has_many through select box in form


I have searched the group and have not found any post that clarifies thsi s=issue to me. Please forgive me in advance if I missed something.

I have 3 models:

Ticket   has_many :citations, :dependent => :nullify   has_many :violations, :through => :citations

Violation   has_many :citations, :dependent => :nullify   has_many :tickets, :through => :citations

Citation   belongs_to :ticket   belongs_to :violation

I am creating the edit a new views for the ticket and would like to be able to relate N violations to the ticket. My intent is to have one select box with a control to add N more if desired. The problem I am running into is getting the select boxes created in a way such that (1) existing items select the correct entry in the select box and (2) when I post the form, Rails recognizes that I am trying to create N relations.

I have tried following examples for a has_many relationship, but it is not working the same.

Following is my current code:



<% form_for @ticket do |f| %>   <%= render :partial => 'form', :locals => { :f => f } %>   <%= submit_tag 'Update Ticket' %> <% end %>




<%= render :partial => 'violation', :collection => @ticket.violations,       :locals => { :f => f, :valid_violations => Violation.find (:all) } %>




<%= f.collection_select :violations, valid_violations, :id, :name %>


Should I be referencing the citation instead of the violation? I cannot figure out where this needs to go. Please help.