Hi everyone, I want to build a form following this idea: I have Assignment, Activity, Task, AssignmentActivity, ActivityTask and AssignmentActivityTask models 1 assignment has many activities and 1 activity has many tasks (there''s a many-to-many relation between: Assignment - Activity AssignmentActivity - Task, and a One-to-many relation: Activity - Task) I''ve made the Assignment-Activity form using this idea: http://railscasts.com/episodes/17-habtm-checkboxes and the form looks like this _form.html.erb <% form_for @assignment do |f|%> <% Activity.all.each do |a|%> <% check_box_tag "assignment[activity_ids][]", a.id, @assignment.activity_ids.include?(a.id)%> | <% a.name%> <%end%> <%end%> So it saves inside the assignment, all the activities that I''ve checked. The problem comes when I tried to add the ability to save task inside this form. This is what I''ve tried _form.html.erb <% form_for @assignment do |f|%> <% Activity.all.each do |a|%> <%= check_box_tag "assignment[activity_ids][]", a.id, @assignment.activity_ids.include?(a.id)%> | <%= a.name%> <br> <% a.tasks.each do |t|%> #THIS <%= check_box_tag "assignment[activity_ids][][]", t.id, "Something here"%> | <%= t.task_name %><><br> <%end%> <%end%> <%end%> But I''m not sure how to write the line after the comment. So when it saves it should save inside the assignment the activities and also the tasks the I''ve checked Is there a way of doing this? Thanks in advance Javier Q. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.