mobilizon/lib/web/views/changeset_view.ex

defmodule Mobilizon.Web.ChangesetView do
  @moduledoc """
  View for changesets in case of errors
  """
  use Mobilizon.Web, :view

  @doc """
  Traverses and translates changeset errors.

  See `Ecto.Changeset.traverse_errors/2` and
  `Mobilizon.Web.ErrorHelpers.translate_error/1` for more details.
  """
  def translate_errors(changeset) do
    Ecto.Changeset.traverse_errors(changeset, &translate_error/1)
  end

  def render("error.json", %{changeset: changeset}) do
    # When encoded, the changeset returns its errors
    # as a JSON object. So we just pass it forward.
    %{errors: translate_errors(changeset)}
  end
end