class RSpec::Rails::ActiveRecordConfiguration

def self.initialize_activerecord_configuration(config)
  config.before :suite do
    # This allows dynamic columns etc to be used on ActiveRecord models when creating instance_doubles
    if defined?(ActiveRecord) && defined?(ActiveRecord::Base) && defined?(::RSpec::Mocks) && (::RSpec::Mocks.respond_to?(:configuration))
      ::RSpec::Mocks.configuration.when_declaring_verifying_double do |possible_model|
        target = possible_model.target
        if Class === target && ActiveRecord::Base > target && !target.abstract_class?
          target.define_attribute_methods
        end
      end
    end
  end
end