Although if you’re really serious about conversion to 2.0 you might
want to attack this from the other direction.
user_path is missing because you don’t have a named route for user.
In a conventional rails 2.0 restful application the controller for
User would be named UsersController, and in the config/routes.rb you’d
have
ActionController::Routing::Routes.draw do |map|
map.resources :users
which would generate a bunch of named routes and path/url helpers
including the missing user_path
AND in form for you can use
form_for @user
and it would automatically figure out what to generate including
making the form post if @user is a new record, and update if not.