Method __init__

lib/sqlalchemy/sql/lambdas.py:198–218

(
        self,
        fn: _LambdaType,
        role: Type[SQLRole],
        opts: Union[Type[LambdaOptions], LambdaOptions] = LambdaOptions,
        apply_propagate_attrs: Optional[ClauseElement] = None,
    )

        )

    def __init__(
        self,
        fn: _LambdaType,
        role: Type[SQLRole],
        opts: Union[Type[LambdaOptions], LambdaOptions] = LambdaOptions,
        apply_propagate_attrs: Optional[ClauseElement] = None,
    ):
        self.fn = fn
        self.role = role
        self.tracker_key = (fn.__code__,)
        self.opts = opts

        if apply_propagate_attrs is None and (role is roles.StatementRole):
            apply_propagate_attrs = self

        rec = self._retrieve_tracker_rec(fn, apply_propagate_attrs, opts)

        if apply_propagate_attrs is not None:
            propagate_attrs = rec.propagate_attrs
            if propagate_attrs:
                apply_propagate_attrs._propagate_attrs = propagate_attrs

    def _retrieve_tracker_rec(self, fn, apply_propagate_attrs, opts):
        lambda_cache = opts.lambda_cache