Rails - Nov 2005 - Problem with CheckboxHABTM

A simple syntax problem, I''m sure, but I could really use some help.

I''m following the habtm checkbox page on the wiki:
http://wiki.rubyonrails.com/rails/pages/CheckboxHABTM

I have items in a habtm relationship with formats.

The view looks like this:
       <ul>
       <% item.item_type.formats.each do |fmt| %>
         <li><%= check_box_tag("item[format_ids][]", fmt.id, 
@item.formats.include?(fmt)) %>
         <%= h(fmt.name) %></li>
       <% end %>
       </ul>

As you would expect, this produces something like this:
<li><input checked="checked"
id="item[format_ids][]"
name="item[format_ids][]" type="checkbox"
value="1" />CD</li>

I''m using update_attributes in the controller, but breakpoint reveals 
this error message:
ActiveRecord::RecordNotFound: Couldn''t find Format with 
ID=#<Format:0x22744a0>

I''m running:
rails (0.14.2, 0.13.1, 0.12.1)

Obviously something is going wrong getting the id... but I can''t 
understand what. Can anyone please help?

Thanks,
Rob

Robert Wheaton wrote:
> A simple syntax problem, I''m sure, but I could really use some
help.
>
> I''m following the habtm checkbox page on the wiki:
> http://wiki.rubyonrails.com/rails/pages/CheckboxHABTM
>
> I have items in a habtm relationship with formats.
>
> The view looks like this:
>       <ul>
>       <% item.item_type.formats.each do |fmt| %>
>         <li><%= check_box_tag("item[format_ids][]",
fmt.id,
> @item.formats.include?(fmt)) %>
>         <%= h(fmt.name) %></li>
>       <% end %>
>       </ul>
>
> As you would expect, this produces something like this:
> <li><input checked="checked"
id="item[format_ids][]"
> name="item[format_ids][]" type="checkbox"
value="1" />CD</li>
>
> I''m using update_attributes in the controller, but breakpoint
reveals
> this error message:
> ActiveRecord::RecordNotFound: Couldn''t find Format with 
> ID=#<Format:0x22744a0>
>
> I''m running:
> rails (0.14.2, 0.13.1, 0.12.1)
>
> Obviously something is going wrong getting the id... but I can''t 
> understand what. Can anyone please help?
Looks like it''s returning an object when you want an id (String value).
Check fmt.id versus fmt

Kev

Beautiful -- thank you!

On 3-Nov-05, at 1:01 AM, Kev Jackson wrote:
>
> Looks like it''s returning an object when you want an id (String 
> value).  Check fmt.id versus fmt
>
> Kev