Heroku confirmation token - Devise error (even with Sendgrid)

Question

I am using Heroku, Devise & Sendgrid.

These are my settings in environment/production.rb:

  config.action_mailer.default_url_options = { :host => 'myapp.herokuapp.com' }

  # ActionMailer Config
  # Setup for production - deliveries, no errors raised
  config.action_mailer.delivery_method = :smtp
  config.action_mailer.perform_deliveries = true
  config.action_mailer.raise_delivery_errors = false
  config.action_mailer.default :charset => "utf-8"

  config.action_mailer.smtp_settings = {
    address: "smtp.sendgrid.net",
    port: 25,
    domain: "myapp.herokuapp.com",
    authentication: "plain",
    user_name: ENV["SENDGRID_USERNAME"],
    password: ENV["SENDGRID_PASSWORD"]
  }

I have set the ENV variables on Heroku fine, and when I register an account it sends the email correctly to the right email address.

It is just when I click the confirmation link, I get a bunch of errors and it doesn't confirm the account:

Started GET "/users/confirmation?confirmation_token=dZf6Jqc7x88q8tyH5bZp" for XX.XX.XX.XX at 2013-05-20 20:59:29 +0000
2013-05-20T20:59:29.413847+00:00 app[web.1]: 
2013-05-20T20:59:29.413847+00:00 app[web.1]: NameError (uninitialized constant Confirmation):
2013-05-20T20:59:29.413847+00:00 app[web.1]:   

Edit 1

This is my User.rb the Devise portion:

class User < ActiveRecord::Base
  rolify
  # Include default devise modules. Others available are:
  # :token_authenticatable, :confirmable,
  # :lockable, :timeoutable and :omniauthable
  devise :database_authenticatable, :registerable, :confirmable,
         :recoverable, :rememberable, :trackable, :validatable

  # Setup accessible (or protected) attributes for your model
  attr_accessible :role_ids, :as => :admin
  attr_accessible :name, :email, :password, :password_confirmation, :remember_me

Edit 2

This is what happens in my development.log when I do the same thing.

Started GET "/users/confirmation?confirmation_token=Gs3UYE2m6D84zfuXfa66" for 127.0.0.1 at 2013-05-20 17:12:39 -0500
Processing by ConfirmationsController#show as HTML
  Parameters: {"confirmation_token"=>"Gs3UYE2m6D84zfuXfa66"}
Completed 500 Internal Server Error in 10ms

NameError - uninitialized constant Confirmation:
  (gem) activesupport-3.2.13/lib/active_support/dependencies.rb:520:in `load_missing_constant'

I have run all the migrations, maybe I need to generate a new migration for the Confirmable module? How do I do that?

Edit 3

This is what my users table within my schema.rb looks like:

  create_table "users", :force => true do |t|
    t.string   "email",                  :default => "", :null => false
    t.string   "encrypted_password",     :default => "", :null => false
    t.string   "reset_password_token"
    t.datetime "reset_password_sent_at"
    t.datetime "remember_created_at"
    t.integer  "sign_in_count",          :default => 0
    t.datetime "current_sign_in_at"
    t.datetime "last_sign_in_at"
    t.string   "current_sign_in_ip"
    t.string   "last_sign_in_ip"
    t.datetime "created_at",                             :null => false
    t.datetime "updated_at",                             :null => false
    t.string   "name"
    t.string   "confirmation_token"
    t.datetime "confirmed_at"
    t.datetime "confirmation_sent_at"
    t.string   "unconfirmed_email"
    t.float    "sales_today"
    t.float    "sales_this_week"
    t.float    "sales_lifetime"
    t.boolean  "is_seller"
  end

So it seems to me that the Confirmable module is all setup.

Edit 4

I forgot that I actually do override the ConfirmationsController:

class ConfirmationsController < Devise::ConfirmationsController
  load_and_authorize_resource

  protected
    def after_confirmation_path_for(resource_name, resource)
      if resource.has_role? :seller
        new_item_path
      else
        root_path
      end
    end
end

Answer 1

It looks to me like when you added your :confirmable model you forgot to migrate the database. I can tell by these lines

Started GET "/users/confirmation?confirmation_token=dZf6Jqc7x88q8tyH5bZp" for XX.XX.XX.XX at 2013-05-20 20:59:29 +0000
2013-05-20T20:59:29.413847+00:00 app[web.1]: 
2013-05-20T20:59:29.413847+00:00 app[web.1]: NameError (uninitialized constant Confirmation):

mainly

NameError (uninitialized constant Confirmation):

The error is somewhere in your app. I'm guessing in the database, because devise probably won't even set up the model without the DB table.

You overrode the ConfirmationsController. Do not forget to call super on every method you override.

Also: just because your schema.rb says a column exists, it doesn't mean it actually does. MAKE SURE TO CHECK YOUR MIGRATION IN TO VERSION CONTROL, OTHERWISE IT WILL NEVER REACH THE SERVER.

Now: Go into your terminal and run heroku run rails console. Try out some code in there, and post any error logs you get. this is a very powerful tool.

Best,

Brian