Apart from other fields, I have two dropdownfields in my Popup. I managed to get them populated with data. However, as there is a one-to-many relationship between them, I would like the second combo to be dynamically populated with the data specific to the first one. At the moment I get all the values in a second combo regardless of combo1. Is there a way to do it? And how can I find out if the state of the dropdownfield has been changed and how can I get the value?
I spent days on silverstripe doc, trying to find the answer but no luck.
Thank you in advance.