How can I get the display value from oldValue in a client script?

[gjz1]

I have a requirement to store the old display value of a reference field in a string field.  I'm using an onChange client script, but I can't figure out how to get the display value from oldValue.  Does anyone know how I can accomplish this?  What I have written returns the sys_id, I need the display value.

TIA

[Nisar Khan1]

have you tried oldValue.getDisplayValue() ?

[gjz1]

getDisplayValue() isn't available on a client script.

[Willem]

As the great Ashutosh replied here:

https://community.servicenow.com/community?id=community_question&sys_id=13ff8f101b1dd05017d162c4bd4b...

1) Why you want to do this using script. Just add the field in activity log same as state field using funnel icon. Which will show you value transition from old to new.

2) You have to write a script include and pass the oldValue sys_id there to get name.

[Nisar Khan1]

Yup, Script Include is the only way.