A lil somethin somethin

gistfile1.rb

class Fun
  def errors
    @errors ||= []
  end
  def valid?
    @errors.clear
    self.class.validations.each do |method, validation|
      if instance_eval(&validation[:prc]) == false
        @errors << {:validator => method, :message => validation[:message]}
      end
    end
    return @errors.empty?
  end  
  class << self
    def validations
      @validations ||= Hash.new{|h,k| h[k]={} }
    end
    def validates(method, options={}, &block)
      self.validations[method][:prc] = block
      self.validations[method][:message] = options[:message] != nil ? options[:message] : "Invalid"
    end
  end
end

#Validators need to 
class Have < Fun
  attr_accessor :cat
  attr_accessor :cat_id
  attr_accessor :email
  
  validates :cat_id_or_email, :message => "Cat_id or Email must be present" do
    (self.cat_id != nil) || (self.email != nil)
  end
  
  validates :cat_is_nil do
    self.cat == nil
  end
end