Rails - Feb 2005 - Associated collection''s associated collections aren''t being loaded?

When an Ecr is loaded by my ecr/show form, the associated collection''s 
collections aren''t being populated.
My associations look like so:
	Part
		has_and_belongs_to_many :kits
		has_many :ecrs

	Kit
		has_and_belongs_to_many :programs
		has_and_belongs_to_many :cutfiles
		has_and_belongs_to_many :parts

	Cutfile
		has_and_belongs_to_many :kits
	
I put a breakpoint in ecrs/show.rhtml, load ecrs/show/2 and this is 
what I see:
		
irb(#<EcrsController:0x15e47f0>):005:0> @ecr.part.kits[0]
=> #<Kit:0x153cf8c
@attributes={"kit_number"=>"2082M29KIT-D",
"part_id"=>"1",
"current_revision"=>"C",
"kit_rawma_number"=>"G9076281E",
"kit_id"=>"1", "quantity"=>"1",
"id"=>"12"}>

so the part has a kit (actually several)

irb(#<EcrsController:0x15e47f0>):006:0> @ecr.part.kits[0].cutfiles
=> []

and the kit has no cutfiles

irb(#<EcrsController:0x15e47f0>):007:0> @ecr.part.kits[0] = 
Kit.find(@ecr.part.kits[0].kit_id)
=> #<Kit:0x15174a8
@attributes={"kit_number"=>"2082M29KIT-D",
"current_revision"=>"C",
"kit_rawma_number"=>"G9076281E",
"id"=>"1"}>

I force the kit to be reloaded

irb(#<EcrsController:0x15e47f0>):008:0> @ecr.part.kits[0].cutfiles
=> [#<Cutfile:0x150e808 @attributes={"cut_data"=>nil, 
"label_data"=>nil, "kit_id"=>"1",
"quantity"=>"5", "id"=>"12",
"revision"=>"A",
"filename"=>"CD10000",
"cutfile_id"=>"1"}>,
#<Cutfile:0x150e7a4 @attributes={"cut_data"=>nil,
"label_data"=>nil,
"kit_id"=>"1", "quantity"=>"2",
"id"=>"13", "revision"=>"A",
"filename"=>"CD6060842",
"cutfile_id"=>"2"}>]

and now it has cutfiles, as it should.

Any advice greatly appreciated!

Regards,
   JJ

John Johnson wrote:
> When an Ecr is loaded by my ecr/show form, the associated
collection''s
> collections aren''t being populated.
Associations are lazy-loaded when you first access them.
jeremy

On 09-Feb-2005, at 11:24, Jeremy Kemper wrote:
> John Johnson wrote:
>> When an Ecr is loaded by my ecr/show form, the associated
collection''s
>> collections aren''t being populated.
>
> Associations are lazy-loaded when you first access them.
> jeremy
Is there something I need to do to give it a hint? This is my code from 
the ecrs/show.rhtml page:

<table>
   <% for kit in @ecr.part.kits %>
   <% kit = Kit.find(kit.kit_id) %>
   <tr><td>Kit</td><td><%= kit.kit_number
%></td>
     <td>
       <table>
	<% for cut in kit.cutfiles %>
	<tr><td><%= cut.filename %></td></tr>
	<% end %>
       </table>
     </td>
   </tr>
   <% end %>
</table>

Without the kit = Kit.find(kit.kit_id) it doesn''t show any cutfiles.

Regards,
   JJ

John Johnson wrote:
> On 09-Feb-2005, at 11:24, Jeremy Kemper wrote:
>> John Johnson wrote:
>>> When an Ecr is loaded by my ecr/show form, the associated
collection''s
>>> collections aren''t being populated.
>> Associations are lazy-loaded when you first access them.
> 
> Is there something I need to do to give it a hint? This is my code from
> the ecrs/show.rhtml page:
> 
> <table>
>   <% for kit in @ecr.part.kits %>
>   <% kit = Kit.find(kit.kit_id) %>
>   <tr><td>Kit</td><td><%= kit.kit_number
%></td>
>     <td>
>       <table>
>     <% for cut in kit.cutfiles %>
>     <tr><td><%= cut.filename %></td></tr>
>     <% end %>
>       </table>
>     </td>
>   </tr>
>   <% end %>
> </table>
> 
> Without the kit = Kit.find(kit.kit_id) it doesn''t show any
cutfiles.
A wild guess without seeing your association declarations:  do you have
an id field in any of your habtm join tables?  Get rid of it.

jeremy