Dropdown creation problem in ADF

Question

Hi,
I just wanted to create a drop down in ADF ,which will be based on a read only VO,so i tried out af:selectoneChoice ,but it seems it needs a base VO and destination VO,can't we just create a simple dropdown based on one VO.
Thanks

Answer 1

Hi,
"Thanks very much for the reply,but one thing what i cant understand is why we can't create a drop down from a single VO in adf,why we have to create duplicate VO,when we can do that in OAFramework.And ADF is supposed to be better than OAF."
The reason is simple: The VO you update has a setting to the current row so the update is added to the correct row. The list though is queried and needs to show more values than just the current row. The usecase in which the target VO is the same as the list VO is quite unusual. For example: You have a VO listing all the Countries and then there is one that holds the Departments which need to be in a country. So the list VO is the CountryVO whereas the DepartmentsVO is the base VO.
If you use the same VO for the listbox and as a traget there also is no guarantee that only a single occurence of a country is shown unless specified in the VO query, in which case the VO no longer behaves as it should when trying to update it.
If you need an understanding why Applications has chosen ADF over OA framework, then I suggest to ask this question on their forum
Frank