In Survey123 Connect I am using the Search Appearance to populate a choice list from an existing feature layer. The feature layer has a date field and I want to filter the choice list to show only records for which the date field is empty. As a reminder, this is the syntax for the search appearance:
search(‘tableName’, ‘searchType’, ‘searchColumn’, ‘searchText’, ‘filterColumn’, ‘filterText’)
With searchColumn or filterColumn set to my date field, I have tried setting searchText and filterText to '', NULL, ISNULL, ISBLANK, NaN and none of those seem to work. Anyone know what syntax I should use to filter to only show choices that have an empty date field? My other search/filter parameters work just fine.