Sort() Error: 'We do not know how to compare this data'

In a doc I’m working on, two relation columns (both relations to the same underlying table) are intended to be combined into a third column. The third column should display the rows from the original two columns, sorted by a particular column in the underlying table.

I have it working fine when both columns to combine contain data, but it isn’t working when one of those columns is empty.

I’ve prepared a minimal example of the issue in this doc. When the ‘Combine A and B’ button is pressed, the Result column is intended to be populated with the contents of Column A combined with the contents of Column B, sorted according to the ‘Sort by This’ value.

Any help getting this working would be appreciated!

Hi @thefifth_reddit, please provide edit access to the doc so people can take a look and make suggestions.

Thanks for the suggestion- I’ve switched the demo doc so it’s now editable by anyone

Hi, I’ve made some changes to the doc, do they get you the result you are after?