Sorting collection lists - display empty items at the end

Hi guys,

I’m a bit stuck. I have a collection list with several criteria to sort by. I have to sort every criteria by A-Z. The problem is the following: Items with empty values in the corresponding collection field are displayed at the beginning of the list. I have to move those items to the end without sorting the complete list by Z-A. Is there a workaround to achieve this without writing something such as “ZZZ” into the collection field? My first thought was to manipulate the sort order with JS during rendering the site.

Thanks a lot guys!


Example: mpa.wine