_get_source_id_assigner() — langchain Function Reference

Architecture documentation for the _get_source_id_assigner() function in api.py from the langchain codebase.

Function python DataProcessing VectorStores called by 2

Entity Profile

DataProcessing→ VectorStores→ _get_source_id_assigner() — langchain Function Reference

Dependency Diagram

graph TD
  2a0916fb_362c_3fc6_1653_70983aeaa9dd["_get_source_id_assigner()"]
  0a83ef61_4c07_e8b4_648c_4199ec598979["api.py"]
  2a0916fb_362c_3fc6_1653_70983aeaa9dd -->|defined in| 0a83ef61_4c07_e8b4_648c_4199ec598979
  38094325_d9b6_a147_c56c_209933148cce["index()"]
  38094325_d9b6_a147_c56c_209933148cce -->|calls| 2a0916fb_362c_3fc6_1653_70983aeaa9dd
  4540ac2f_95e9_c32c_6eec_88589007c350["aindex()"]
  4540ac2f_95e9_c32c_6eec_88589007c350 -->|calls| 2a0916fb_362c_3fc6_1653_70983aeaa9dd
  style 2a0916fb_362c_3fc6_1653_70983aeaa9dd fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/langchain_core/indexing/api.py lines 116–130

def _get_source_id_assigner(
    source_id_key: str | Callable[[Document], str] | None,
) -> Callable[[Document], str | None]:
    """Get the source id from the document."""
    if source_id_key is None:
        return lambda _doc: None
    if isinstance(source_id_key, str):
        return lambda doc: doc.metadata[source_id_key]
    if callable(source_id_key):
        return source_id_key
    msg = (
        f"source_id_key should be either None, a string or a callable. "
        f"Got {source_id_key} of type {type(source_id_key)}."
    )
    raise ValueError(msg)