Function _ad_hoc_cache_key_from_args

lib/sqlalchemy/sql/cache_key.py:567–601

a quick cache key generator used by reflection.flexi_cache.

(
    tokens: Tuple[Any, ...],
    traverse_args: Iterable[Tuple[str, InternalTraversal]],
    args: Iterable[Any],
)

def _ad_hoc_cache_key_from_args(
    tokens: Tuple[Any, ...],
    traverse_args: Iterable[Tuple[str, InternalTraversal]],
    args: Iterable[Any],
) -> Tuple[Any, ...]:
    """a quick cache key generator used by reflection.flexi_cache."""
    bindparams: List[BindParameter[Any]] = []

    _anon_map = anon_map()

    tup = tokens

    for (attrname, sym), arg in zip(traverse_args, args):
        key = sym.name
        visit_key = key.replace("dp_", "visit_")

        if arg is None:
            tup += (attrname, None)
            continue

        meth = getattr(_cache_key_traversal_visitor, visit_key)
        if meth is CACHE_IN_PLACE:
            tup += (attrname, arg)
        elif meth in (
            CALL_GEN_CACHE_KEY,
            STATIC_CACHE_KEY,
            ANON_NAME,
            PROPAGATE_ATTRS,
        ):
            raise NotImplementedError(
                f"Haven't implemented symbol {meth} for ad-hoc key from args"
            )
        else:
            tup += meth(attrname, arg, None, _anon_map, bindparams)
    return tup


class _CacheKeyTraversal(HasTraversalDispatch):