Duration.to_string (#464)

See #458

Author: SteffenDE

lib/phoenix/live_dashboard/pages/ecto_stats_page.ex

@@ -3,7 +3,7 @@ defmodule Phoenix.LiveDashboard.EctoStatsPage do
   use Phoenix.LiveDashboard.PageBuilder
   import Phoenix.LiveDashboard.Helpers
 
-  @compile {:no_warn_undefined, [Decimal, EctoPSQLExtras, {Ecto.Repo, :all_running, 0}]}
+  @compile {:no_warn_undefined, [Decimal, Duration, EctoPSQLExtras, {Ecto.Repo, :all_running, 0}]}
   @disabled_link "https://hexdocs.pm/phoenix_live_dashboard/ecto_stats.html"
   @page_title "Ecto Stats"
 
@@ -277,7 +277,7 @@ defmodule Phoenix.LiveDashboard.EctoStatsPage do
     {sorted, length(rows)}
   end
 
-  defp format(_, %struct{} = value) when struct in [Decimal, Postgrex.Interval],
+  defp format(_, %struct{} = value) when struct in [Decimal, Duration, Postgrex.Interval],
     do: struct.to_string(value)
 
   defp format(:bytes, value) when is_integer(value),