changeset_view.ex

defmodule App.ChangesetView do
  use App, :view

  @doc """
  Traverses and translates changeset errors.
  See `Ecto.Changeset.traverse_errors/2`
  """
  def translate_errors(changeset) do
    Ecto.Changeset.traverse_errors(changeset, &translate_error/1)
  end
  
  @doc """
  Translates a changeset error.
  """
  def translate_error({msg, opts}) do
    if count = opts[:count] do
      Gettext.dngettext(Web.Gettext, "errors", msg, msg, count, opts)
    else
      Gettext.dgettext(Web.Gettext, "errors", msg, opts)
    end
  end

  def render("error.json", %{changeset: changeset}) do
    %{errors: translate_errors(changeset)}
  end
end