Pass dicts instead of StockItem/Warehouse ORM objects to the purchase
order form template so Jinja's tojson filter can serialize them for
the embedded script. Fixes TypeError when creating or editing a PO.
- new_purchase_order and edit_purchase_order now convert query results
to minimal dicts (id, sku, name, unit for items; id, code, name for
warehouses) before render_template.
- Add docs/implementation-notes/INVENTORY_PO_FORM_JSON.md describing
the requirement and pattern for other forms embedding data in JS.
Dries Peeters
dbd4a69f4b