What is the best way to create a screen that is not linked to a datasource or to a backend physical screen?
In other terms, I need to create an “run billing input” screen that captures parameters from the user and then generates invoices accordingly. The actual parameters are not linked to a datasource or table.
I have tried to create a UI without creating an entity, and built the xml file manually.
However, I am getting the following error:
GuiDevelopmentException: Datasource is not defined for FieldGroup field ‘fromDate’. Only custom fields can have no datasource.
Please advise on the best approach to achieve this.