Rails - Jul 2006 - best way to handle failed updates when using REST ?

I''m playing with simply_restfuld/REST. My (test) controller has the 
following actions:

   index, new, create, show, edit, update, destroy

Everything is fine at the moment except on how to handle failed updates.

As I see it, there are 3 scenarios with a failed update:

  - redirect to edit action, but the form''s data will be lost.
  - render the edit action, but the url will not be quite right.
  - add a form to the update view, but then i''m repeating myself (can 
the update view render data in the first place ?).

I don''t see a good solution to this "problem". Sorry if
i''m being
pedantic with this question, I just want to get a good grasp of the REST 
way of doing things and this is in the way :)

thanks in advance


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