I am a beginner with Ruby and Rails but I managed to use OmniAuth for authentication via Facebook. Everything works fine, I am able to create users and they are able to login with Facebook.
The problem is, I would like to take some of the user data (such as email, profile photo, etc.) and save it.
Going through the README (https://github.com/mkdynamic/omniauth-facebook), I managed to find:
Here's an example Authentication Hash available in request.env['omniauth.auth']:
{
:provider => 'facebook',
:uid => '1234567',
:info => {
:nickname => 'jbloggs',
:email => 'joe@bloggs.com',
:name => 'Joe Bloggs',
:first_name => 'Joe',
:last_name => 'Bloggs',
:image => 'http://graph.facebook.com/1234567/picture?type=square',
:urls => { :Facebook => 'http://www.facebook.com/jbloggs' },
:location => 'Palo Alto, California',
:verified => true
}
}
I tried to do more searching on the Authentication Hash and got this which lists some of the information that can be fetched: https://github.com/intridea/omniauth/wiki/Auth-Hash-Schema
The thing is, I asked for certain permissions. The question is, how do I know what sort of information Facebook is sending? Unfortunately, saying the info is in request.env['omniauth.auth'] does me not much good. How do I fetch the information from here?
I am a real beginner going through the Rails tutorial (http://ruby.railstutorial.org/) but trying to create my own app by trial and error.
request.env['omniauth.auth'] will give you a hash. Check the Ruby docs for what you can do with a hash.
http://ruby-doc.org/core-1.9.3/Hash.html
For any elements that are not always going to be there you can just check for blank? (a Rails convenience method), e.g.
omniauth = request.env['omniauth.auth']
unless omniauth['info']['email'].blank?
send_spam omniauth['info']['email'] # ;)
end
You would probably find the following screencast useful if you haven't seen it already: