Setting a decoder_new_doc fails

[MarkNijhof]

Hi,

I am using elixir-mongodb which relies on this lib, now by default this returns maps with atom keys, I however would like it to return maps with string keys. So I added the following configuration:

config :bson,
    decoder_new_doc: &Bson.Decoder.elist_to_map/1

In the console I can check that it is loaded correctly:

iex(3)> Application.get_env(:bson, :decoder_new_doc, &Bson.Decoder.elist_to_atom_map/1)
&Bson.Decoder.elist_to_map/1

But when I execute the following I still get atom keys:

iex(4)> [{"a", 1}, {"b", 2}] |> Bson.encode |> Bson.decode
%{a: 1, b: 2}

From looking at the code I should be doing what I am doing, but obviously I am doing something wrong.

[MarkNijhof]

Forgot, but this works from the console:

iex(6)> [{"a", 1}, {"b", 2}] |> Bson.encode |> Bson.decode(%Bson.Decoder{new_doc: &Bson.Decoder.elist_to_map/1})
%{"a" => 1, "b" => 2}