Devise invitation generate accept_invitation_url - ruby-on-rails

Question

I'm using Devise invitable for invitation. Typically, in the invitation email there will be a link to redirect the invitee to the sign_in page, some url like this
mywebsite.com/users/invitation/accept?invitation_token=J-azZ8fKtkuAyp2VZWQX
This url comes from invitation_instructions.html:
<p><%= link_to 'Accept invitation', accept_invitation_url(#resource, :invitation_token => #token) %></p>
Now I want to return the invitation url in my controller as json response, something like this:
def invite
invitee = User.invite!({:email => email}, current_user)
accept_invitation_url = ....
render :json => accept_invitation_url
end
any idea how to get the accept_invitation_url in the controller? Thanks!

Answer 1

try to include the url helpers module in your controller:
class MyController < ApplicationController
include DeviseInvitable::Controllers::UrlHelpers
def invite
invitee = User.invite!({:email => email}, current_user)
render :json => accept_invitation_url(invitee, :invitation_token => invitee.token)
end
end
The URL Helper module for the Devise Invitable Gem can be found here on github
Ok the raw invitation token is not accessible by default because it's a instance variable without accessor (source), there are two ways you could solve this.
The ugly way, without modifying your model class:
def invite
invitee = User.invite!({:email => email}, current_user)
raw_token = invitee.instance_variable_get(:#raw_invitation_token)
render :json => accept_invitation_url(invitee, :invitation_token => raw_token)
end
The clean way, by adding an attribute reader to your user model class:
# User Model
class User < ActiveRecord::Base
attr_reader :raw_invitation_token
# rest of the code
end
# In your controller
def invite
invitee = User.invite!({:email => email}, current_user)
raw_token = invitee.raw_invitation_token
render :json => accept_invitation_url(invitee, :invitation_token => raw_token)
end
Update (16th October 2015):
It seems like the UrlHelper module has been removed and the invitation is handled as a normal route, so you can remove the include DeviseInvitable::Controllers::UrlHelpers and replace the accept_invitation_url call with:
Rails.application.routes.url_helpers.accept_invitation_url(invitee, :invitation_token => raw_token)

Answer 2

I found out that to use accept_invitation_url outside the standard invitation mailer view you need to include inside the mailer the following helper:
include Devise::Controllers::UrlHelpers
I tried Rails.application.routes.url_helpers.accept_invitation_url(invitee, :invitation_token => raw_token) but it is not working.