Fix ActiveRecord::Relation#cache_key for relations with no results

- When relations return no result or 0 result then cache_key should
  handle it gracefully instead of blowing up trying to access
  `result[:size]` and `result[:timestamp]`.
- Fixes #23063.

1 files changed, 5 insertions, 0 deletions

diff --git a/activerecord/test/cases/collection_cache_key_test.rb b/activerecord/test/cases/collection_cache_key_test.rb
index 93e7b9cff6..6b34979e4a 100644
--- a/activerecord/test/cases/collection_cache_key_test.rb
+++ b/activerecord/test/cases/collection_cache_key_test.rb
@@ -74,5 +74,10 @@ module ActiveRecord
 
       assert_match(/\Acomments\/query-(\h+)-0\Z/, empty_loaded_collection.cache_key)
     end
+
+    test "cache_key for queries with offset which return 0 rows" do
+      developers = Developer.offset(20)
+      assert_match(/\Adevelopers\/query-(\h+)-0\Z/, developers.cache_key)
+    end
   end
 end