Backward compatibility with 3.1 cache storing

1 files changed, 11 insertions, 1 deletions

diff --git a/activesupport/lib/active_support/cache.rb b/activesupport/lib/active_support/cache.rb
index 7d032ca984..1a152c68df 100644
--- a/activesupport/lib/active_support/cache.rb
+++ b/activesupport/lib/active_support/cache.rb
@@ -578,7 +578,17 @@ module ActiveSupport
         # it is marshalled and eventually compressed. Both operations yield
         # strings.
         if @value
-          Marshal.load(compressed? ? Zlib::Inflate.inflate(@value) : @value)
+          # In rails 3.1 and earlier values in entries did not marshaled without
+          # options[:compress] and if it's Numeric.
+          # But after commit a263f377978fc07515b42808ebc1f7894fafaa3a
+          # all values in entries are marshalled. And after that code below expects
+          # that all values in entries will be marshaled (and will be strings). 
+          # So here we need a check for old ones.
+          begin
+            Marshal.load(compressed? ? Zlib::Inflate.inflate(@value) : @value)
+          rescue TypeError
+            compressed? ? Zlib::Inflate.inflate(@value) : @value
+          end
         end
       end