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hi, I''ve got the following tables in mysql notation: CREATE TABLE `nodes` ( `id` int(11) NOT NULL auto_increment, `parent_id` int(11) default ''0'', `group_id` int(11) default ''0'', PRIMARY KEY (`id`), ); CREATE TABLE `groups` ( `parent_id` int(11) NOT NULL default ''0'', `id` int(11) NOT NULL auto_increment,

...children an those children are full tasks so they can have children of their own, Tasks can only be completed if they have no children, a task with children is only completed if all its children are done. this much I have working, I''m trying to add some Ajax support for toggling the done/ not_done flag on the view but I''m hitting a problem and I''m not sure how to get around it. [model] def completed? self.siblings.all? { |x| x.done } if self.parent end [controller] def task_done @task = Task.find(params[:id]) is_complete = !@task.done ids_changed = task_...