I’m currently building a small CMS for a client, with Ruby on Rails 2.3.8 and i’m using the rails-ckeditor plugin. I had a lot of these deprecation warnings :
DEPRECATION WARNING: ActionView::SafeBuffer is deprecated! Use ActiveSupport::SafeBuffer instead. (called from local_constants at /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.3.8/lib/active_support/core_ext/module/introspection.rb:74)
So i did that. And i also needed to go into my layouts that included ckeditor and replace this line :
With this line, instead :
After restarting my dev mongrel server, that resolved my problem. No more deprecation warnings.
I hope it will help someone else.
Update: it seems that this issue was fixed in the last commit of the rails-ckeditor plugin. So update your plugin and you should be OK now.