Luca Pireddu
2/18/2005 4:43:00 PM
Graham Arrowsmith wrote:
> 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
I've just begun using activerecord, so take my suggestion with a grain of
salt :)
project.companies should return an array of companies, no? That makes it
wrong to say project.companies.id. I think you want something like
<%= ' selected' if @project.companies.member?(company) %>
Array#member? uses == to test for equality, and I think I remember reading
that AR overrides == to test for the equality of the "id" field so the
comparison should work.
Hope that helps.
Luca