How to retrieve collections in use (that have products)

[richgcook]

When retrieving a list of collections only (to create a filter list) is it possible to only return those with products? It returns them all even when blank but there doesn't seem to be an attribute where it shows a product count to then ignore?

client.collection.fetchQuery({first: 100, sortKey: 'TITLE'}).then(function(collections) {

I could then loop through collection.products on each and get the length that way but seems a little long winded and I'm guessing extra processing?

[rebeccajfriedman]

At this time, you cannot filter by product presence. I'm curious what your use case is for having collections with no products in them.