Rails - May 2006 - Model validation when using ajax & form_remote_tag...

I am trying to understand why model validation error reporting in Rails 
is so complicated compared to non ajax model validation. In my normal 
form I use <%= error_messages_for ''user'' %> in my view
and I get a nice
error message displayed when the user inputs invalid information into 
the form.

When I convert that form to use Ajax using form_remote_tag the 
error_messages_for no longer works ,because  the page does not get 
reloaded. I have searched everywhere for a simple elegant solution 
inline with DHH " beautiful code" line. In the code for Typo they
partly
solve the issue by calling this method when a begin & rescue trap is 
called:

def render_error(object = '''', status = 500)
    render(:text => (object.errors.full_messages.join(", ") rescue 
object.to_s), :status => status)
  end

Throwing a 500 status error stops that annyoing "cannot find template"
message.

This just renders text to the browser. Not very nice really. I want the 
SAME form as the error_messages_for gives.

There should be a better solutions to this to give comminality to error 
messages across an application. I have tried using a helper method 
passing into it the object but that does not seem to work.

Help!


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