Hello! I am having issue getting Lookup columns to show up as a data source on my table.
Here, the Session table has a lookup column called “What to bring (from Class)”. However, in Glide any lookup column does not show as a possible data source.
Sources are derived from rows. Whether that is directly using a table, using a glide relation, or using an airtable linked record. What you are trying to use is essentially an array. Arrays may be derived from rows of data (not always), but they are fundamentally different from rows, so they can not be a data source for a collect. Glide lookups and Airtable lookups are not really rows of data. They are just arrays of of values.
Long story short, you can’t do what you are trying to do. Use a glide relation or airtable linked record as your data source.