nested habtm in views

Hi folks,

hope someone can help me with this:

There are four tables:
Courses (has_many) -> CourseModules (has_and_belongs_to_many) ->
CourseModulesLectures (has_and_belongs_to_many) ->Lectures.

I'd like to get a table with all courses, modules and lectures, which
works quite fine:

<% unless @course.course_modules.empty? %>
<% @course.course_modules.each do |m| %>
  <%=h m.semester %>
  <%=h m.title %>
  <% unless m.lectures.empty? %>
  <% m.lectures.each do |lecture| %>
    <%= link_to lecture.title, lecture %> <!-- -->
  <% end %>
  <% end %>
<% end %>
<% end %>
(stripped unnecessary lines)

The problem is, that 'lecture' in the marked line refers to the id of
the habtm-table 'CourseModulesLectures', and not to the correct id of
the lecture. How can I fix that?

Any ideas?

Thanks a lot!

Maybe:

  <%= link_to lecture.title, lecture.lecture_id %> <!-- -->

?

Any ideas? Is there any mistake in my design? Should I use has_many
:through?