push is_a?(Dispatcher) check in to one place

1 files changed, 1 insertions, 9 deletions

diff --git a/actionpack/lib/action_dispatch/journey/route.rb b/actionpack/lib/action_dispatch/journey/route.rb
index 1ba91d548e..9f0a3af902 100644
--- a/actionpack/lib/action_dispatch/journey/route.rb
+++ b/actionpack/lib/action_dispatch/journey/route.rb
@@ -16,14 +16,6 @@ module ActionDispatch
         @app         = app
         @path        = path
 
-        # Unwrap any constraints so we can see what's inside for route generation.
-        # This allows the formatter to skip over any mounted applications or redirects
-        # that shouldn't be matched when using a url_for without a route name.
-        if app.is_a?(Routing::Mapper::Constraints)
-          app = app.app
-        end
-        @dispatcher  = app.is_a?(Routing::RouteSet::Dispatcher)
-
         @constraints = constraints
         @defaults    = defaults
         @required_defaults = nil
@@ -99,7 +91,7 @@ module ActionDispatch
       end
 
       def dispatcher?
-        @dispatcher
+        @app.dispatcher?
       end
 
       def matches?(request)