Update a PO line
Procurement module
PATCH/po-lines/{id}poLines.update
A purchase order line. Updates the fields sent; omitted fields are unchanged. Requires `If-Match` with the current `ETag`: a stale tag returns 412 and a missing tag returns 428.
- Requires the capability procurement.po.write.
- OAuth scopes: procurement.
- Send If-Match with the ETag you read. A stale tag returns 412; a missing tag returns 428.
- Error statuses: 400, 401, 404, 412, 422, 428, 429. Errors are RFC 9457 problem details.
Path and query parameters
| Field | Type | Required | Description |
|---|---|---|---|
| id | string (uuid) | Yes | Identifier of the po line. |
Request body: PoLineUpdate
| Field | Type | Required | Description |
|---|---|---|---|
| budget_line_id | string (uuid) | null | No | Identifier of the budget line. |
| element_id | ItemId | No | Catalog item identifier `{URID}-{ORG}-{SEQ}` (Section 3.6).Constraints: pattern ^[0-9]000\.[0-9]{2}\.[0-9]{2}-[A-Z0-9]+-[0-9]+$ |
| description | string | No | Line description.Constraints: length 1 to 300 |
| quantity | number | No | Quantity ordered. |
| unit_basis | UnitCode | null | No | |
| unit_price_minor | integer (int64) | null | No | Unit price. Integer minor units of the resource currency; null means unpriced, never zero. |
| line_number | integer | No | Order of the line within the purchase order.Constraints: range 1 to any |
{
"budget_line_id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f",
"description": "Stage deck rental",
"quantity": 24,
"unit_price_minor": 4500,
"line_number": 1
}Response 200: PoLine
| Field | Type | Required | Description |
|---|---|---|---|
| id | string (uuid) | Yes | Identifier of the po line. |
| org_id | string (uuid) | Yes | Identifier of the owning organization, derived from the parent row and never accepted from the caller. |
| created_at | string (date-time) | Yes | When the row was created. |
| created_by | string (uuid) | null | Yes | Identifier of the person who created the row; null when a seed, platform or system process created it. |
| updated_at | string (date-time) | Yes | When the row was last updated. |
| updated_by | string (uuid) | null | Yes | Identifier of the person who last updated the row; null when a seed, platform or system process updated it. |
| purchase_order_id | string (uuid) | Yes | Identifier of the purchase order. |
| budget_line_id | string (uuid) | null | Yes | Identifier of the budget line. |
| element_id | ItemId | Yes | Catalog item identifier `{URID}-{ORG}-{SEQ}` (Section 3.6).Constraints: pattern ^[0-9]000\.[0-9]{2}\.[0-9]{2}-[A-Z0-9]+-[0-9]+$ |
| description | string | Yes | Line description.Constraints: length 1 to 300 |
| quantity | number | Yes | Quantity ordered. |
| unit_basis | UnitCode | null | Yes | |
| unit_price_minor | integer (int64) | null | Yes | Unit price. Integer minor units of the resource currency; null means unpriced, never zero. |
| line_number | integer | Yes | Order of the line within the purchase order.Constraints: range 1 to any |
{
"id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f",
"org_id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f",
"created_at": "2026-10-08T14:30:00Z",
"created_by": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f",
"updated_at": "2026-10-08T14:30:00Z",
"updated_by": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f",
"purchase_order_id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f",
"budget_line_id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f",
"element_id": "4000.01.01-XPMS-001",
"description": "Stage deck rental",
"quantity": 24,
"unit_basis": "each",
"unit_price_minor": 4500,
"line_number": 1
}Code samples
curl -X PATCH "$XOS_BASE_URL/po-lines/0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f" \
-H "Authorization: Bearer $XOS_API_KEY" \
-H 'If-Match: W/"etag-from-your-last-read"' \
-H "Content-Type: application/json" \
-d '{"budget_line_id":"0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f","description":"Stage deck rental","quantity":24,"unit_price_minor":4500,"line_number":1}'const { data, etag } = await xos.poLines.update("0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f", {
"budget_line_id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f",
"description": "Stage deck rental",
"quantity": 24,
"unit_price_minor": 4500,
"line_number": 1
}, { ifMatch: etag });response = xos.po_lines.update("0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f", {"budget_line_id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f", "description": "Stage deck rental", "quantity": 24, "unit_price_minor": 4500, "line_number": 1}, if_match=etag)xos po-lines update 0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f --data '{"budget_line_id":"0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f","description":"Stage deck rental","quantity":24,"unit_price_minor":4500,"line_number":1}' --if-match auto