Search for fields with null values

Search for fields with null values

Hi all,

I'm writing a custom function in Desk. Part of this function must search for all tickets that are unassigned in a certain department. This is the part of the code:
  1. unassignedTicketSearchCriteria = Map();
  2. unassignedTicketSearchCriteria.put("assigneeId",null);
  3. unassignedTicketSearchCriteria.put("status","Open");
  4. unassignedTicketSearchCriteria.put("departmentId",departmentId);
  5. unassignedTicketResponse = zoho.desk.searchRecords(orgId,"tickets",unassignedTicketSearchCriteria,0,100,"new_desk");
This search is returning tickets where there is an agent assigned to and unassigned. This query is ignoring the search criteria "assigneeId". What I'm suspecting is that the code interpreter is ignoring the search criteria because it reads the query as being empty (null).
I tried sending it as a string "null", this gives a data type mismatch error. I tried converting the string to Long using toLong(), this gives me an error that the parameter can't be empty. Setting it as null (like in the code above) does nothing.

Has anyone been able to get this working? 

                            Zoho Desk Resources

                            • Desk Community Learning Series

                            • Digest

                            • Functions

                            • Meetups

                            • Kbase

                            • Resources

                            • Glossary

                            • Desk Marketplace

                            • MVP Corner

                            • Word of the Day

                                Zoho Marketing Automation

                                        Manage your brands on social media

                                                Zoho TeamInbox Resources

                                                  Zoho DataPrep Resources

                                                    Zoho CRM Plus Resources

                                                      Zoho Books Resources

                                                        Zoho Subscriptions Resources

                                                          Zoho Projects Resources

                                                            Zoho Sprints Resources

                                                              Qntrl Resources

                                                                Zoho Creator Resources

                                                                  Zoho WorkDrive Resources

                                                                    Zoho Campaigns Resources

                                                                      Zoho CRM Resources

                                                                      • CRM Community Learning Series

                                                                        CRM Community Learning Series

                                                                      • Tips


                                                                      • Functions


                                                                      • Meetups


                                                                      • Kbase


                                                                      • Resources


                                                                      • Digest


                                                                      • CRM Marketplace

                                                                        CRM Marketplace

                                                                      • MVP Corner

                                                                        MVP Corner



                                                                          Design. Discuss. Deliver.

                                                                          Create visually engaging stories with Zoho Show.

                                                                          Get Started Now