The Subclasses plugin keeps track of all subclasses of the current model class. Direct subclasses are available via the subclasses method, and all descendent classes are available via the descendents method.
c = Class.new(Sequel::Model) c.plugin :subclasses sc1 = Class.new(c) sc2 = Class.new(c) ssc1 = Class.new(sc1) c.subclasses # [sc1, sc2] sc1.subclasses # [ssc1] sc2.subclasses # [] ssc1.subclasses # [] c.descendents # [sc1, ssc1, sc2]
Initialize the subclasses instance variable for the model.
# File lib/sequel/plugins/subclasses.rb, line 20 def self.apply(model) model.instance_variable_set(:@subclasses, []) end