Check if a record can be deleted when using foreigner gem

foreigner_can_delete_ar_patch.rb

module ActiveRecord
  class Base
    def can_delete?
      this_model_name = self.class.name
      associations = Kernel.const_get(this_model_name).reflect_on_all_associations
      has_one_models = associations.map{ |x| x.name.to_s if x.macro == :has_one }.compact
      has_one_models.each do |child|
        if self.send(child).present?
          return false
        end
      end
      has_many_models = associations.map{ |x| x.name.to_s.pluralize if x.macro == :has_many }.compact
      has_many_models.each do |child|
        if self.send(child).present? && self.send(child).count > 0
          return false
        end
      end
      true
    end
  end
end