ruby - Retrieve email from Facebook login in a Rails 4 app -


i'm trying create rails 4 app facebook login using devise , omniauth-facebook gem.

i followed tutorial https://www.digitalocean.com/community/tutorials/how-to-configure-devise-and-omniauth-for-your-rails-application

right now, can save user in database, email gets null.

i tried tutorials, of them getting same, email null.

i noticed when click on "sign in" button, following link:

https://www.facebook.com/login.php?skip_api_login=1&api_key=1452548131713566&signed_next=1&next=https%3a%2f%2fwww.facebook.com%2fv2.4%2fdialog%2foauth%3fredirect_uri%3dhttp%253a%252f%252flocalhost%253a3000%252fusers%252fauth%252ffacebook%252fcallback%26state%3db9cfa351943875b105b0b9206a5de31d6fbed43cda4a59d3%26scope%3demail%26response_type%3dcode%26client_id%3d1452548131713566%26ret%3dlogin&cancel_url=http%3a%2f%2flocalhost%3a3000%2fusers%2fauth%2ffacebook%2fcallback%3ferror%3daccess_denied%26error_code%3d200%26error_description%3dpermissions%2berror%26error_reason%3duser_denied%26state%3db9cfa351943875b105b0b9206a5de31d6fbed43cda4a59d3%23_%3d_&display=page

it seems permission error, can't seem figure out why.

here self.from_omniauth method:

def self.from_omniauth(auth)      where(provider: auth.provider, uid: auth.uid).first_or_create |user|        user.provider = auth.provider        user.uid = auth.uid        user.name = auth.info.name        user.email = auth.info.email        user.password = devise.friendly_token[0,20]      end   end

could please check params using

raise params.inspect

on callback page action when,facebook says app sharing user's email.it sends json data system callback url.


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