验证然后使用虚拟属性来创建devise用户

# app/models/user.rb
class User < ApplicationRecord
  attr_accessor :verification_code

  # 其他Devise相关配置和代码...
end

<!-- app/views/devise/registrations/new.html.erb -->
<%= form_for(resource, as: resource_name, url: registration_path(resource_name)) do |f| %>
  <!-- 其他输入字段... -->
  
  <div class="field">
    <%= f.label :verification_code %>
    <%= f.text_field :verification_code %>
  </div>

  <!-- 其他表单字段... -->

  <div class="actions">
    <%= f.submit "Sign up" %>
  </div>
<% end %>

# app/controllers/application_controller.rb
class ApplicationController < ActionController::Base
  before_action :configure_permitted_parameters, if: :devise_controller?

  protected

  def configure_permitted_parameters
    devise_parameter_sanitizer.permit(:sign_up, keys: [:verification_code])
  end
end

# app/controllers/registrations_controller.rb
class RegistrationsController < Devise::RegistrationsController
  def create
    super do |resource|
      if resource.valid?
        # 进行虚拟属性的验证
        if resource.verification_code == "your_verification_code"
          # 验证通过，创建用户
          resource.save
        else
          # 验证失败，添加错误信息
          resource.errors.add(:verification_code, "is invalid")
          clean_up_passwords resource
          set_minimum_password_length
          respond_with resource
        end
      end
    end
  end
end