Use the derived request_method from AD::Request rather than the raw REQUEST_METHOD from rack.

This takes _method into account so the log shows the method which ActionController sees.

railties/lib/rails/rack/logger.rb

@@ -21,7 +21,7 @@ def before_dispatch(env)
         request = ActionDispatch::Request.new(env)
         path = request.fullpath
 
-        info "\n\nStarted #{env["REQUEST_METHOD"]} \"#{path}\" " \
+        info "\n\nStarted #{request.request_method} \"#{path}\" " \
              "for #{request.ip} at #{Time.now.to_default_s}"
       end