Rails - Aug 2011 - Looking for way to test for an unsaved record in Rails 3

I need to do an html delete if the record isn''t saved, so in Rails 2,
all I had to do was:
<% if person_form.object.new_record? %>
        <%= link_to_function "Delete", "delete_row()"
%>
<% else %>
....

object doesn''t seem to be there, and rails 3 seems angry about the
fields_for that defines person_form in Rails 2.
I''m trying to do this in Rails 3 and having no luck.. Please help

Thanks

Bob Smith <bsm2th-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>

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Both ActionView::Helpers::FormBuilder#object() and 
ActiveRecord::Persistence#new_record?() exist in rails 3.  Here is how 
"Ruby on Rails 3 Tutorial" uses them:


<%= form_for(@user) do |f| %>

  <%= render ''some/partial'', :object => f.object %>

Then a local variable named ''object'' is available in the
partial and it
is equal to @user (at least that is the way things appear to work).


class User < ActiveRecordBase

  ...
  ...
  def some_action
    if new_record?
       #do something
    end
  end

> and rails 3 seems angry about the
> fields_for that defines person_form in Rails 2
You should post your code.

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