ruby-on-rails - 是什么导致此无效日期错误？

Question

在这行代码中:

@note.date = Date.strptime(params[:custom_date], '%d-%m-%Y') unless params[:custom_date].blank?

我收到这个错误:

ArgumentError: invalid date
/usr/ruby1.9.2/lib/ruby/1.9.1/date.rb:1022

参数如下:

{
  "commit"             => "Create",
  "utf8"               => "\342\234\223",
  "authenticity_token" => "RKYZNmRaElg/hT5tlmLcqnstnOapdhiaWmDcjNDtSOI=",
  "action"             => "create",
  "note"               => { "name"=>"note1", "detail"=>"detail" },
  "controller"         => "notes",
  "custom_date"        => "03-03-2010"
}

是什么导致了这个错误？感谢阅读。

Answer 1

你得到的参数是

{"commit"=>"Create",
 "utf8"=>"\342\234\223",
 "authenticity_token"=>"RKYZNmRaElg/hT5tlmLcqnstnOapdhiaWmDcjNDtSOI=",
 "action"=>"create",
 "note"=>
  {"name"=>"note1",
   "detail"=>"detail"},
 "controller"=>"notes",
 "custom_date"=>"03-03-2010"}

因此我们可以清楚地看出

它不是 params[:custom_date] 但它是 params['custom_date']

更新

Date.strptime 方法遵循特定的模式。例如

str = "01-12-2010" #DD-MM-YYYY
then use
Date.strptime(str,"%d-%m-%Y")

但是如果

str = "2010-12-01" #YYYY-MM-DD
then use
Date.strptime(str,"%Y-%m-%d")