def handle_event("validate_upload", params, socket) do
    errors =
      for entry <- socket.assigns.uploads.editor_images.entries,
          err <- upload_errors(socket.assigns.uploads.editor_images, entry),
          do: error_to_string(err)

    socket = put_flash(socket, :error, Enum.join(errors, ", "))
    
    {:noreply, socket}
  end