FriendlyId suggest - ruby-on-rails-3

Question

I want to use FriendlyId to achieve this localhost3000/users/edu/profile but I do not know how to do it!
I have these models User and UserProfile
class User < ActiveRecord::Base
has_one :user_profile, :dependent => :destroy
extend FriendlyId
friendly_id :name, :use => :slugged
end
class UserProfile < ActiveRecord::Base
attr_accessible :user_id, :name, :surname, :nickname
belongs_to :user
end
How do I load in name of User the name of UserProfile? and
How do you update name of User when the name of UserProfile changes?
For the first I used
class User < ActiveRecord::Base
...
def name
if user_profile
"#{user_profile.name}"
end
end
But I can't make it change when I update or create a new Profile in UserProfile.
Using Ruby 1.9.3 and Rails 3.2.13.

Answer 1

If I understood it correctly, your problem is about sharing data between models, not about FriendlyId.
It seems delegate is your best bet here. It's a method in ActiveSupport that allows one model to expose another model's methods as their own.
class User < ActiveRecord::Base
delegate :name, :name=, :to => :user_profile
end
Reference: http://api.rubyonrails.org/classes/Module.html#method-i-delegate
The reason to delegate both :name and :name= is that the former method allows you to read from that attribute (getter), while the latter allows you to write to it (setter).
Before making these changes you'll want to run a migration to remove the name field from the users table in the database, since from now on you'll be using the data in the other model.
rails g migration remove_name_from_users name:string