value_for

# File activerecord/lib/active_record/scoping.rb, line 78
      def value_for(scope_type, model)
        raise_invalid_scope_type!(scope_type)
        klass = model
        base = model.base_class
        while klass <= base
          value = @registry[scope_type][klass.name]
          return value if value
          klass = klass.superclass
        end
      end