236 - OmniAuth Part 2”

ASCIIcasts - “Episode 236 - OmniAuth Part 2”:

Unfortunately there is no easy solution to this problem. What we’ll do is keep the validation and redirect the user to a form where they can fix any problems if the validation fails when we try to save the new user. We’ll change the code in create so that if the validation fails when we try to save a new user they’ll be redirected the new user registration page. We don’t want to lose the user’s OmniAuth information when this happens and so we’ll store it in the session. The OmniAuth hash can sometimes contain too much data to fit in the cookie session store so we’ll remove the extra key. This key stores a lot of information that we don’t need to get the user registered so it is safe to remove it.

Full article: http://asciicasts.com/episodes/236-omniauth-part-2