Dashboard: Alarm source, assigned_to with an empty/null value?

[Rikard Thorin]

Is it possible when using Alarm as data source on a image-widget, to have the "assigned_to" parameter with an empty/null value? 

Thing is that we want to generate an alarm when it's NOT assigned to anyone. 

[Marco Ippati]

Hi Rith,

 

Try, Assign to > DOES NOT MATCH > .*

[Rikard Thorin]

YES!! Thanks!!
How did you know that? Is there documentation on this? 

[Marco Ippati]

the condition 'matches' equals (or NOT) a regular expression. 

The regex: /.*/ matches any character.  So if the field is empty the match doesn't occur, hence the alarm is NOT selected.

[Rikard Thorin]

Of course! I didn't even think of regex here.
thank you!