Controllers are plain functions that take a request map and return tuples:

Erlang:

create(#{json := Params}) -> CS = kura_changeset:cast(pet, #{}, Params, [name, species]), CS1 = kura_changeset:validate_required(CS, [name, species]), case my_repo:insert(CS1) of {ok, Pet} -> {status, 201, #{}, #{data => Pet}}; {error, Changeset} -> {status, 422, #{}, #{errors => Changeset}} end.

Elixir:

def create(%{json: params}) do cs = :kura_changeset.cast(:pet, %{}, params, [:name, :species]) cs = :kura_changeset.validate_required(cs, [:name, :species]) case MyRepo.insert(cs) do {:ok, pet} -> {:status, 201, %{}, %{data: pet}} {:error, changeset} -> {:status, 422, %{}, %{errors: changeset}} end end

Getting started with Elixir (Mix):

mix archive.install hex nova_new mix nova.new my_app iex -S mix

Getting started with Erlang (Rebar3):

rebar3 new nova my_app cd my_app rebar3 nova serve

The ecosystem includes Kura (an Ecto-inspired database layer with schemas, changesets, and migrations), WebSocket support, distributed pub/sub via OTP's pg module, OpenTelemetry integration, code generators, and OpenAPI spec generation.

We recently published The Nova Book (https://novaframework.github.io/nova-book), a step-by-step guide to building a full app from scratch. There's also a pet_store example (https://github.com/Taure/pet_store) showing a complete REST API with Nova + Kura.

On Hex: https://hex.pm/packages/nova (v0.13.7, Apache 2.0)