lib/manage_cache.rb
def delete_cache(key_name)
      [cache_key_for(key_name), "views/#{cache_key_for(key_name)}"].each do |key|
        Rails.cache.delete(key)
      end
    end
def delete_cache(key_name)
      [cache_key_for(key_name), "views/#{cache_key_for(key_name)}"].each do |key|
        Rails.cache.delete(key)
      end
    end
the rails helper method 'cache (name, opts) do ...'
 adds some extras to the cache key.
 To run with this gem, you have to add 'skip_digest: true'.
 Any other options will prevent correct cache deletion!!