18、Rails开发：从基础到高级的Action Pack实践

Rails开发：从基础到高级的Action Pack实践

1. 处理请求参数

在Rails开发中，当我们提交表单时，可能会遇到创建文章失败的情况。这是因为在 Article 模型中设置了验证规则，防止创建标题或正文为空的新文章对象。

我们可以查看命令提示符中服务器的输出，了解具体发生了什么。例如，当我们提交一个空表单时，服务器输出如下：

Started POST "/articles" for 192.168.1.105 at 2013-07-06 02:46:45 -0500
Processing by ArticlesController#create as HTML
  Parameters: {"utf8"=>"",  
"authenticity_token"=>"fZ2oh3Tt6wx3mjxXBOH3kIZie/Jzap3NDDDdCUZsjxk=", "article"=>{"title"=>"", 
"location"=>"", "excerpt"=>"", "body"=>"",  
"published_at(1i)"=>"2013", "published_at(2i)"=>"7", "published_at(3i)"=>"6",  
"published_at(4i)"=>"07", "published_at(5i)"=>"46"}, "commit"=>"Create Article"}
(0.1ms)  begin transaction
(0.1ms)  rollba