Orbeon forms - customize section repetitions by expression

Question

I have a text filed X. If X field is empty I want to set section Y repetitions to 1. If X field is not empty I want to set section Y repetitions from 0 to 1. I tried to customize it in section repetitions like this:

Link to form: https://demo.orbeon.com/demo/fr/orbeon/builder/edit/485d30b47d4f7a5f7dde7674b4d53eeb5a390436

Expected behaviour:

• if field X is not empty, section Y is optional (0 or 1 repetition); user can remove section

• if field X is empty, section Y is required (1 repetition); user can't remove section

• if section Y has 0 repetition and we remove value from field X then create one section Y repetition

Is it possible to do that in Orbeon?

Answer 1

Currently, the min/max setting for repeated content for repeated grids or repeated sections impacts the user's ability to add/remove rows/sections, but not the validity of the form should the number of rows/sections be below the minimum or above the maximum. This is covered by RFE #4567.

While what you suggest might be possible in the future, I think it is better, for usability, to handle this in a more explicit way:

1. Have a checkbox (e.g. "Provide additional information"), which is only shown if the text field isn't empty.
2. Create a non-repeated section, and set it to be visible if the field is empty or the checkbox is checked.