I've been messing with FormFu, and am having a problem with the following config:

   <elements>
       name   title
       type   Text
     label  Post title
     <model_config>
        resultset Sets
        delete_if_empty 1
     </model_config>
   </elements>

   <elements>
       name   display
       type   Text
     label  Shortened Affiliate Link
     <model_config>
        resultset Affiliates
        delete_if_empty 1
     </model_config>
   </elements>
[download]

Each element needs to load/update from a different resultset model. To load the values into the form I am having to call default_values($result_set_row) for each table (in this case, twice). When I update, I do basically the same thing, but then I ran into the problem of having rows with empty values instead of the row being deleted. Now I could call a delete on the row, but FormFu has a model_config option called delete_if_empty. Setting this, it deletes everything I call an update on (in this case, 2 updates, one for each table) instead of just the table that is defined in the element tags under resultset. Do I have to check the values myself, and delete the rows if needed? Or is there some config i'm misunderstanding/not setting for FormFu that will make it 'Just Work'? :)