Source code for cattr.preconf.bson

"""Preconfigured converters for bson."""
from datetime import datetime
from typing import Any

from .._compat import Set, is_mapping
from ..converters import GenConverter
from . import validate_datetime


[docs]def configure_converter(converter: GenConverter): """ Configure the converter for use with the bson library. * sets are serialized as lists * non-string mapping keys are coerced into strings when unstructuring """ def gen_unstructure_mapping(cl: Any, unstructure_to=None): key_handler = str args = getattr(cl, "__args__", None) if args and issubclass(args[0], str): key_handler = None return converter.gen_unstructure_mapping( cl, unstructure_to=unstructure_to, key_handler=key_handler ) converter._unstructure_func.register_func_list( [(is_mapping, gen_unstructure_mapping, True)] ) converter.register_structure_hook(datetime, validate_datetime)
[docs]def make_converter(*args, **kwargs) -> GenConverter: kwargs["unstruct_collection_overrides"] = { **kwargs.get("unstruct_collection_overrides", {}), Set: list, } res = GenConverter(*args, **kwargs) configure_converter(res) return res