Honor shallow: false on nested resources

Previously there was no way to place a non-shallow resource inside a parent
with `shallow: true` set. Now you can set `shallow: false` on a nested child
resource to generate normal (non-shallow) routes for it.

Fixes #23890.

1 files changed, 4 insertions, 1 deletions

diff --git a/actionpack/lib/action_dispatch/routing/mapper.rb b/actionpack/lib/action_dispatch/routing/mapper.rb
index 16b430c36e..81ffea4d5d 100644
--- a/actionpack/lib/action_dispatch/routing/mapper.rb
+++ b/actionpack/lib/action_dispatch/routing/mapper.rb
@@ -1362,6 +1362,8 @@ module ActionDispatch
         #   as a comment on a blog post like <tt>/posts/a-long-permalink/comments/1234</tt>
         #   to be shortened to just <tt>/comments/1234</tt>.
         #
+        #   Set shallow: false on a child resource to ignore a parent's shallow parameter.
+        #
         # [:shallow_path]
         #   Prefixes nested shallow routes with the specified path.
         #
@@ -1724,7 +1726,8 @@ to this:
               return true
             end
 
-            if options.delete(:shallow)
+            if options[:shallow]
+              options.delete(:shallow)
               shallow do
                 send(method, resources.pop, options, &block)
               end