# Undefined method \`cache\_template\_extension' - Not finding how to fix that

**URL:** <https://www.ruby-forum.com/t/undefined-method-cache-template-extension-not-finding-how-to-fix-that/165343>\
**Category:** Rails\
**Created:** [April 12, 2009, 8:36pm UTC](https://www.ruby-forum.com/t/undefined-method-cache-template-extension-not-finding-how-to-fix-that/165343 "2009-04-12T20:36:40Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![felipecsl](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/f/5f8ce5/32.png) [@felipecsl](https://www.ruby-forum.com/u/felipecsl)\
**Post date:** [April 12, 2009, 8:36pm UTC](https://www.ruby-forum.com/t/undefined-method-cache-template-extension-not-finding-how-to-fix-that/165343/1 "2009-04-12T20:36:40Z")

</div>

Hello I upgraded my rails to the version 2.3.2, but after restarting  
my server, this error happened,

I researched in some threads and discovered that  
cache\_template\_extensions is deprecated, but i couldn’t find it in  
anyway in my

code, please, can you help me to fix this issue???

Thank you.

=\> Booting Mongrel  
=\> Rails 2.3.2 application starting on [http://0.0.0.0:3000](http://0.0.0.0:3000)  
C:/Rails/ruby/lib/ruby/gems/1.8/gems/rails-2.3.2/lib/initializer.rb:  
580:in `send ': undefined method `cache\_template\_extensions=’ for  
ActionView::Base:Class (NoM  
ethodError)  
from C:/Rails/ruby/lib/ruby/gems/1.8/gems/rails-2.3.2/lib/  
initializer.rb  
:580:in `initialize_framework_settings' from C:/Rails/ruby/lib/ruby/gems/1.8/gems/rails-2.3.2/lib/ initializer.rb :579:in `each’  
from C:/Rails/ruby/lib/ruby/gems/1.8/gems/rails-2.3.2/lib/  
initializer.rb  
:579:in `initialize_framework_settings' from C:/Rails/ruby/lib/ruby/gems/1.8/gems/rails-2.3.2/lib/ initializer.rb :576:in `each’  
from C:/Rails/ruby/lib/ruby/gems/1.8/gems/rails-2.3.2/lib/  
initializer.rb  
:576:in `initialize_framework_settings' from C:/Rails/ruby/lib/ruby/gems/1.8/gems/rails-2.3.2/lib/ initializer.rb :155:in `process’  
from C:/Rails/ruby/lib/ruby/gems/1.8/gems/rails-2.3.2/lib/  
initializer.rb  
:113:in `send' from C:/Rails/ruby/lib/ruby/gems/1.8/gems/rails-2.3.2/lib/ initializer.rb :113:in `run’  
… 6 levels…  
from C:/Rails/ruby/lib/ruby/gems/1.8/gems/rails-2.3.2/lib/  
commands/serve  
r.rb:84  
from C:/Rails/ruby/lib/ruby/site\_ruby/1.8/rubygems/  
custom\_require.rb:27:  
in `gem_original_require' from C:/Rails/ruby/lib/ruby/site_ruby/1.8/rubygems/ custom_require.rb:27: in `require’  
from script/server:3