controller_and_view.ex

defmodule TrelloBurndown.SprintController do
  use TrelloBurndown.Web, :controller

  alias TrelloBurndown.Sprint

  def index(conn, _params) do
    sprints = Repo.all(from s in Sprint, preload: [:team])

    render(conn, "index.json", sprints: sprints)
  end

  def create(conn, sprint_params) do
    changeset = Sprint.changeset(%Sprint{}, sprint_params)

    case Repo.insert(changeset) do
      {:ok, sprint} ->
        conn
        |> put_status(:created)
        |> put_resp_header("location", sprint_path(conn, :show, sprint))
        |> render("show.json", sprint: sprint)
      {:error, changeset} ->
        conn
        |> put_status(:unprocessable_entity)
        |> render(TrelloBurndown.ChangesetView, "error.json", changeset: changeset)
    end
  end

  def show(conn, %{"id" => id}) do
    sprint = Repo.get!(Sprint, id)
    render(conn, "show.json", sprint: sprint)
  end

  def update(conn, sprint_params) do
    sprint = Repo.get!(Sprint, sprint_params.id)
    changeset = Sprint.changeset(sprint, sprint_params)

    case Repo.update(changeset) do
      {:ok, sprint} ->
        render(conn, "show.json", sprint: sprint)
      {:error, changeset} ->
        conn
        |> put_status(:unprocessable_entity)
        |> render(TrelloBurndown.ChangesetView, "error.json", changeset: changeset)
    end
  end

  def delete(conn, %{"id" => id}) do
    sprint = Repo.get!(Sprint, id)

    # Here we use delete! (with a bang) because we expect
    # it to always work (and if it does not, it will raise).
    Repo.delete!(sprint)

    send_resp(conn, :no_content, "")
  end
end

defmodule TrelloBurndown.SprintView do
  import IEx
  use TrelloBurndown.Web, :view

  def render("index.json", %{sprints: sprints}) do
    %{data: render_many(sprints, TrelloBurndown.SprintView, "sprint.json")}
  end

  def render("show.json", %{sprint: sprint}) do
    %{data: render_one(sprint, TrelloBurndown.SprintView, "sprint.json")}
  end

  def render("sprint.json", %{sprint: sprint}) do
    params = %{id: sprint.id,
      board_id: sprint.board_id,
      sprint_name: sprint.sprint_name,
      point_total: sprint.point_total,
      team_id: sprint.team_id,
      holidays: sprint.holidays
    }

    IO.inspect(params)

    if Map.get(sprint, :team) do
      params = Map.put(params, :team, Map.get(sprint, :team))

      IO.inspect(params)
      params
    else
      params
    end
  end
end