I've been trying to use my RoR app to connect to the Facebook API for a day without any luck. I'm using Ruby on Rails and Koala.
If I try to connect as follows:
graph = Koala::Facebook::API.new(User_Token)
Then there is no problem. (Where user token was obtained from https://developers.facebook.com/tools/access_token/)
The problem is that the user token expires. I am aware that there is a way to extend the app User Token, but I would rather not resort to this.
Rather, I am trying to authenticate my app to obtain an APP ACCESS TOKEN which I can use in lieu of the User Token (as per https://developers.facebook.com/docs/facebook-login/access-tokens#apptokens. Please note this refers to the App Access Token, not the App Token which was referred to in the first link).
In order to obtain the App Access Token, I have followed a tutorial and provided this code in my controller:
id = <my app id>
secret = <my app secret>
callbackUrl = "http://localhost:3000/events/appcallback"
@ouath = Koala::Facebook::OAuth.new(id, secret, callbackUrl)
redirect_to @oauth.url_for_oauth_code()
in my routes.rb I have:
match "events/appcallback" => "events#appCalledBack", via: :get
This is purely to test that the callback worked.
My intention was then to do something like:
App_Access_Token = @oauth.get_access_token(params[:code])
But instead I get an error: NoMethodError in EventsController#index undefined method `url_for_oauth_code' for nil:NilClass
Please note that I am not interested in obtaining an access token for a user; I want one for my app, so that I can connect to the api a la:
graph = Koala::Facebook::API.new(App_Access_Token)
Any help would be greatly, greatly appreciated.
