Question

Question:
How to set the Approval Prompt to Auto? It defaults to ‘approval_prompt=force’

Code:
I am setting up the client like this.

   @client = Google::APIClient.new(
     :authorization => :oauth_2,
     :host => 'www.googleapis.com',
     :http_adapter => HTTPAdapter::NetHTTPAdapter.new
   )   
   @client.authorization.client_id = 'xxxx.apps.googleusercontent.com'
   @client.authorization.client_secret = 'xxxx'

Context: Google OAuth2

Client Library: google-api-ruby-client

Reference: Same question for the php client :
Google+ OAuth API store and retrieve tokens after first login and authorization

Signet Documentation. I can’t find the approval_prompt setter
http://signet.rubyforge.org/api/Signet/OAuth2/Client.html

Answer 1

This is how I solved the problem.

I wrote a separate helper method that will generate the Google OAuth URI

def build_auth_uri
return @client.authorization.authorization_uri(
 :approval_prompt => :auto
).to_s 

end

Next, instead of referring to Google OAuth URI directly in my view, I called the helper.

That did the trick.