Rails Devise valid_password

Introduction

Rails Devise valid_password is a feature that is provided by the Devise gem for Ruby on Rails applications. This feature is used for validating user passwords against certain criteria.

Usage

To use the valid_password feature in a Rails application that is using Devise, follow these steps:

1. Make sure that the Devise gem is installed and included in your Gemfile.

gem 'devise'

2. Make sure that the Devise gem is properly configured in your Rails application.

rails generate devise:install
rails generate devise User
rake db:migrate

3. Add the valid_password feature to the User model.

class User < ApplicationRecord
  devise :database_authenticatable, :validatable
  validate :password_complexity

  def password_complexity
    if password.present? and not password.match(/^(?=.*?[A-Z])(?=.*?[a-z])(?=.*?[0-9])(?=.*?[!@#$%^&*()_+]).{8,}$/)
      errors.add :password, 'must include at least one lowercase letter, one uppercase letter, one digit, and one special character, and be at least eight characters long.'
    end
  end
end

4. Customize the password criteria as needed.

Conclusion

Rails Devise valid_password is a powerful feature that can be used to validate user passwords against certain criteria. By following the steps outlined above, you can easily add this feature to your Ruby on Rails application, and customize the password criteria to fit your specific needs.