table. JHeadstart uses the ViewLink on which the nested
HirableView usage is based to lookup this attribute mapping. So, open te
Application Module Editor, and add the HirableView as a nested ViewObject
usage under the EmployeesShuttle usage:
6. Generate again. The error should have gone now. Run the application and your
page will look like this:
5 - 42 Generating Page Layouts JHeadstart Developer’s Guide