a structural append/delete needs a single-field rowKey so the optimistic row can be rekeyed to the server id; with a composite or function rowKey the temp key cannot be written back onto the row. Set rowKey to one field name to use add-row / delete-row.

Warnings reference › grid.structural.compositekey

Identifier

grid.structural.compositekey

Raised by

The grid (core)

Since

1.26.0

What happened

Adding a row optimistically means giving it a temporary key and then rewriting that key to the id the server assigns. That rewrite needs to know which field holds the key, and a composite or function rowKey does not say. The row is still added with its temporary key; it simply cannot be rekeyed when the server answers.

The fix

Set rowKey to a single field name for grids that add or delete rows.

The smallest fix

createGrid(el, { rowKey: 'id', edit: { addRow: true } });

Reference

Covered in full at the API reference.