Absinthe enum from EctoEnum

notation.ex

  @doc """
  Defines an enum in your Absinthe schema from an enum defined with `EctoEnum`.

  ## Example

  If you defined an enum with `EctoEnum` like this:

      defmodule MyApp.Enums do
          import EctoEnum

          defenum Status, ["pending", "in_progress", "finished"]
      end

  Then you can define the same enum in your Absinthe schema like this:

      defmodule CoachWeb.Types.Exercise do
        use Absinthe.Schema.Notation

        # change import to the module where you put the macro
        import MyAppWeb.Notation

        enum_from_ecto :status, MyApp.Status
      end
  """
  defmacro enum_from_ecto(name, module) when is_atom(name) do
    name = Macro.expand(name, __CALLER__)
    module = Macro.expand(module, __CALLER__)
    values = Keyword.keys(module.__enum_map__())

    quote do
      enum(unquote(name), values: unquote(values))
    end
  end