Insert Facebook email address in database with Omniauth-facebook and Devise

Question

I've created a sign up/in feature on my app using device and omniauth. Users can sign up through a sign up form and then sign in. They can also sign in through Facebook.

But when I sign up with my own email adres john@whosjohn.com and then sign in with my Facebook account which also uses john@whosjohn.com I've created 2 different users.

I've check with User.all what's going on and when I log in throughFacebook I'm not saving an email adres. The value is nill.

Can someone explain how I can save the users email adres that's linked to his Facebook account into my user table?

user.rb

class User < ActiveRecord::Base
  devise :database_authenticatable, :registerable, :recoverable, :rememberable, :trackable, :validatable,:omniauthable, :omniauth_providers => [:facebook]

  def password_required?
    false
  end

  def self.from_omniauth(auth)
    where(provider: auth.provider, uid: auth.uid).first_or_create do |user|
      user.email = auth.info.email
      user.password = Devise.friendly_token[0,20]
      user.name = auth.info.name   # assuming the user model has a name
    end
  end

end

Answer 1

Try this:

Create a Authorization model

rails g model Authorization

In migration add following code

class CreateAuthorizations < ActiveRecord::Migration
  def change
    create_table :authorizations do |t|
      t.string :provider
      t.string :uid
      t.integer :user_id
      t.string :token
      t.string :secret
      t.timestamps
    end
  end
end

then

rake db:migrate

In your models/authorization.rb

belongs_to :user

In your models/user.rb

has_many :authorizations

def self.from_omniauth(auth)
  authorization = Authorization.where(:provider => auth.provider, :uid => auth.uid.to_s).first_or_initialize
  authorization.token = auth.credentials.token
  if authorization.user.blank?
    user = User.where('email = ?', auth["info"]["email"]).first
    if user.blank?
     user = User.new
     user.password = Devise.friendly_token[0,10]
     user.email = auth.info.email
     user.save
    end
   authorization.user_id = user.id       
  end
  authorization.save
  authorization.user
end

Hope this will help you.