How can I apply a Reference Qualifier only when a field is valued a certain way?

[Shane J]

My Change Manager would like the 'Parent' field on Change Request (Task table reference) to be limited to Incident and Problem records only when the Type == Emergency, otherwise the entire Task table can be used.   I've got a reference qualifier:

sys_class_name=incident^ORsys_class_name=problem^EQ

But how do I apply it only in that case?

[Chuck Tomasi · Accepted solution]

Look at using an advanced reference qualifier (a script of your choosing.) Pass the function your type, it can then return the proper filter string (either the above or nothing.)

javascript:myConditionCheck().changeType(current.type);

var myConditionCheck = Class.create();

myConditionCheck.prototype = {

      initialize: function() {

      },

    changeType : function(changeType) {

            if (changeType == 'Emergency')

                  return 'sys_class_name=incident^ORsys_class_name=problem^EQ';

            return '';

    },

      type: 'myConditionCheck'

};

http://wiki.servicenow.com/index.php?title=Reference_Qualifiers

[Abhinay Erra]

Hi chuck,

      Just a minor correction to the code, the function parameter and the variable you are using inside if are not same.

[Chuck Tomasi]

Thanks. Updated.

[Shane J]

Well I'm missing something but I'm not sure what:

What'd I screw up?