The railtie included in #419 breaks compatibility with some gems "undefined method `config' for nil:NilClass" Factory Bot > 6.2.0

[tagliala]

Hello,

I was testing the main branch and the application didn't boot because of this error:

~/.rvm/gems/ruby-3.2.2/gems/railties-7.0.8/lib/rails.rb:47:in `configuration': undefined method `config' for nil:NilClass (NoMethodError)

      application.config
                 ^^^^^^^
	from ~/.rvm/gems/ruby-3.2.2/bundler/gems/factory_bot_rails-b965bb8f6430/lib/factory_bot_rails/railtie.rb:25:in `block in <class:Railtie>'
	from ~/.rvm/gems/ruby-3.2.2/gems/activesupport-7.0.8/lib/active_support/lazy_load_hooks.rb:95:in `class_eval'
	from ~/.rvm/gems/ruby-3.2.2/gems/activesupport-7.0.8/lib/active_support/lazy_load_hooks.rb:95:in `block in execute_hook'
	from ~/.rvm/gems/ruby-3.2.2/gems/activesupport-7.0.8/lib/active_support/lazy_load_hooks.rb:85:in `with_execution_control'
	from ~/.rvm/gems/ruby-3.2.2/gems/activesupport-7.0.8/lib/active_support/lazy_load_hooks.rb:90:in `execute_hook'
	from ~/.rvm/gems/ruby-3.2.2/gems/activesupport-7.0.8/lib/active_support/lazy_load_hooks.rb:76:in `block in run_load_hooks'
	from ~/.rvm/gems/ruby-3.2.2/gems/activesupport-7.0.8/lib/active_support/lazy_load_hooks.rb:75:in `each'
	from ~/.rvm/gems/ruby-3.2.2/gems/activesupport-7.0.8/lib/active_support/lazy_load_hooks.rb:75:in `run_load_hooks'
	from ~/.rvm/gems/ruby-3.2.2/gems/activerecord-7.0.8/lib/active_record/base.rb:333:in `<module:ActiveRecord>'
	from ~/.rvm/gems/ruby-3.2.2/gems/activerecord-7.0.8/lib/active_record/base.rb:15:in `<main>'

I think that this is not an issue with Factory Bot Rails, but it is a problem with third-party gems or implementations that does not rely on lazy hooks or autoload to add new modules to ActiveRecord::Base.

I opened this here because updating factory bot triggers this behavior and may affect other users that may search here for a solution

Reproduction Steps

1. Add database_cleaner-active_record to Gemfile (or call ActiveRecord::Base before the module block of config/application.rb)
2. run rails c

Expected behavior

Console opens

Actual behavior

Console does not open and raises an error

System configuration

factory_bot_rails version: main
factory_bot version: 6.3.0
rails version: 7.0.8
ruby version: 3.2.2/3.0.4

Bisected to: b965bb8

Affected gems

• amoeba Use lazy load hooks to extend ActiveRecord::Base amoeba-rb/amoeba#115
• database_cleaner-active_record Issue with the upcoming Factory Bot Rails due to lacking of lazy load hooks DatabaseCleaner/database_cleaner-active_record#89
• chronomodel Use Active Support lazy load hooks  ifad/chronomodel#232

[tagliala]

Reopen because of #432

[tagliala]

Closing again in favour of #433

[marclennox]

I'm having the same issue, which thanks to this thread, I was able to isolate down to the consul gem that we're using (https://github.com/makandra/consul).

I tried forking this gem and making the prescribed change (makandra/consul@04aa667)

Unfortunately, even using this forked version of the gem, I'm getting the same error for anything greater than version 6.2 of the factorbot rails gem.

Is there something else I'm missing?

Thank you

[tagliala]

Maybe this is related to #432

[marclennox]

Thanks @tagliala , this merge request fixes the issue. Until this gets merged, I'll just use a forked copy of factorybot_rails with this change applied.