未加载SimpleCaptcha映像(无法批量分配受保护的属性)

Question

问题是simple_captcha不能正常工作。验证码图像未显示。请帮帮忙。

controller.rb

if simple_captcha_valid?
  do something
else
  do something else
end

view.html.rb

<div class="captcha">
  <%= show_simple_captcha(label: "", placeholder: "", code_type: "numeric") %>   
</div>

Gemfile

gem 'simple_captcha2', require: 'simple_captcha'

错误

SimpleCaptcha::SimpleCaptchaData Load (1.3ms)  SELECT "simple_captcha_data".* FROM "simple_captcha_data" WHERE "simple_captcha_data"."key" = '******' ORDER BY "simple_captcha_data"."id" ASC LIMIT 1
**WARNING: Can't mass-assign protected attributes for SimpleCaptcha::SimpleCaptchaData: key**

Answer 1

我也有同样的问题(对于Rails3)。但是要解决这个问题，可以添加

simple_captcha_gem_dir/lib/simple_captcha/simple_captcha_data.rb

attr_accessible :key, :value

其中，在我的例子中，simple_captcha_gem_dir是~/.rvm/gems/ruby-1.9.3-p484/bundler/gems/simple-captcha-2602bf19a63d

(当然，对于生产环境，您可以创建一个分支，而不是编辑本地gem文件)

Answer 2

这是另一个解决方案：

将其放入初始化器(config/initializers/simple_captcha.rb)

Rails.configuration.to_prepare do
  class SimpleCaptcha::SimpleCaptchaData < ::ActiveRecord::Base
    attr_protected
  end
end

感谢@zealot128

Answer 3

查看您的调用<%= show_simple_captcha(:label => "", :placeholder => "", :code_type => "numeric") %>，您似乎正在使用基于控制器的simple_captcha实现

我没有看到您的ApplicationController代码，但请确保app/controllers/application.rb中存在以下行

ApplicationController < ActionController::Base
  include SimpleCaptcha::ControllerHelpers
end

更新模型的示例：

class User < ActiveRecord::Base
  apply_simple_captcha
end

class User < ActiveRecord::Base
  apply_simple_captcha :message => "The secret Image and code were different", :add_to_base => true
end