attribute base_class
Ruby on Rails 7.0.10
Since v7.0.10Returns the class descending directly from ActiveRecord::Base, or an abstract class, if any, in the inheritance hierarchy.
If A extends ActiveRecord::Base, A.base_class will return A. If B descends from A through some arbitrarily deep hierarchy, B.base_class will return A.
If B < A and C < B and if A is an abstract_class then both B.base_class and C.base_class would return B as the answer since A is an abstract_class.