Pull namespace defaults out of the options hash

If a developer has specified either :path or :as in the options hash then
these should be used as the defaults for :shallow_path and :shallow_prefix.

Fixes #14241.

1 files changed, 10 insertions, 3 deletions

diff --git a/actionpack/lib/action_dispatch/routing/mapper.rb b/actionpack/lib/action_dispatch/routing/mapper.rb
index 314b966bb0..1ad419ec80 100644
--- a/actionpack/lib/action_dispatch/routing/mapper.rb
+++ b/actionpack/lib/action_dispatch/routing/mapper.rb
@@ -792,9 +792,16 @@ module ActionDispatch
         #   end
         def namespace(path, options = {})
           path = path.to_s
-          options = { :path => path, :as => path, :module => path,
-                      :shallow_path => path, :shallow_prefix => path }.merge!(options)
-          scope(options) { yield }
+
+          defaults = {
+            module:         path,
+            path:           options.fetch(:path, path),
+            as:             options.fetch(:as, path),
+            shallow_path:   options.fetch(:path, path),
+            shallow_prefix: options.fetch(:as, path)
+          }
+
+          scope(defaults.merge!(options)) { yield }
         end
 
         # === Parameter Restriction