rail autocomplete

具体就是参考这篇文章: http://ajax.howtosetup.info/savor-the-scriptaculous/create-an-auto-complete-field/ 但是我复制代码发现没有效果,抓包看日志的结果是HTTP422错误(但是GET请求没有问题,POST请求需要带token key?):ActionController::InvalidAuthenticityToken (ActionController::InvalidAuthenticityToken): /vendor/rails/actionpack/lib/action_controller/request_forgery_protection.rb:86:in verify_authenticity_token’ /vendor/rails/activesupport/lib/active_support/callbacks.rb:173:in send’…… google了一下,在相应的controller中添加这句话:protect_from_forgery :only => [:create, :update, :destroy] 这样即可。