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    <p>to "enable" confirmable, you just need to add it to your model, e.g.:</p> <pre><code>class User # ... devise :confirmable , .... # ... end </code></pre> <p>after that, you'll have to create and run a migration which adds the required columns to your model:</p> <pre><code># rails g migration add_confirmable_to_devise class AddConfirmableToDevise &lt; ActiveRecord::Migration def self.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 add_index :users, :confirmation_token, :unique =&gt; true end def self.down remove_index :users, :confirmation_token remove_column :users, :unconfirmed_email remove_column :users, :confirmation_sent_at remove_column :users, :confirmed_at remove_column :users, :confirmation_token end end </code></pre> <p>see: <a href="https://stackoverflow.com/questions/3034784/adding-confirmable-module-to-an-existing-site-using-devise">Adding confirmable module to an existing site using Devise</a></p> <p>I'd recommend to check the source code to see how Confirmable works:</p> <p><a href="https://github.com/plataformatec/devise/blob/master/lib/devise/models/confirmable.rb" rel="nofollow noreferrer">https://github.com/plataformatec/devise/blob/master/lib/devise/models/confirmable.rb</a></p> <p>You could also check the RailsCast on Devise:</p> <p><a href="http://railscasts.com/episodes/209-introducing-devise" rel="nofollow noreferrer">http://railscasts.com/episodes/209-introducing-devise</a></p> <p>Next it would be best to search for example applications on GitHub</p>
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    1. POHow do I enable :confirmable in Devise?
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    1. COThis should be marked as the answer, as well as adding a bit from "http://stackoverflow.com/a/7577878/602588" (answer below).
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    2. COYou will also need to add the line: add_column :users, :unconfirmed_email, :string
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    3. COis that a recent change in Devise?
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