The simplest solution that I found is using Poison.
struct = %{
callback_query: nil,
channel_post: nil,
chosen_inline_result: nil,
edited_message: nil,
inline_query: nil,
message: %Nadia.Model.Message{
audio: nil,
caption: nil,
channel_chat_created: nil,
chat: %Nadia.Model.Chat{
first_name: "Christian",
id: 543211234,
last_name: "Tovar",
photo: nil,
title: nil,
type: "private",
username: "ChristianTovar"
},
contact: nil,
date: 1562605521,
delete_chat_photo: nil,
document: nil,
edit_date: nil,
entities: nil,
forward_date: nil,
forward_from: nil,
forward_from_chat: nil,
from: %Nadia.Model.User{
first_name: "Christian",
id: 543211234,
last_name: "Tovar",
username: "ChristianTovar"
},
group_chat_created: nil,
left_chat_member: nil,
location: nil,
message_id: 714,
migrate_from_chat_id: nil,
migrate_to_chat_id: nil,
new_chat_member: nil,
new_chat_photo: [],
new_chat_title: nil,
photo: [],
pinned_message: nil,
reply_to_message: nil,
sticker: nil,
supergroup_chat_created: nil,
text: "google meets",
venue: nil,
video: nil,
voice: nil
},
update_id: 412827321
}
{:ok, json_string} = struct |> Poison.encode
{:ok, map} = json_string |> Poison.decode
map
