compareGroups: the "by" column has fewer than two distinct values to group by.

Warnings reference › compareGroups:groups

Identifier

compareGroups:groups

Raised by

The grid (core)

Since

1.27.0

What happened

With no explicit groups, the two most frequent values of the by column are compared - and it has fewer than two distinct values in the current row set. There is nothing to compare, so the call returns null.

The fix

Check the filters: the two groups have to be present in the rows the grid is currently showing. Name the two values explicitly in groups if the automatic choice is not what you want.

Reference

Covered in full at the API reference.