improvement: add Ash.Error.error_descriptions

lib/ash/actions/update/update.ex

@@ -271,6 +271,8 @@ defmodule Ash.Actions.Update do
     with %{valid?: true} = changeset <- Ash.Changeset.validate_multitenancy(changeset),
          %{valid?: true} = changeset <- changeset(changeset, domain, action, opts),
          %{valid?: true} = changeset <- authorize(changeset, opts),
+         %{valid?: true} = changeset <-
+           Ash.Changeset.add_atomic_validations(changeset, opts[:actor], []),
          {:ok, result, instructions} <- commit(changeset, domain, opts) do
       add_notifications(
         changeset.resource,

lib/ash/error/error.ex

@@ -86,6 +86,26 @@ defmodule Ash.Error do
     end
   end
 
+  def error_descriptions(errors) do
+    errors
+    |> to_error_class()
+    |> Map.get(:errors)
+    |> Enum.group_by(& &1.class)
+    |> Enum.sort_by(fn {group, _} ->
+      Enum.find_index([:forbidden, :invalid, :framework, :unknown], &(&1 == group))
+    end)
+    |> Enum.map_join("\n\n", fn {class, class_errors} ->
+      header = header(class) <> "\n\n"
+
+      header <> Enum.map_join(class_errors, "\n", &"* #{Exception.message(&1)}")
+    end)
+  end
+
+  defp header(:forbidden), do: "Forbidden"
+  defp header(:invalid), do: "Input Invalid"
+  defp header(:framework), do: "Framework Error"
+  defp header(:unknown), do: "Unknown Error"
+
   def ash_error?(value), do: splode_error?(value, __MODULE__)
 
   def set_path(%struct{errors: errors} = container, path)