DCL condition is not working as per drop down for Resource object

Summary:

We have created Resource DCL field in custom object.

We need to see in DCL drop down Email address of the Resource not Name of the Resource

Content (required):

DCL condition

def var_ObjView2 = newView('Resource')

def view_criteria2 = newViewCriteria(var_ObjView2)

def row_searchValue2 = view_criteria2.createRow()

def criteria2 = row_searchValue2.ensureCriteriaItem('EmailAddress')

criteria2.setOperator('IsNot')

criteria2.setValue(null)

view_criteria2.insertRow(row_searchValue2)

var_ObjView2.appendViewCriteria(view_criteria2)

var_ObjView2.executeQuery()

while(var_ObjView2.hasNext())

{

def row2 = var_ObjView2.next()

def resourceEmail = row2.getAttribute('EmailAddress')

return resourceEmail

}

But this is not returning anything from field

Version (include the version you are using, if applicable):