# `PATCH /article/{sku}/supplier/{id}`

Protected. Requires a valid session cookie (`credentials: 'include'`).

Update article supplier assignment

Updates an existing article-supplier association (supplier SKU, packaging unit, stock, purchase price).


## Path parameters

| Param | Required | Type | Description |
|-------|----------|------|-------------|
| `sku` | yes | string | Article SKU |
| `id` | yes | integer | articlesupplier assignment ID |

## Body (JSON)

| Field | Required | Type | Description |
|-------|----------|------|-------------|
| `sku` | no | string |  |
| `pu` | no | number |  |
| `stock` | no | number |  |
| `sort` | no | integer | Display sort order |
| `netPrice` | no | number |  |
| `taxId` | no | integer |  |
| `taxRate` | no | number |  |

```json
{
  "sku": "MET-44910-B",
  "pu": 6,
  "stock": 95,
  "netPrice": 22.5
}
```

## Signals

On success, emits SSE signal: `article-<sku>` (see [`GET /events`](../events.md)).

## Response `200`

Updated supplier assignment

```json
{
  "supplier": {
    "id": 1,
    "articleId": 1,
    "entityId": 1,
    "supplierName": "…",
    "sku": "…",
    "pu": 1,
    "stock": 1,
    "sort": 1,
    "priceId": 1,
    "price": {
      "net": 1,
      "taxId": 1,
      "taxRate": 1
    }
  }
}
```

## Errors

| Status | Description |
|--------|-------------|
| 400 | Invalid pu, invalid stock, invalid price, invalid id, or no company selected — `{"error":"…"}` |
| 401 | Unauthorized — `{"error":"…"}` |
| 403 | Not authorized — `{"error":"…"}` |
| 404 | Supplier assignment, article, or company not found — `{"error":"…"}` |

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