{"record":{"id":"ba29fa5fd58db655","repo":"openai/openai-python","slug":"no-next-page-expected-please-check-has-next-pag","errorCode":null,"errorMessage":"No next page expected; please check `.has_next_page()` before calling `.get_next_page()`.","messagePattern":"No next page expected; please check `\\.has_next_page\\(\\)` before calling `\\.get_next_page\\(\\)`\\.","errorType":"exception","errorClass":"RuntimeError","httpStatus":null,"severity":"error","filePath":"src/openai/_base_client.py","lineNumber":291,"sourceCode":"    # by pydantic.\n    def __iter__(self) -> Iterator[_T]:  # type: ignore\n        for page in self.iter_pages():\n            for item in page._get_page_items():\n                yield item\n\n    def iter_pages(self: SyncPageT) -> Iterator[SyncPageT]:\n        page = self\n        while True:\n            yield page\n            if page.has_next_page():\n                page = page.get_next_page()\n            else:\n                return\n\n    def get_next_page(self: SyncPageT) -> SyncPageT:\n        info = self.next_page_info()\n        if not info:\n            raise RuntimeError(\n                \"No next page expected; please check `.has_next_page()` before calling `.get_next_page()`.\"\n            )\n\n        options = self._info_to_options(info)\n        return self._client._request_api_list(self._model, page=self.__class__, options=options)\n\n\nclass AsyncPaginator(Generic[_T, AsyncPageT]):\n    def __init__(\n        self,\n        client: AsyncAPIClient,\n        options: FinalRequestOptions,\n        page_cls: Type[AsyncPageT],\n        model: Type[_T],\n    ) -> None:\n        self._model = model\n        self._client = client\n        self._options = options","sourceCodeStart":273,"sourceCodeEnd":309,"githubUrl":"https://github.com/openai/openai-python/blob/9917c6e28e66e90e1227b3d223c06a8c5441515a/src/openai/_base_client.py#L273-L309","documentation":"The OpenAI Python SDK raises this ValueError when client.vector_stores.file_batches.list_files() (sync) is called with a falsy vector_store_id. It is a pre-request guard ensuring the /vector_stores/{vector_store_id}/file_batches/{batch_id}/files path receives a valid non-empty store identifier.","triggerScenarios":"Calling list_files(vector_store_id='', batch_id='vsfb_...') or with vector_store_id=None on the synchronous resource, typically because the store ID variable was never populated.","commonSituations":"IDs sourced from environment variables or databases that are empty, iterating over a list of stores where one entry is blank, or copy-pasting example code without replacing placeholder IDs.","solutions":["Populate vector_store_id with the actual 'vs_...' identifier (from client.vector_stores.create().id or a retrieved store).","Validate the source of the ID (env var, config, DB row) and fail early if it is empty.","Guard loops: skip or log entries with missing store IDs before calling list_files."],"exampleFix":"# before\nfiles = client.vector_stores.file_batches.list_files(vector_store_id=store, batch_id=bid)  # store == ''\n\n# after\nif not store:\n    raise ValueError(f\"missing vector_store_id for batch {bid}\")\nfiles = client.vector_stores.file_batches.list_files(vector_store_id=store, batch_id=bid)","handlingStrategy":"validation","validationCode":"assert vector_store_id and vector_store_id.startswith(\"vs_\"), f\"bad vector_store_id: {vector_store_id!r}\"\nfiles = client.vector_stores.file_batches.list_files(vector_store_id=vector_store_id, batch_id=batch_id)","typeGuard":"def is_valid_vector_store_id(v: object) -> bool:\n    return isinstance(v, str) and v.startswith(\"vs_\") and len(v) > 3","tryCatchPattern":null,"preventionTips":["Validate IDs read from env/config/DB at startup, not at call time.","Skip and log records with blank IDs when batch-processing."],"tags":["openai","vector-stores","file-batches","pagination","validation","python"],"backgroundTag":"empty-required-parameter","analyzedSha":"9917c6e28e66e90e1227b3d223c06a8c5441515a","analyzedAt":"2026-08-28T11:46:34.183Z","schemaVersion":2},"datasetVersion":"2026-08-28T16:17:29.566Z"}