Follow-up of this thread : https://www.cuba-platform.com/discuss/t/how-to-generate-standard-bean-validators-for-custom-field.
We developped a workaround, but having such a feature natively in CUBA would be a great addition in my eyes.
For instance when you display a price, you always display a currency. In read-only mode this is the combination of a text field for price and a label for the currency. In edit mode, this is the combination of two text fields for price and currency, each one bound to an entity property.