join needs a `from` (the lookup source id); ignoring the join.

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

Identifier

data-router:join-no-from

Raised by

Data Router

Since

1.39.0

What happened

A join spec named no lookup source, so the router cannot know what to enrich from. The join is dropped and the route degrades to plain fan-in: rows arrive unenriched rather than the router throwing.

The fix

Set from to the id of the source holding the lookup rows.

The smallest fix

router.attach(grid, { join: { from: 'customers', localKey: 'customerId', fields: ['name'] } });

Reference

Covered in full at the API reference.