This document discusses building REST APIs with Elixir and the Maru framework. It provides instructions on getting started with Maru, including adding it as a dependency and starting the Maru router. It then shows an example of building a REST API for users with Maru, including defining routes to get all users or a single user by ID, and filtering and sorting the results.

1. Elixir Maru REST API
@kohei_kimura

2. @kohei_kimura
Ɠ IDC
IoT
@kohei_kimura
kohei-kimura
kohei-kimura.github.io
♥ Visual Studio Code
-> ->

3. IDCF Cloud - One coin IaaS

4. Elixir
|>
|>
|> Ruby
|> mix

5. Today’s topic:

6. |> REST API
|> grape (Ruby)
|> Phoenix
|> HTTP
|>
|>

7. NOT do?
|>
|>
What does

8. Getting Started
# mix.exs
defp deps do
[ {:maru, "~> 0.11"} ]
end
def application do
[ applications: [:maru] ]
end
$ mix deps.get
$ iex -S mix

9. Dummily
|> Maru
|> JSON
|> kohei-kimura/dummily
case uri do
“/users” ->
“/users/1” -> ID 1
“/users?username=john” -> john
end

10. Dummily
defmodule Dummily do
defmodule Dummily.Router.Users do
use Maru.Router
namespace :users do
version "v1" do
params do
optional :username, type: String
optional :email, type: String
optional :posts, type: Integer
optional :sort, type: Atom, values: [:username, :id, :posts], default:
:id
end
get do
users = all_users() |> filter(params) |> sort_by(params[:sort])
conn |> put_status(200) |> json(users)
end
route_param :id, type: Integer do
get do
users = all_users() |> filter(params)
conn |> put_status(200) |> json(users)
end
end
end
end
end

11. |> Maru: REST API /DSL
|> / Phoenix
|>
|> REST API
|>
|> API GW

12. - Links
Awesome Elixir - github.com/h4cc/awesome-
elixir
|> Elixir, Erlang
Elixir School - elixirschool.com
|> Twitter Scala School
Elixir org - elixir-lang.org/docs
|>

13. Enjoy your Elixir programming!
Please follow me! ->