```ruby
require 'redis-store'

module ActiveSupport
  module Cache
    class RedisContentStore < RedisStore
      
      SET_PREFIX = "obj:"
      
      #----------
      
      def expire_obj(obj)
        key = obj.respond_to?(:obj_key) ? obj.obj_key : obj
        Rails.logger.debug("expire_obj on ", key)
        objs = @data.smembers(SET_PREFIX+key)
        if objs && !objs.empty?
          @data.del(*objs)
        end
      end
      
      #----------
      
      def read_entry(key,options)
        super(key,options)
      end
      
      #----------
      
      def write_entry(key,entry,options)
        # expire this key from existing sets
        @data.keys(SET_PREFIX+"*").each do |obj|
          @data.srem(obj,key)
        end
        
        # now add it to any objects passed in
        if options && options[:objects]
          options[:objects].each do |obj|
            okey = obj.respond_to?(:obj_key) ? obj.obj_key : obj.to_s
            Rails.logger.debug("adding #{key} to cache set for #{okey}")
            @data.sadd(SET_PREFIX+okey,key)
          end
        end
        
        # write our cache
        super(key,entry,options)
      end
      
      #----------
      
      def delete_entry(key, options)
        super(key,options)
      end
      
    end
  end
end```

Make options hashes for read_entry and write_entry optional
user
```ruby
require 'redis-store'

module ActiveSupport
  module Cache
    class RedisContentStore < RedisStore
      
      SET_PREFIX = "obj:"
      
      #----------
      
      def expire_obj(obj)
        key = obj.respond_to?(:obj_key) ? obj.obj_key : obj
        Rails.logger.debug("expire_obj on ", key)
        objs = @data.smembers(SET_PREFIX+key)
        if objs && !objs.empty?
          @data.del(*objs)
        end
      end
      
      #----------
      
      def read_entry(key,options={})
        super(key,options)
      end
      
      #----------
      
      def write_entry(key,entry,options={})
        # expire this key from existing sets
        @data.keys(SET_PREFIX+"*").each do |obj|
          @data.srem(obj,key)
        end
        
        # now add it to any objects passed in
        if options && options[:objects]
          options[:objects].each do |obj|
            okey = obj.respond_to?(:obj_key) ? obj.obj_key : obj.to_s
            Rails.logger.debug("adding #{key} to cache set for #{okey}")
            @data.sadd(SET_PREFIX+okey,key)
          end
        end
        
        # write our cache
        super(key,entry,options)
      end
      
      #----------
      
      def delete_entry(key, options)
        super(key,options)
      end
      
    end
  end
end```
assistant