The return value of the vector_stores.file_batches.poll method contains the ID of the VectorStore.

Confirm this is an issue with the Python library and not an underlying OpenAI API

• This is an issue with the Python library

Describe the bug

The expected result is that the file_batches object ID should be stored and returned.

To Reproduce

Run the sample code.
call poll method.

Code snippets

import openai

file_obj = None
vector_store_obj = None

try:
    client = openai.OpenAI(
        api_key=os.environ['OPENAI_API_KEY']
    )
    file_obj = client.files.create(file=('test_data.json', b'{"aa": "AA"}\n'), purpose='user_data')
    vector_store_obj = client.vector_stores.create(name='test_vector_store')

    batch_obj = client.vector_stores.file_batches.create(
        vector_store_id=vector_store_obj.id,
        file_ids=[file_obj.id]
    )
    print(f'type:[{type(batch_obj)}]')
    print(batch_obj.model_dump_json(indent=2))

    response = client.vector_stores.file_batches.poll(batch_id=batch_obj.id, vector_store_id=vector_store_obj.id)
    print(f'type:[{type(response)}]')
    print(response.model_dump_json(indent=2))

    print("# The return value contains the vector_store id.")
    print("# Shouldn't the return value of the file_batches.poll method be the batch_obj ID?")
    print(f'# OpenAI version:[{openai.__version__}]')

finally:
    if file_obj:
        client.files.delete(file_id=file_obj.id)
    if vector_store_obj:
        client.vector_stores.delete(vector_store_id=vector_store_obj.id)

# Below are the execution results.
'''
type:[<class 'openai.types.vector_stores.vector_store_file_batch.VectorStoreFileBatch'>]
{
  "id": "vsfb_ibj_6905db4e33dc81f4a789ad8df2b5c748",
  "created_at": 1761991502,
  "file_counts": {
    "cancelled": 0,
    "completed": 0,
    "failed": 0,
    "in_progress": 1,
    "total": 1
  },
  "object": "vector_store.file_batch",
  "status": "in_progress",
  "vector_store_id": "vs_6905db4d53708191a75c5ef9979258fd"
}
type:[<class 'openai.types.vector_stores.vector_store_file_batch.VectorStoreFileBatch'>]
{
  "id": "vs_6905db4d53708191a75c5ef9979258fd",
  "created_at": 1761991501,
  "file_counts": {
    "cancelled": 0,
    "completed": 1,
    "failed": 0,
    "in_progress": 0,
    "total": 1
  },
  "object": "vector_store",
  "status": "completed",
  "vector_store_id": null,
  "name": "test_vector_store",
  "description": null,
  "usage_bytes": 0,
  "expires_after": null,
  "expires_at": null,
  "last_active_at": 1761991501,
  "metadata": {}
}
# The return value contains the vector_store id.
# Shouldn't the return value of the file_batches.poll method be the batch_obj ID?
# OpenAI version:[1.109.1]
'''

OS

Ubuntu24.04

Python version

Python3.12.3

Library version

openai v1.109.1

Start at the vector_stores.file_batches.poll method and reproduce the behavior with the sample code in this issue. Compare the returned VectorStoreFileBatch object's id and object fields with batch_obj; done means the poll result consistently represents the file batch and returns its expected ID, with a regression test covering the behavior.