Use nested_scope? not shallow? to determine whether to copy options

The method `shallow?` returns false if the parent resource is a singleton so
we need to check if we're not inside a nested scope before copying the :path
and :as options to their shallow equivalents.

Fixes #14388.

1 files changed, 5 insertions, 1 deletions

diff --git a/actionpack/lib/action_dispatch/routing/mapper.rb b/actionpack/lib/action_dispatch/routing/mapper.rb
index 357829e59f..5de0a0cbc6 100644
--- a/actionpack/lib/action_dispatch/routing/mapper.rb
+++ b/actionpack/lib/action_dispatch/routing/mapper.rb
@@ -707,7 +707,7 @@ module ActionDispatch
           options[:path] = args.flatten.join('/') if args.any?
           options[:constraints] ||= {}
 
-          unless shallow?
+          unless nested_scope?
             options[:shallow_path] ||= options[:path] if options.key?(:path)
             options[:shallow_prefix] ||= options[:as] if options.key?(:as)
           end
@@ -1547,6 +1547,10 @@ module ActionDispatch
             RESOURCE_METHOD_SCOPES.include? @scope[:scope_level]
           end
 
+          def nested_scope? #:nodoc:
+            @scope[:scope_level] == :nested
+          end
+
           def with_exclusive_scope
             begin
               old_name_prefix, old_path = @scope[:as], @scope[:path]