Example output from a JSONAPI generator

create.sh

mix jsonapi.gen.templates
mix phoenix.gen.json Test testing name:string email:string

test_controller.ex

defmodule Testing.Testing.TestController do
  use Testing.Web, :controller
  alias Testing.ChangesetView
  import Ecto.Query

  plug :scrub_params, "data" when action in [:create, :update]

  # GET /tests/:id
  def show(conn, %{"id" => id}) do
    test = Repo.get!(Testing.Test, id)
    render conn, "show.json", data: test
  end

  # GET /tests
  def index(conn, params) do
    filter = conn.assigns[:jsonapi][:filter]
    tests = from(t in Testing.Test)
    |> JSONAPI.Query.add_query_paging(conn.assigns[:jsonapi])
    |> Repo.all

    render conn, "index.json", data: tests, params: params
  end

  # POST /tests
  def create(conn, json=%{"format" => "json"}) do
    changeset = Test.changeset(%Test{}, Dict.get(json, "data", %{}))
    case Repo.insert(changeset) do
      {:ok, test} ->
        conn
        |> put_resp_header("location", test_path(Endpoint, :show, test.id))
        |> put_status(201)
        |> render "show.json", data: test
      {:error, errors} ->
        put_status(conn, 400)
        |> render ChangesetView, "error.json", changeset: changeset
    end
  end

  # PUT /tests/:id
  def update(conn, json=%{"format" => "json", "id" => id}) do
    test = Repo.get!(Test, id)
    changeset = Test.changeset(test, Dict.get(json, "data", %{}))
    case Repo.update(changeset) do
      {:ok, test} ->
        render conn, "show.json", data: test
      {:error, changeset} ->
        put_status(conn, 400)
        |> render ChangesetView, "error.json", changeset: changeset
    end
  end

  # DELETE /tests/:id
  def delete(conn, %{"format" => "json", "id" => id}) do
    test = Repo.get!(Test, id)
    |> Repo.delete!
    send_resp(conn, 204, "") |> halt
  end

end

test_view.ex

defmodule Testing.TestView do
  use Testing.Web, :view

  def type(), do: "test"

  def attributes(test) do
    Map.take(test, [:email, :name])
  end

  def relationships() do
    %{}
  end

  def url_func(), do: &test_url/3
end