Trying to delete a record from an entity-based VO in ADF

Question

We are using J-Developer 9.0.5.2
This is a web app using struts and ADF BC
Click the link below to view part of the struts diagram that relates to this question
http://home.earthlink.net/~katie1les/images/delete.gif
1. We have a DataPage that displays a list of items (catalogItemLIsting.jsp). This is a view of all items in a particular category based on the ItemsVO. Each item has a delete icon beside it.
2. The user clicks the delete icon which forwards to the bindDeleteItem DataAction that will bind that item number (through custom method in the AM) to an entity-based DeleteItemVO (the only record that will be in the DeleteItemVO is the item they selected to delete). This step corresponds to the deleteItem Data Page as seen in the image link above).
We do this step (step 2) because we want to show the user a confirmation page with additional item information before they actually delete the item. Otherwise, we could just perform the delete from the original page.
3. On the deleteItem data page there is a Delete (">Select</a>) link beside the single item in the view that when clicked should set the current row (the only row in the view object) and forward to the setDeleteItemDA Data Action.
4. I dragged the setCurrentRowWithKey method from the DeleteItemVO onto the setDeleteItemDA data action.
5. I forwarded that data action to the deleteItemDA data action where I dragged the Delete method from the DeleteItemVO.
6. This action forwards to a deleteItemDP data page where I dropped a Commit action from the AM which owns the DeleteItemVO.
The result of executing these steps brings it back to itself (deleteItem.do) and tries to rebind the single record view object producing a ORA-01008: not all variables bound error and not forwarding to the setDeleteItemDA data action.
Are we using the right approach here?
I tried following the example located at: http://otn.oracle.com/products/jdev/collateral/tutorials/9050/bizcomp_jsp_tut.html#delete, but there are some differences between the two. We are using data pages and a single view object, while the example is using regular jsp pages and a master detail view relationship.

Answer 1

Thanks Steve for the reply. We dowloaded the following example (http://otn.oracle.com/products/jdev/tips/muench/DeleteEmpWithConfirm.zip) and tried to make it work for us. We set everything exactly the same (as far as we could tell). There is one difference though between what you have in this example and ours and that is that the VO that is dropped on the first data page is first bound by a custom method through a preceeding data action. When the page is rendered we see the item we choose (and that was bound in the data action) correctly on the page.
The problem comes in when we click on the delete link on that page, it does not seem to be posting back properly - it appears to be ignoring the "confirmDelete" event, which is part of the url (and it's corresponding forward named the same) and instead ends up trying to rebind the VO on the same page which produces a "not all variables bound" error. Error listed below.
Why is the Datapage seeking to rebind the VO again, when it was already bound previously? Shouldn't the setCurrentRowKey method simply set the current row on the VO without having to requery the VO again?
*** error page ***
You must correct the following error(s) before proceeding:
JBO-29000: Unexpected exception caught: oracle.jbo.SQLStmtException, msg=JBO-27122: SQL error during statement preparation. Statement: SELECT DeleteItemInfoEntityObject.RETAILER_NUMBER, DeleteItemInfoEntityObject.AUTH_ITEM_CODE, DeleteItemInfoEntityObject.UPC, DeleteItemInfoEntityObject.ITEM_DESCRIPTION, DeleteItemInfoEntityObject.PACK, DeleteItemInfoEntityObject.RETAIL_SIZE, DeleteItemInfoEntityObject.UNIT_COST, DeleteItemInfoEntityObject.AWI_DEPT_NAME, DeleteItemInfoEntityObject.RETAILER_CATALOG_NAME, DeleteItemInfoEntityObject.RETAILER_CATEGORY_NAME, DeleteItemInfoEntityObject.RETAIL_PRICE, DeleteItemInfoEntityObject.QUANTITY_AT FROM DELETEITEMINFOVIEW DeleteItemInfoEntityObject WHERE AUTH_ITEM_CODE = :1 AND RETAILER_NUMBER = :2
JBO-27122: SQL error during statement preparation. Statement: SELECT DeleteItemInfoEntityObject.RETAILER_NUMBER, DeleteItemInfoEntityObject.AUTH_ITEM_CODE, DeleteItemInfoEntityObject.UPC, DeleteItemInfoEntityObject.ITEM_DESCRIPTION, DeleteItemInfoEntityObject.PACK, DeleteItemInfoEntityObject.RETAIL_SIZE, DeleteItemInfoEntityObject.UNIT_COST, DeleteItemInfoEntityObject.AWI_DEPT_NAME, DeleteItemInfoEntityObject.RETAILER_CATALOG_NAME, DeleteItemInfoEntityObject.RETAILER_CATEGORY_NAME, DeleteItemInfoEntityObject.RETAIL_PRICE, DeleteItemInfoEntityObject.QUANTITY_AT FROM DELETEITEMINFOVIEW DeleteItemInfoEntityObject WHERE AUTH_ITEM_CODE = :1 AND RETAILER_NUMBER = :2
ORA-01008: not all variables bound
*** error ***
Les, here's a minimal working sample:
http://otn.oracle.com/products/jdev/tips/muench/Delete
mpWithConfirm.zip
It uses just two data pages and leverages the
built-in event-handling features of ADF described in
the ADF Data Binding Primer and ADF/Struts Overview.
The pages use the post-back pattern to handle their
own events before forwarding.
http://otn.oracle.com/products/jdev/collateral/papers/
0g/ADFBindingPrimer/index.html