Xero: Retrieves a specific attachment for a specific purchase order by filename

← Accounting operations · Get started

Operation xero.getpurchaseorderattachmentbyfilename

Provider route: GET /api.xro/2.0/PurchaseOrders/{PurchaseOrderID}/Attachments/{FileName}. Alter supplies the connection’s credentials and routing.

Call through Alter

Install @alter-ai/sdk @alter-ai/xero with npm, or alter-sdk-xero with pip. Supply your connected customer’s grant ID and the arguments described below.

import { App } from "@alter-ai/sdk";
import { XeroIntegration } from "@alter-ai/xero";

async function execute(input: Parameters<XeroIntegration["accounting"]["getPurchaseOrderAttachmentByFileName"]>[0]) {
  const app = new App({ apiKey: process.env.ALTER_API_KEY! });
  try {
    const provider = new XeroIntegration(app, { grantId: process.env.PROVIDER_GRANT_ID! });
    const call = await provider.accounting.getPurchaseOrderAttachmentByFileName(input);
    const result = await call.wait();
    return result.bodyBytes();
  } finally {
    await app.close();
  }
}

import os
from alter_sdk import App
from alter_sdk_xero import XeroIntegration

async def execute(arguments):
    async with App(api_key=os.environ["ALTER_API_KEY"]) as app:
        provider = XeroIntegration(app, {"grant_id": os.environ["PROVIDER_GRANT_ID"]})
        call = await provider.accounting.get_purchase_order_attachment_by_file_name(arguments)
        result = await call.wait()
        return result.body_bytes()

Input

Field	Type	Presence	Description and constraints
$	object	Root	Additional keys: not allowed
path	object	Required within parent	Additional keys: not allowed
path.PurchaseOrderID	string	Required within parent	Format: uuid
path.FileName	string	Required within parent
headers	object	Required within parent	Additional keys: not allowed
headers.xero-tenant-id	string	Required within parent
headers.contentType	string	Required within parent

Response

Response media type: application/octet-stream. The table describes the pinned successful response. Referenced models link to their complete fields.

Field	Type	Presence	Description and constraints
$	string	Root	Format: binary

Policy, approvals and errors

SDK function policy ID: xero.getpurchaseorderattachmentbyfilename. Catalog operation: getPurchaseOrderAttachmentById. Rules can name either ID; function rules distinguish managed calls and conservatively cover raw calls sharing the route. Existing grant permissions and policy rules apply. wait() returns an immediate result or waits for a required approval; it never approves the request itself. Persist the approval ID to resume after a restart.

Provider errors retain their response; JSON decoding raises ProviderAPIError for provider failures. ManagedOperationError identifies contract/input/retention errors. See error handling and provider-specific behavior. Sensitive input may be refused before approval storage. A decoding error never resubmits a write.

Official provider source