Hiding field based on picked group in group picker

Question

In a "Create Issue" screen I am trying to hide a custom field based on a value of a group picker field. The field should be hidden for all groups apart from a particular group.

I am using the Scriptrunner Behavior plugin.

// Group ID is the group picker field
FormField fieldFF = getFieldByName("Group ID");
String fieldValue = fieldFF.getValue();
if(!"Some Special Group".equals(fieldValue)){
 FormField fieldToHideFF = getFieldByName("Initial Severity");
 fieldToHideFF.setHidden(true);
}

However when adding both fields to the behavior this does not work. I am setting the group picker field via a http GET parameter.

Thanks in advance!

Edit: Added problem statement

Alexey Matveev · Answer

Could you add logging to your script and have a look in the logs?

FormField fieldFF = getFieldByName("Group ID");
log.error("fieldFF: " + fieldFF)
String fieldValue = fieldFF.getValue();
log.error("fieldFF value: " + fieldValue)
if(!"Some Special Group".equals(fieldValue)){
log.error("in condition")
FormField fieldToHideFF = getFieldByName("Initial Severity");
log.error("fieldToHideFF: " + fieldToHideFF)
fieldToHideFF.setHidden(true);
}

Christian Körner · Answer

I know. I merely use the http call to fill the value of a group picker field. Based on the filled in value I need to hide or show a certain other field.

Alexey Matveev · Answer

Behaviours do not work with http calls