无法在ruby / ruby​​-on-rails中将String转换为整数

时间：2011-06-27 18:37:37

标签： ruby ruby-on-rails-3

我想验证用户是否存在，如果存在，请进行密码匹配。

我的控制器看起来像这样：

def attempt_login
    authorized_user = User.authenticate(params[:username], params[:password])
    if authorized_user
        flash[:notice] = "Successfully logged in."
        redirect_to(:action => 'menu')
    else
        flash[:notice] = "Invalid username/password"
        redirect_to(:action => 'login')
    end
end

模型如下：

def self.authenticate(username="", password="")
    user = User.find_by_username(username)
    if user && user.password_match?(password)
        return user
    else
        return false
    end
end

def password_match?(password="")
    hashed_password == User.hash_with_salt(password,salt)
end

在执行此操作的过程中，我收到TypeError（无法将String转换为Integer）。我怀疑当我想为authorized_user设置一个值时发生错误，但不知道如何处理这个问题。

编辑： 我的服务器日志为空。但我可以发布框架跟踪：

activesupport (3.0.8) lib/active_support/descendants_tracker.rb:23:in `delete'
activesupport (3.0.8) lib/active_support/descendants_tracker.rb:23:in `block in clear'
activesupport (3.0.8) lib/active_support/descendants_tracker.rb:21:in `each'
activesupport (3.0.8) lib/active_support/descendants_tracker.rb:21:in `clear'
railties (3.0.8) lib/rails/application/bootstrap.rb:59:in `block (2 levels) in <module:Bootstrap>'
activesupport (3.0.8) lib/active_support/callbacks.rb:420:in `_run_call_callbacks'
actionpack (3.0.8) lib/action_dispatch/middleware/callbacks.rb:44:in `call'
rack (1.2.3) lib/rack/sendfile.rb:107:in `call'
actionpack (3.0.8) lib/action_dispatch/middleware/remote_ip.rb:48:in `call'
actionpack (3.0.8) lib/action_dispatch/middleware/show_exceptions.rb:47:in `call'
railties (3.0.8) lib/rails/rack/logger.rb:13:in `call'
rack (1.2.3) lib/rack/runtime.rb:17:in `call'
activesupport (3.0.8) lib/active_support/cache/strategy/local_cache.rb:72:in `call'
rack (1.2.3) lib/rack/lock.rb:11:in `block in call'
<internal:prelude>:10:in `synchronize'
rack (1.2.3) lib/rack/lock.rb:11:in `call'
actionpack (3.0.8) lib/action_dispatch/middleware/static.rb:30:in `call'
railties (3.0.8) lib/rails/application.rb:168:in `call'
railties (3.0.8) lib/rails/application.rb:77:in `method_missing'
railties (3.0.8) lib/rails/rack/log_tailer.rb:14:in `call'
rack (1.2.3) lib/rack/content_length.rb:13:in `call'
rack (1.2.3) lib/rack/handler/webrick.rb:52:in `service'
E:/Ruby192/lib/ruby/1.9.1/webrick/httpserver.rb:111:in `service'
E:/Ruby192/lib/ruby/1.9.1/webrick/httpserver.rb:70:in `run'
E:/Ruby192/lib/ruby/1.9.1/webrick/server.rb:183:in `block in start_thread'

如果它可以提供帮助，那么这就是development.log：

Started POST "/access/attempt_login" for 127.0.0.1 at 2011-06-27 20:19:19 +0200
DEPRECATION WARNING: config.action_view.debug_rjs will be removed in 3.1, from 3.1 onwards you will need to install prototype-rails to continue to use RJS templates . (called from <top (required)> at G:/Projects/basicsocial/app/controllers/application_controller.rb:1)
Processing by AccessController#attempt_login as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"jvGVYJEypK9sWoaaa5c2OwzBKmCMX7h7Wp28vBH9wfw=", "username"=>"test88", "password"=>"[FILTERED]", "commit"=>"Log In"}
<-[1m<-[36mSQL (7.0ms)<-[0m  <-[1mdescribe `users_pages`<-[0m
<-[1m<-[35mSQL (2.0ms)<-[0m  SHOW TABLES
<-[1m<-[36mUser Load (0.0ms)<-[0m  <-[1mSELECT `users`.* FROM `users` WHERE `users`.`username` = 'test88' LIMIT 1<-[0m
Redirected to http://localhost:3000/admin
Completed 302 Found in 545ms

TypeError (can't convert String into Integer):
Rendered E:/Ruby192/lib/ruby/gems/1.9.1/gems/actionpack-3.0.8/lib/action_dispatch/middleware/templates/rescues/_trace.erb (1.0ms)
Rendered E:/Ruby192/lib/ruby/gems/1.9.1/gems/actionpack-3.0.8/lib/action_dispatch/middleware/templates/rescues/_request_and_response.erb (5.0ms)
Rendered E:/Ruby192/lib/ruby/gems/1.9.1/gems/actionpack-3.0.8/lib/action_dispatch/middleware/templates/rescues/diagnostics.erb within rescues/layout (16.0ms)

我使用salt变量来更好地保护用户的页面。这是存储在数据库中的东西。

3 个答案:

答案 0 :(得分：0)

显然代码没有任何问题。它可能与我的浏览器缓存或某种性质有关，因为它在第二天就开始工作了。很抱歉给您带来不便。

答案 1 :(得分：0)

我遇到了同样的问题，花了好几个小时试图修复它。事实证明，我已经离开了一个方法，教程告诉我事先删除了一些视频：

 def self.hash(password="")
   Digest::SHA1.hexdigest(password)
 end

在本教程中，这已被方法

取代 
 def self.make_salt(username="")
   Digest::SHA1.hexdigest("Use #{username} with #{Time.now} to make salt")
 end

 def self.hash_with_salt(password="", salt="")
   Digest::SHA1.hexdigest("Put #{salt} on the #{password}")
 end

一旦我评论了这个方法，错误就消失了。我仍然不明白为什么这个错误首先出现了。我添加了一个问题和更多细节here。

答案 2 :(得分：0)

只是想让你知道我也有这个问题。 问题很快得到解决，但服务器在之后的每个请求中都显示错误。 在重新启动服务器之前，代码更改尚未反映出来。

touch tmp/restart.txt还不够，所以我不得不重新启动服务器/etc/init.d/apache2 restart以删除错误消息。

$ apache2 -v
Server version: Apache/2.2.16 (Debian)
Server built:   Apr  1 2012 07:14:38

$ ruby -v
ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-linux]

$ gem list passenger
*** LOCAL GEMS ***
passenger (3.0.13)

$ bundle exec rails -v
Rails 3.0.7
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