Adding the unique validation on child vo attribute

Question

Hi, I'm using Jdev 11.1.2.0 I have two tables, master child relationship. In master EO1, I have column Master_Id and in child EO2, I have columns Master_Id, child_id, child_name. i have created the assosiations in beteween EO1 and EO2 with the column Master_Id. and creatd vo's and viewlinks also. and when i drag and drop the master vo and child vo on to the page, if i select master vo first row, the correspodning child records are displayed perfectly. Now I want to apply the unique validation on the child vo columns  child_id and child_name. like Child vo data;
Master_Id 
Child_Id 
Child_name
1
1
A
1
2
B
1
3
C
2
1
A
2
2
B
2
3
C
if I select 1 in master table, then in child table if i create a row and inserting the data, it should check for the duplicate data is there or not under that master_id. I did adding the Custom attribute validation on EO level, like checking the value is existed in the given rowset or not. Instead of adding this custom attibute validation, is there any other way to do it on the EO attribtue level, like  selecting the generate unique key constraint. Any suggestion would be appreciated. Thanks.

Answer 1

In this car you only can validate using have methods or groovy.  Read http://docs.oracle.com/middleware/1212/adf/ADFFD/bcrules.htm#CIHBBDDB for more info about this.
However, if you have the relationship you should have the pk fk too.
Timo