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henrik / config--initializers--rails4_to_rails3_downgradability.rb
Created Jun 18, 2015
Fix "NoMethodError: undefined method `sweep'" error when downgrading from Rails 4 to Rails 3.
View config--initializers--rails4_to_rails3_downgradability.rb
# Without this fix, downgrading from Rails 4 to Rails 3 causes session cookies to blow up.
# The way the flash is stored in the session changed in a backwards-incompatible way.
if Rails::VERSION::MAJOR == 3
module ActionDispatch
class Flash
def call(env)
if (session = env['rack.session']) && (flash = session['flash'])
You can’t perform that action at this time.