benonymus
Can't access key in params even though it is in there in log
Hey I have this params arriving to my definition and I am calling it recording_params:
%{
"challenge_id" => "2",
"path_to_recording" => %Plug.Upload{
content_type: "audio/mp4",
filename: "2_a_Mister X.mp4",
path: "/tmp/plug-1537/multipart-1537727280-384028641338291-1"
},
"user_id" => "5"
}
then I am trying to use it like this:
recordings =
get_recording_list_by_user_id_and_challenge_id(
recording_params.user_id,
recording_params.challenge_id
)
on this line recording_params.user_id I am getting an erro that says:
(KeyError) key :user_id not found in: %{"challenge_id" => "2", "path_to_recording" => %Plug.Upload{content_t
ype: "audio/mp4", filename: "2_a_Mister X.mp4", path: "/tmp/plug-1537/multipart-1537727280-384028641338291-1"}, "us
er_id" => "5"}
why is that? and how can i fix it?
Marked As Solved
t0t0
The key user_id is not an atom but a string, so you can’t use the notation recording_params.user_id.
Use Map.fetch!(recording_params, "user_id") or recording_params["user_id"].
Also Liked
archdragon
recording_params.user_id works only if the keys are atoms.
You can make your code work, by using recording_params["user_id"]
Your code should look like this:
recordings =
get_recording_list_by_user_id_and_challenge_id(
recording_params["user_id"],
recording_params["challenge_id"]
)
You can find more about this behaviour here: https://hexdocs.pm/elixir/Map.html (around paragraph nr 6 
)
fertapric
Dot-based syntax is only supported for atom keys. More info at https://hexdocs.pm/elixir/Access.html#module-dot-based-syntax
benonymus
thanks all 
benonymus
Oh, thanks guys 
Popular in Questions
Other popular topics
Latest on Elixir Forum
Sponsor Spotlight
Practical resources that improve the lives of professional developers. By developers, for developers.
Categories:
Sub Categories:
Forums
Our Sponsors
Build Elixir applications with speed and confidence.
Supporting innovation across the BEAM ecosystem.
We build reliable cloud platforms for business-critical systems.
Catch errors, track performance, monitor hosts and more.
Practical resources that improve the lives of professional developers.
Enabling companies to succeed by building software people love.
The deployment platform built for Elixir: PaaS ease, VPS control.
Courses that'll move you from confusion to "Aha, now I get it!"