How to modify Devise's message on a specific step of its workflow?

Question

After Sign Up a new user I get redirected to a Sign In page with the following flash[:alert] message:

"You need to sign in or sign up before continuing."

My User model uses Devise's :confirmable module so it would be nice if after Sign Up a user would see a modified message instead:

"Thanks for signing up. We have sent you a confirmational email. Please check your email"

Is there a way to achieve it?

---

Notes about Devise workflow:

Currently a user has no idea that a confirmational email was sent to him. He will see Devise's failure message only when he tries to Log In using unconfirmed email address:

"You have to confirm your email address before continuing."

---

Here's solution: https://github.com/plataformatec/devise/wiki/How-To:-Redirect-to-a-specific-page-on-successful-sign-up-(registration)

I just followed first 2 steps:

1) Create RegistrationsController:

class RegistrationsController < Devise::RegistrationsController
  protected


  # TODO: will this  method be triggered one day?
  def after_sign_up_path_for(resource)
    # '/an/example/path'
    new_user_session_path
  end

  def after_inactive_sign_up_path_for(resource)
    new_user_session_path
  end
end

2) Change routes to:

devise_for :users, :controllers => {:registrations => 'registrations'}

Answer 1

First, add devise :confirmable to your models/user.rb

devise :confirmable

Then, do the migration as:

rails g migration add_confirmable_to_devise

Will generate db/migrate/YYYYMMDDxxx_add_confirmable_to_devise.rb. Add the following to it in order to do the migration.

class AddConfirmableToDevise < ActiveRecord::Migration
  # Note: You can't use change, as User.update_all will fail in the down migration
  def up
    add_column :users, :confirmation_token, :string
    add_column :users, :confirmed_at, :datetime
    add_column :users, :confirmation_sent_at, :datetime
    # add_column :users, :unconfirmed_email, :string # Only if using reconfirmable
    add_index :users, :confirmation_token, unique: true
    # User.reset_column_information # Need for some types of updates, but not for update_all.
    # To avoid a short time window between running the migration and updating all existing
    # users as confirmed, do the following
    User.all.update_all confirmed_at: Time.now
    # All existing user accounts should be able to log in after this.
    # Remind: Rails using SQLite as default. And SQLite has no such function :NOW.
    # Use :date('now') instead of :NOW when using SQLite.
    # => execute("UPDATE users SET confirmed_at = date('now')")
    # Or => User.all.update_all confirmed_at: Time.now
  end

  def down
    remove_columns :users, :confirmation_token, :confirmed_at, :confirmation_sent_at
    # remove_columns :users, :unconfirmed_email # Only if using reconfirmable
  end
end

Do the migration rake db:migrate

If not using reconfirmable, update the configuration in config/initializers/devise.rb

config.reconfirmable = false

Hope this will help you.