Is there any way to determine which field has been modified before the entity submits in web module?

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#1

Is there any way to determine which field has been modified before the entity submits in web module?
Whether the original value can be obtained when an entity property is changed？

#2

Hi,
All this information is available on the middleware in the EntityChangedEvent listener:
https://doc.cuba-platform.com/manual-7.0/entityChangedEvent.html

If you need to have this information on the UI before the entity is committed - then I guess, you would need to write your own code in the screen controller. Attach a listener to the entity which is being edited, listen for PropertyChangeEvent-s and record changed attributes and previous attribute values.

see com.haulmont.chile.core.model.Instance#addPropertyChangeListener