method

find_finder_class_for

rails latest stable - Class: ActiveRecord::Validations::UniquenessValidator

find_finder_class_for(record)

private

The check for an existing value should be run from a class that isn’t abstract. This means working down from the current class (self), to the first non-abstract class. Since classes don’t know their subclasses, we have to build the hierarchy between self and the record’s class.

# File activerecord/lib/active_record/validations/uniqueness.rb, line 59
      def find_finder_class_for(record)
        class_hierarchy = [record.class]

        while class_hierarchy.first != @klass
          class_hierarchy.unshift(class_hierarchy.first.superclass)
        end

        class_hierarchy.detect { |klass| !klass.abstract_class? }
      end

find_finder_class_for

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