A [Parent] Collection to Rule Them All
I have recently set up collections populated based on custom field information, and I'm hoping to find a way to collapse them.
I have a custom field called "Department" and have 14 different entries right now, in addition to leaving the field blank to accommodate devices that are shared across any department as they are needed.
I'm looking for an efficient way to make a collection to aggregate all the devices that have the Department field filled in so I can use that as a parent collection. Given that there are a lot of different entries, an ideal solution would be to find any that do not have a blank Department field, but I'm not exactly sure how to represent nothingness in a collection's filters... or if I even can.
Any help/advice is appreciated. :)