Exception on Ruby 1.9.3

[nd2s]

On Ruby 1.9.3 got following exception: NoMethodError (undefined method `value' for #String:0x00000004326848)

I don't know why exactly but this seems to fix it (I guess it will break it for Ruby 1.8): https://github.com/mqt/dalli-store-extensions/commit/dd0b5ee7779600e8ff7e63491e23a5b51c647f6d

[pierrevalade]

Got the same error.

[jjb]

I'm getting this too, and @mqt's change fixes it for me

[ghost]

I too have same error with ruby 1.9.2

[aehven]

I get a similar error with ruby 1.9.2:

undefined method `value' for "---\n- views/my_key\n":String

and it goes away when I clear the cache. Can someone explain how I get @mqt's fix? Do I have to pull the gem from somewhere else or download the code into the vendors dir and change it there?

[nd2s]

You have to use the gem from my repo. But the fix is old and I don't really know what I did there. Wouldn't use that code on a production system..

I switched from memcached to redis then, which supports listing of keys and works much nicer. (I got some other issues with memcached and keys not being invalidated).

[aehven]

Oh. Thanks for the advice, I'll look into Redis.

Thanks,

• Adam

On Dec 21, 2012, at 5:15 PM, mqt notifications@github.com wrote:

You have to use the gem from my repo. But the fix is old and I don't really know what I did there. Wouldn't use that code on a production system..

I switched from memcached to redis then, which supports listing of keys and works much nicer. (I got some other issues with memcached and keys not being invalidated).

— Reply to this email directly or view it on GitHub.

[aehven]

Thanks again, @mqt, for the advice. I'm using Redis now and it seems to work.

For anyone else running into this, the use of Redis needs to be tweaked when using it as the cache_store. First of all, you must load the 'redis-rails' gem as well as the 'redis' gem. Then you must deal with the fact that Redis matches keys by a simplified wildcard notation rather than ruby Regexp. I found the details here:

http://dev.mensfeld.pl/2012/06/rails-3-2-redis-store-views-caching-and-expire_fragment-with-regexp/

But in my case I preferred to just fix my sweeper so that it uses redis wild-cards instead of adding the code shown in the link above to convert Regexp to redis wild-card keys. So all I did was fix the fragment string designations in my sweeper to use wildcards and add this to my redis.rb initializer to force redis to delete all matching keys when given a string:

module ActiveSupport
  module Cache
    class RedisStore < Store
      def delete(key, options)
        delete_matched(key, options)
      end
    end
  end
end