How to auto-generate passwords in Rails Devise?

ruby-on-rails devise
ohho picture ohho · Sep 10, 2010 · Viewed 17.4k times · Source

I am trying out how Devise works with one of my projects for user authentication. There is a user requirement that their admin should be able to generate a batch of username and user's password from time to time, and then the admin will email the new username and password to his users.

Assume the admin has the knowledge of direct SQL on the MySQL database, how can the generated usernames/passwords recognized by Devise? Thanks!

Answer

jeanmartin picture jeanmartin · Aug 29, 2011

Use the Devise.friendly_token method:

password_length = 6
password = Devise.friendly_token.first(password_length)
User.create!(:email => '[email protected]', :password => password, :password_confirmation => password)

FYI: Devise.friendly_token returns a 20 character token. In the example above, we're chopping off the first password_length characters of the generated token by using the String#first method that Rails provides.

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