fg_find_or_create.rb

module FactoryGirl
  module Syntax
    module Methods
      def find_or_create(name, attributes = {}, &block)
        attributes = FactoryGirl.attributes_for(name).merge(attributes)

        klass = FactoryGirl.factory_by_name(name).build_class
        enums = klass.defined_enums
        find_attributes = attributes.clone
        find_attributes.keys.each do |key|
          find_attributes[key] = enums[key.to_s][find_attributes[key]] if enums.has_key? key.to_s
        end
        result = klass.find_by(find_attributes, &block)

        result || FactoryGirl.create(name, attributes, &block)
      end
    end
  end
end

A fork which works with factory girl traits https://gist.github.com/maunovaha/c9a32e217f5dab5d45a7055c69460e21