Re: [Rails] warning: toplevel constant Configuration referenced by ActiveRecord::Base::Configuration

Ruby on Rails Monday, April 25, 2016

The simplest way to trigger this warning (it's not Rails-related BTW) is this:

$ irb

irb(main):001:0> class Foo

irb(main):002:1> end

=> nil

irb(main):003:0> Foo::Array.new

(irb):3: warning: toplevel constant Array referenced by Foo::Array

=> []

So it seems that in addition to ActiveRecord::Base:Configuration there's another class called Configuration defined at the top level.

Did you define this class? If not, does any of your dependencies define this class?

Best regards

Greg Navis

I help small tech companies to scale Heroku-hosted Rails apps.

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