how to get field previous value in a UI action (server side)

[ggg]

I have a UI Action executing on server.

I need the PREVIOUS value of a field because I need to know if the value has changed.

(I do NOT want to use a BR, I want the UI Action).

Is there a way to do this?

[dave_edgar]

i'm pretty sure you can only get the previous value when running a client script.

If you really need an additional field and with it you'd need an update business rule to capture the previous value. 

Then a UI Action can compare the values

Hope that helps, if so please mark as correct or helpful

Dave

[ggg]

how do i access the previous value in the ui action?

[dave_edgar]

you'd have to set another field with the previous value using and onChange client script or a business rule.  The your UI action can compare the two fields 

[ggg]

what is the statement in the ui action?

you cannot use previous.

nor

previous.getValue('xxx')

there is no previous in a ui action