How to auto-generate passwords in Rails Devise?

Question

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

Answer 1

I'm using devise-security gem and have specefic password_complexity requirements as follows:

config.password_complexity = { digit: 1, lower: 1, upper: 1 }

If you use this code: Devise.friendly_token.first(password_length) to generate the password, you are not always guaranteed to get a password that matches your complexity.

So I wrote a password generator that will respect your password_complexity and will generate a random complaint password:

class PasswordGenerator
  include ActiveModel::Validations
  validates :password, 'devise_security/password_complexity': Devise.password_complexity
  attr_reader :password

  def initialize
    @password = Devise.friendly_token.first(Devise.password_length.first) until valid?
  end
end

You can use it as follows:

PasswordGenerator.new.password # "qHc165ku"