dmstocking
To and from camelCase json api keys to snake_case elixir convention
I have an existing camelCase JSON API that I can’t change and I want to be able to continue to use elixir snake_case naming conventions. I am getting the JSON via UDP connection, and I send JSON responses back to that UDP endpoint. I am currently using Jason directly. It was included in the template, so I went with it. I figured out that I could provide my own decode function for keys so that I can change the JSON key to snake_case and run String.to_existing_atom/1. However this doesn’t appear to be an option in the encoding. I did find Convert camel case to underscore in json but it mostly talks about how to convert from camelCase to snake_case. It doesn’t talk about integrating into the JSON encoding. I could just recursively rebuild the entire struct into a map changing the keys, but that sounds like it would kill performance. Is there something I am missing? Should I just recursively convert each JSON payload I am sending? Should I switch to Poison? Should I not care about snake_case convention in Elixir?
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axelson
You might enjoy checking out recase:
Here’s a quick script to show how you could use it
Mix.install([:recase, :jason])
Recase.Enumerable.convert_keys(
%{"yourKey" => "value"},
&Recase.to_snake/1
)
|> IO.inspect(label: "res")
json =
Recase.Enumerable.convert_keys(
%{my_key: "value"},
&Recase.to_camel/1
)
|> IO.inspect(label: "to camel")
|> Jason.encode!()
IO.puts("Json: #{json}")
Running this prints out:
res: %{"your_key" => "value"}
to camel: %{myKey: "value"}
Json: {"myKey":"value"}
kevinschweikert
@mhanberg just released a new blog post and mentions his library schematic. Maybe that could help.
Here’s the Blog Post: Credo Language Server and the birth of elixir-tools | Mitchell Hanberg
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