Ensure compatibility between ActionDispatch::Request::Session and Rack

Adding the `each` method is required for ensuring compatibility between
Rails, and other Rack frameworks (like Sinatra, etc.), that are mounted
within Rails, and wish to use its session tooling. Prior to this, there
was an inconsistency between ActionDispatch::Request::Session and
Rack::Session::Cookie, due to the absence of the `each` method. This
should hopefully fix that error. :)

For a full integration test with Sinatra and a standalone Rack
application, you can check out the gist for that here: https://gist.github.com/maclover7/08cd95b0bfe259465314311941326470.

Solves #15843.

1 files changed, 5 insertions, 1 deletions

diff --git a/actionpack/lib/action_dispatch/request/session.rb b/actionpack/lib/action_dispatch/request/session.rb
index 42890225fa..47568f6ad0 100644
--- a/actionpack/lib/action_dispatch/request/session.rb
+++ b/actionpack/lib/action_dispatch/request/session.rb
@@ -9,7 +9,7 @@ module ActionDispatch
 
       # Singleton object used to determine if an optional param wasn't specified
       Unspecified = Object.new
-      
+
       # Creates a session hash, merging the properties of the previous session if any
       def self.create(store, req, default_options)
         session_was = find req
@@ -198,6 +198,10 @@ module ActionDispatch
         @delegate.merge!(other)
       end
 
+      def each(&block)
+        to_hash.each(&block)
+      end
+
       private
 
       def load_for_read!