ActiveRecord is not configured correctly when other gem use it

[elct9620]

Steps to reproduce

Install any gem use ActiveRecord will cause this problem. ex. Rails Admin

Expected behavior

The ActiveSupport.run_load_hooks(:active_record, Base) should run after application's initialize loaded.

I found this problem because the default belongs_to_required_by_default becomes nil

Actual behavior

If any gem use ActiveRecord, the Rails will loaded like below:

• config/application.rb
• config/environments/*.rb
• Gems
• config/initializers/**/*.rb
• ...

So, the actual on_load(:active_record) will happens when gem loaded and try to autoload ActiveRecord and not the application initialize.

Every things happen before we configured it.

System configuration

Rails version: 5.0.1

Ruby version: 2.3.1

[y-yagi]

If my understanding is right, that is a matter of gem.
I guess that ActiveRecord::Base has not re-opening in right way. Ref: #23589 (comment)

[elct9620]

Yeah, I think this is same problem.

[maclover7]

Agree with @y-yagi, this seems like an issue with the gems.