Collection list within collection list

Hello,

I have two collection lists:

  • a collection of topics
  • a collection of sub-topics

I want to filter the sub-topics for the topics, but cannot seem to figure out how to do so. I am guessing variables but not sure how exactly.

Thanks

You can use filters on your sub-topics binding like this

You will have access to the context of your parent collection list, so you can filter subtopic based on the id of the parent topic.