Facebook Connect with omniauth ,to get token

Ruby
1

here is my session controller

def create
auth_hash = request.env[‘omniauth.auth’]

if session[:user_id]
  # Means our user is signed in. Add the authorization to the user
  User.find(session[:user_id]).add_provider(auth_hash)

  render :text => "You can now login using

#{auth_hash[“provider”].capitalize} too!"
else
# Log him in or sign him up
auth = Authorization.find_or_create(auth_hash)

  # Create the session
  session[:user_id] = auth.user.id

  render :text => "Welcome #{auth.user.name}!"
end

end

here is my authorization model

def self.find_or_create(auth_hash)
unless auth = find_by_provider_and_uid(auth_hash[“provider”],
auth_hash[“uid”])
user = User.create :name => auth_hash[“user_info”][“name”], :email
=> auth_hash[“user_info”][“email”]
auth = create :user => user, :provider => auth_hash[“provider”],
:uid => auth_hash[“uid”]
end

auth

end

here is my User model

def add_provider(auth_hash)
# Check if the provider already exists, so we don’t add it twice
unless
authorizations.find_by_provider_and_uid(auth_hash[“provider”],
auth_hash[“uid”])
Authorization.create :user => self, :provider =>
auth_hash[“provider”], :uid => auth_hash[“uid”]
end
end

i got the error,
You have a nil object when you didn’t expect it!
You might have expected an instance of Array.
The error occurred while evaluating nil.[]

it can direct me to login facebook page. How can i get my facebook
token?
I tried using koala,but some method ,it show me undefined method. How to
get the token from auth_hash = request.env[‘omniauth.auth’]

as i test, the code getting all the basic info of the login users

Any helps are appreciated ,I did a lot of testing but I still cant
manage to figure it out.

2

This auth_hash[“user_info”][“name”] should be changed to this:
auth_hash[“info”][“name”] . It gives you nill because facebook changed
user_info to info. Plus when I take request.env[‘omniauth.auth’] I do it
like that: auth = YAML::load(request.env[‘omniauth.auth’].to_yaml)
because YAML::load will return a hash while I am not sure the way you
have written it will return a hash.