From: g.arrowsmith@... (Graham Arrowsmith)
Date: 2005-02-18T08:49:47+09:00
Subject: rails: many to many  agony

I have two classes: Projects and Company. There are many to many
relationships between companies and project and are joined by table
company_projects

Thing is when I render out a select list I want to make the related
dropdown items selected :

<select name="project[company_id]">
   <% @companies.each do |company| %>
       <option value="<%= company.id %>" >
         <%= ' selected' if company.id == @project.companies.id %>
         <%=company.companyName %>
       </option>
   <% end %>
</select>

However I can't seem to be able to get the project.companies.id (ie 
company_project.company_id) for the related project.

I know this is pretty darn simple but I can't seem to crack it.

Any help would be appreciated!

Graham