Unexpected `nil` values when using ActiveSupport's `deep_transform_keys` with nested hashes in Ruby on Rails 7
I'm building a feature where I'm working with an scenario where using `deep_transform_keys` from ActiveSupport on a nested hash results in unexpected `nil` values. I'm working with Ruby on Rails 7, and the goal is to transform the keys to snake_case for a deeply nested hash structure. Here’s a snippet of what I have: ```ruby nested_hash = { 'UserName' => { 'FirstName' => 'John', 'LastName' => 'Doe' }, 'OrderDetails' => { 'OrderId' => 123, 'ItemName' => 'Widget' } } transformed_hash = nested_hash.deep_transform_keys { |key| key.underscore } puts transformed_hash.to_json ``` However, when I run this, I get: ``` { "user_name": { "first_name": "John", "last_name": "Doe" }, "order_details": { "order_id": null, "item_name": "Widget" } } ``` As you can see, `OrderId` is transformed to `order_id`, but its value is `nil`. I’ve tried debugging this by checking the keys before and after the transformation, and I see that the key exists. I also confirmed that the nested hash structure is intact prior to transformation. I suspect this might be related to how deep transformations handle certain types of keys or values. Is there something I'm missing here? Any insights on how to prevent these unwanted `nil` values during the transformation would be greatly appreciated! The project is a application built with Ruby. I appreciate any insights! I recently upgraded to Ruby 3.10. Any ideas what could be causing this?