Ensure `#reset_column_information` clears child classes as well

I've added a redundant test for this under the attributes API as well,
as that also causes this bug to manifest through public API (and
demonstrates that calling `reset_column_information` on the child
classes would be insufficient)

Since children of a class should always share a table with their parent,
just reloading the schema from the cache should be sufficient here.
`reload_schema_from_cache` should probably become public and
`# :nodoc:`, but I'd rather avoid the git churn here.

Fixes #22057

1 files changed, 3 insertions, 0 deletions

diff --git a/activerecord/lib/active_record/model_schema.rb b/activerecord/lib/active_record/model_schema.rb
index a9bd094a66..e3f304b0af 100644
--- a/activerecord/lib/active_record/model_schema.rb
+++ b/activerecord/lib/active_record/model_schema.rb
@@ -339,6 +339,9 @@ module ActiveRecord
         @columns = nil
         @columns_hash = nil
         @attribute_names = nil
+        direct_descendants.each do |descendant|
+          descendant.send(:reload_schema_from_cache)
+        end
       end
 
       # Guesses the table name, but does not decorate it with prefix and suffix information.