Merge pull request #3861 from andyjeffries/master

Named Routes shouldn't override existing ones (currently route recognition goes with the earliest match, named routes use the latest match)

actionpack/lib/action_dispatch/routing/route_set.rb

@@ -356,7 +356,7 @@ module ActionDispatch
         conditions = build_conditions(conditions, valid_conditions, path.names.map { |x| x.to_sym })
 
         route = @set.add_route(app, path, conditions, defaults, name)
-        named_routes[name] = route if name
+        named_routes[name] = route if name && !named_routes[name]
         route
       end
 

actionpack/test/controller/routing_test.rb

@@ -713,12 +713,12 @@ class RouteSetTest < ActiveSupport::TestCase
     assert_equal set.routes.first, set.named_routes[:hello]
   end
 
-  def test_later_named_routes_take_precedence
+  def test_earlier_named_routes_take_precedence
     set.draw do
       match '/hello/world' => 'a#b', :as => 'hello'
       match '/hello'       => 'a#b', :as => 'hello'
     end
-    assert_equal set.routes.last, set.named_routes[:hello]
+    assert_equal set.routes.first, set.named_routes[:hello]
   end
 
   def setup_named_route_test