Programming Elixir 1.2

Transformation: Convert Response

We’ll need a JSON library to convert the response into a data structure. Searching hex.pm, I found the poison library^[23] (no relation to HTTPoison), so let’s add its dependency to our mix.exs file.

project/2/issues/mix.exs

defp deps do
  [
    httpoison: "~> 0.8",
    poison:    "~> 1.5"
  ]
end

Run mix deps.get, and you’ll end up with poison installed.

To convert the body from a string, we call the Poison.Parser.parse! function when we return the message from the GitHub API:

project/3/issues/lib/issues/github_issues.ex

def handle_response({:ok, %{status_code: 200, body: body}}) do
  { :ok, Poison.Parser.parse!(body) }
end

def handle_response({_, %{status_code: _, body: body}}) ...