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-rw-r--r--railties/lib/rails/configuration.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/railties/lib/rails/configuration.rb b/railties/lib/rails/configuration.rb
index cf452ac611..a2fab120cf 100644
--- a/railties/lib/rails/configuration.rb
+++ b/railties/lib/rails/configuration.rb
@@ -16,6 +16,7 @@ module Rails
middleware.use('ActionDispatch::ShowExceptions', lambda { ActionController::Base.consider_all_requests_local })
middleware.use('ActionDispatch::Callbacks', lambda { ActionController::Dispatcher.prepare_each_request })
middleware.use(lambda { ActionController::Base.session_store }, lambda { ActionController::Base.session_options })
+ middleware.use('ActionDispatch::Flash', :if => lambda { ActionController::Base.session_store })
middleware.use('ActionDispatch::ParamsParser')
middleware.use('::Rack::MethodOverride')
middleware.use('::ActionDispatch::Head')