Rails - Best-Practice: How to create dependent has_one relations

Question

Could you tell me whats the best practice to create has_one relations?

f.e. if i have a user model, and it must have a profile...

How could i accomplish that

Answer 1

Probably not the cleanest solution, but we already had a database with half a million records, some of which already had the 'Profile' model created, and some of which didn't. We went with this approach, which guarantees a Profile model is present at any point, without needing to go through and retroactively generate all the Profile models.

alias_method :db_profile, :profile
def profile
  self.profile = Profile.create(:user => self) if self.db_profile.nil?
  self.db_profile
end