Filter Condition Changes from null or empty

[jack_zheng]

HI All

I need help creating a filter condition on the field Assigned To when it changes from empty (null).   Is there a way to do this?

I'm using this filter in a business rule to create metric instances on who is doing incident assignments when the assigned is empty changing to a technician.

Thank you

[dvp]

Try this

current.assigned_to.changesFrom('')

[jack_zheng · Accepted solution]

How do I input that into the filter condition field in business rules?

[jack_zheng]

interestingly just by leaving the field blank like the image above solves my issue.

[pelleitaby]

If you are in need of the opposite, you can also write the code like this.

!current.assigned_to.changesFrom('')