I have a page list and in Flow Action, on Validate tab, I check this list.
Validation rule checks if any of list items have property .Approved != false. If it's false - show error message. Pega shows messages for each failed validation (if in my list 4 failed items, it shows me 4 same messages). Also, I can't set flag "Continue validation" to false, because it's disabled.
Validation schema(simplified): Flow Action -> Validate -> IsAllItemsApproved (for each Item in ItemsList call IsItemApproved) -> IsItemApproved (.Approved != false).
So, question is: how to show single error message if any of validation fails?
In IsAllItemsApproved validation, use the expression builder and check for the function IsinPageList and give required values. If the page list contains false, trigger an error message. And set this error message to pagelist property.