join needs a `localKey` (a field name or fn); ignoring the join.

Warnings reference › data-router:join-no-localkey

Identifier

data-router:join-no-localkey

Raised by

Data Router

Since

1.39.0

What happened

The join has a from but nothing to match on from the left side, so no row can be paired with a lookup row. The join is dropped and rows pass through unenriched.

The fix

Set localKey (or its alias on) to the field name on the incoming row, or a function that reads it.

The smallest fix

join: { from: 'customers', localKey: 'customerId' }

Reference

Covered in full at the API reference.