Grails Domain Class Invalid String Search

I am trying to find records in my database using my service and this works:

def resultList = IndividualRecord.findAllWhere(citizenship: 'us')

      

        
        
        
      

    

but when i change citizenship to uppercase like so:

def resultList = IndividualRecord.findAllWhere(citizenship: 'us')

      

        
        
        
      

    

it doesn't work anymore. So I tried this:

def resultList = IndividualRecord.findAllWhere(citizenship.caseIgnoreEquals('us'))

      

        
        
        
      

    

but that won't work. Any suggestions? Citizenship is a property of a String

class IndividualRecord

.