Get Purchase Orders Meta

Operates on Purchase Orders. In the Zuper client app this module is labeled "Purchase Order" for most companies, and "Material Order" for companies in the roofing industry — the API and data shape are identical either way. Purchase Orders and Work Orders (Service Orders) share the exact same underlying schema and endpoints; they're distinguished only by the purchase_order_type field (PURCHASE_ORDER here) and the /purchase_orders vs /service_orders route prefix. Returns the column/field configuration used to render this module's list view — display labels, sort/lock/edit capability, and redirect targets per field. Field display names are dynamically relabeled to "Material Order" for roofing-industry companies.