Rails - Jun 2008 - combining associated models into a single xml or json object

It is clear how to return a model with model.to_json or model.to_xml.
But how does one returned an object that with associations included?
I thought the following would work but it seems to only return the
base model.

folder = Folder.find_by_id(7, :include => [permissions])

respond_to do |f|
  ...
  f.json { render :json => folder.to_json}
end

Thanks,
j
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No sooner do I post than I realize my mistake.

(:include is the message to .to_json, not ''find'')

i.e.

f.json { render :json => folder.to_json(:include=> [permissions]) }

Thanks,
j


On Jun 3, 11:58 am, Joshua Kolden
<crackcreat...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> It is clear how to return a model with model.to_json or model.to_xml.
> But how does one returned an object that with associations included?
> I thought the following would work but it seems to only return the
> base model.
>
> folder = Folder.find_by_id(7, :include => [permissions])
>
> respond_to do |f|
>   ...
>   f.json { render :json => folder.to_json}
> end
>
> Thanks,
> j
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