hariharasudhan94
Key not found - Map?
I am new to elixir devlopement , my map is looks like follow
map = %{"name" => "test"}
But when i trying to access map.name I am getting error like
(KeyError) key :name not found in: %{"name" => "test"}
why i can’t get map value whose key is string
Marked As Solved
aseigo
The map.keyname mechanism only works when atoms are used as keys. When using strings you can use Map.get:
iex(3)> Map.get(map, "name")
"test"
or the syntax:
iex(4)> map["name"]
"test"
So you could instead use atoms for keys:
iex(5)> map = %{:name => "test"}
%{name: "test"}
iex(6)> map.name
"test"
More info here in the docs, of course: Map — Elixir v1.20.2
hth…
Also Liked
Qqwy
Please do note that when you work with user input, you should always work with a map with string keys, and not atom keys, because if you auto-convert user input to atoms, you will open up your system to a Denial of Service attack because atoms are not garbage collected. Always use String.to_existing_atom (over String.to_atom) when you convert user input into atoms.
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