Looking for way to test for an unsaved record in Rails 3

Rails
#1

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 S. [email protected]

#2

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.