insert changeset

thing.ex

    now = DateTime.utc_now()
    entries =
      boxes
      |> Enum.map(fn
        %_{} = box ->
          Map.from_struct(box)
        %{} = attrs ->
          attrs
      end)
      |> Enum.reduce([], fn attrs, acc ->
        if %Box{} |> Box.changeset(attrs) |> Map.get(:valid?) do
          attrs =
            attrs
            |> Map.put(:inserted_at, now)
            |> Map.put(:updated_at, now)
          [ attrs | acc ]
        else
          acc
        end
      end)
    Turf.Repo.insert_all(Box, entries, on_conflict: :nothing, returning: true)
    |> case do
      {count, inserted_boxes} when count >= 0 and is_integer(count) ->
        inserted_boxes
    end