How do I use the "disable" function ?

Question

a!sideBySideItem(
 item: a!pickerFieldCustom(
 labelPosition: "COLLAPSED",
 placeholder: "Department",
 suggestFunction: rule!INO_departmentSearchSuggestFunction(
 nameList: if(
 rule!INO_isBlank(ri!selectedDepartmentList),
 ri!departmentList.departmentDescription,
 index(
 remove(
 ri!departmentList,
 wherecontains(
 ri!selectedDepartmentList,
 ri!departmentList
 )
 ),
 "departmentDescription",
 null
 )
 ),
 departmentList: if(
 rule!INO_isBlank(ri!selectedDepartmentList),
 ri!departmentList,
 remove(
 ri!departmentList,
 wherecontains(
 ri!selectedDepartmentList,
 ri!departmentList
 )
 )
 ),
 filter: _
 ),
 selectedLabels: index(
 ri!selectedDepartmentList,
 "departmentDescription",
 null
 ),
 value: ri!selectedDepartmentList,
 disabled: if(
 ri!byMonthOrWeek = cons!INO_REPORT_BY_SUMMARY,
 true,
 false
 ),
 saveInto: {
 ri!selectedDepartmentList,
 a!save(ri!selectedStaffList, null),
 a!save(ri!selectedSupervisorList, null),
 a!save(ri!selectedManagerList, null),
 a!save(ri!selectedSeniorManagerList, null),
 a!save(ri!selectedJobRoleList, null),
 a!save(ri!selectedStaffListReport, null),
 a!save(ri!selectedRegionList, null),
 a!save(ri!selectedRegionsSupportingList, null)
 }
 ),
 showWhen: and(
 not(
 a!isUserMemberOfGroup(loggedInUser(), cons!INO_GRP_STAFF)
 ),
 or(
 and(
 a!isUserMemberOfGroup(
 loggedInUser(),
 cons!INO_GRP_SUPERVISORS
 ),
 local!supervisorHasLD
 ),
 contains(
 {
 cons!INO_DESIG_ID_SENIOR_DIRECTOR,
 cons!INO_DESIG_ID_DIRECTOR,
 cons!INO_DESIG_ID_MANAGER,
 cons!INO_DESIG_ID_SENIOR_MANAGER
 },
 ri!employee.designationId
 )
 ),
 ri!togglePickers
 )
 ), 
 I use here "disable", but it is not working. Can you please tell me how is it working now?

Mike Schmitt · Answer

What are the values of these two items? You've shared a large snippet of code here but we have no way of knowing what these would evaluate to which would determine the status of your "disabled" parameter. 
 As Stefan said, does it work if you just set it to a value of "true"? If that works but your code doesn't, then you will need to troubleshoot your code.