A hacky DataMapper monkey patch to mark properties as dirty even if they have not changed

gistfile1.rb

module DataMapper
  module Resource
    def taint! property
      self.persisted_state = State::Dirty.new(self) unless self.persisted_state.kind_of?(State::Dirty)
      self.persisted_state.original_attributes[properties[property]] = Object.new
    end
  end
end

# Example:
# my_resource.array_prop << 123
# my_resource.taint! :array_prop
# my_resource.save