Cache-Money: Only use in Production?

I use the cache-money gem for transparent usage of Memcached. Using the supplied config file it is enabled on all modes (development, test, production). Is there a way to only activate cache-money in production mode?

It's not immediately clear how to do this, and it's a total pain dealing with caching in development mode.

From stackoverflow

• In your initializer, skip initialization if you're running in development mode:

  unless 'development' == RAILS_ENV
    require 'cache_money'
    ....
  

  Matt Darby : I wish it was that easy. When cache-money isn't loaded, my indexed models fail to load: /usr/local/lib/ruby/gems/1.8/gems/activerecord-2.3.0/lib/active_record/base.rb:1963:in `method_missing_without_paginate': undefined method `index' for # (NoMethodError)

  wesgarrison : Could you set the TTL option to zero in development? That way it wouldn't save the cached result?

• Thanks to Obie Fernandez for a great offline hint: Stub out cache-money's #index method to do nothing. This provides a place for the #index statements in the models to go, and stops the error mentioned above.

  Here is my full cache_money.rb lib:

  if RAILS_ENV != 'development'
    require 'cache_money'
  
    config = YAML.load(IO.read(File.join(RAILS_ROOT, "config", "memcached.yml")))[RAILS_ENV]
    $memcache = MemCache.new(config)
    $memcache.servers = config['servers']
  
    $local = Cash::Local.new($memcache)
    $lock = Cash::Lock.new($memcache)
    $cache = Cash::Transactional.new($local, $lock)
  
    class ActiveRecord::Base
      is_cached :repository => $cache
    end
  else
    # If we're in development mode, we don't want to
    # deal with cacheing oddities, so let's overrite
    # cache-money's #index method to do nothing...
    class ActiveRecord::Base
      def self.index(*args)
      end
    end
  end
  

• By turning off cache-money in test you can't know if its interfering with your code.

  I did this instead:

  require 'cache_money'
  require 'memcache'
  
  if RAILS_ENV == 'test'
    $memcache = Cash::Mock.new
  else
    config = YAML.load(IO.read(File.join(RAILS_ROOT, "config", "memcached.yml")))[RAILS_ENV]
    $memcache = MemCache.new(config)
    $memcache.servers = config['servers']
  end
  
  $local = Cash::Local.new($memcache)
  $lock = Cash::Lock.new($memcache)
  $cache = Cash::Transactional.new($local, $lock)
  
  class ActiveRecord::Base
    is_cached :repository => $cache
  end