From 894f902054fa79a3f2abb55db1cd840284048daf Mon Sep 17 00:00:00 2001
From: Tim Fischbach <tfischbach@codevise.de>
Date: Mon, 18 Dec 2023 13:01:04 +0100
Subject: [PATCH] Declare serialize coder

Required for Rails 7.1.

REDMINE-20487
---
 app/models/pageflow/linkmap_page/color_map_file.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app/models/pageflow/linkmap_page/color_map_file.rb b/app/models/pageflow/linkmap_page/color_map_file.rb
index 49d3391..b9216d7 100644
--- a/app/models/pageflow/linkmap_page/color_map_file.rb
+++ b/app/models/pageflow/linkmap_page/color_map_file.rb
@@ -46,7 +46,7 @@ class ColorMapFile < GeneratedImageFile
 
       do_not_validate_attachment_file_type :attachment
 
-      serialize :attachment_colors
+      serialize :attachment_colors, YAML
 
       def sprite_url
         attachment.url(:sprite)