config-initializers-dalli-unwrap-and-raw-read.rb

# By default, DalliStore doesn't deal with `raw` correctly when inside the
# LocalCache per-request middleware. The MemCacheClient fixes this already by
# adding another little module. Let's do the same.
#
# A PR has been lodged upstream:
#
#   https://github.com/mperham/dalli/pull/481
#
# Once merged @sj26 will update dalli and remove this workaround.
if defined? ActiveSupport::Cache::DalliStore and Rails.cache.is_a? ActiveSupport::Cache::DalliStore
  module DalliStoreLocalCacheEntryUnwrapAndRaw # :nodoc:
    protected
      def read_entry(key, options)
        retval = super
        if retval.is_a? ActiveSupport::Cache::Entry
          # Must have come from LocalStore, unwrap it
          if options[:raw]
            retval.value.to_s
          else
            retval.value
          end
        else
          retval
        end
      end
  end

  Rails.cache.extend DalliStoreLocalCacheEntryUnwrapAndRaw
end