[ADF BC] Showing a list of values based on the contents of another list

Question

I have tried to make a simplified example to illustrate what I want to do. Here is a picture of my example schema:
Example Schema Image
There are three entity tables: Employee, Department and Location.
There are also two intersection tabels: Employee_Location and Department_Location.
My ADF BC model layer is based on this schema.
What I am trying to do is have a creation process for an employee where you first fill in the employee details (forname and surname), then you assign the employee to a department, then - based on the locations assigned to the department - assign one or more locations to the employee.
Imagine that the employee is a door-to-door salesman and that each department in is company has several areas of a town that they cover (locations). Each employee will cover a subset of the locations that the department covers.
The first two steps are easy - the details page can be created using a form on the employee view and the department assignment can be done with a list of values drop down on the departments view.
The third step is a little more complex. You can use a shuttle to assign one or more locations to the employee, but you shouldn't just show a list of all locations, since some of these will not be covered by the department and therefore not be available to the employee. What I want is only the locations associated with the employee's department to appear in the list.
So my question is how do I model this using ADF Business Components?
Also, if an employee is allowed to be assigned to more than one department (adding another intersection table between the employee and department tables), how would I model that?

Answer 1

Hi,
For your reference variable name should be simply any name i.e resorts_resort.No need to put @ in front when declaring variable and to refer presentation variable you should use the below syntax
@{Variable_name}{Default_value} where default_value is some default value you want to give.
Now coming to your problem you can fulfill your requirement by simply checking constrain checkbox.If you choose all values instaed of SQL results constrain checkbox will appear.Approach followed by you should also work but constrain is an easy option.
Thanks
Sandeep
Edited by: Sandeep Saini on 10-Sep-2010 00:59
Edited by: Sandeep Saini on 10-Sep-2010 00:59