Monday, May 21, 2012

Re: [Rails] Error : can't dup NilClass, in Heroku

Hi,
  This is:

" str , can't dup NilClass, ["C:/Ruby192/lib/ruby/1.9.1/date/format.rb:1031:in `dup'", "C:/Ruby192/lib/ruby/1.9.1/date/format.rb:1031:in `_parse'", "C:/Ruby192/lib/ruby/1.9.1/time.rb:261:in `parse'", "g.rb:29:in `dateTimeFromString'", "g.rb:40:in `initialize'", "g.rb:45:in `new'", "g.rb:45:in `<main>'"]"

   I reproduced the error and I detected that when the parameter that was sent to the function is nil. But I keep trying because the field is database and should not be null according to business rules.

   I was confused because I found forums where suggested using the statement ' unloadable ' but was inconclusive.
    If you have another point of view will be welcome,
    thanks

2012/5/21 Jeremy Walker <jez.walker@gmail.com>


On 21 May 2012, at 17:07, johan rincon <nahoj28nahoj28@gmail.com> wrote:

 Hi,
    The application is deployed on Heroku, is based on Ruby 3.2.1 and Rails 1.9.2. Sometimes a function of my props starts throwing this error  " StringUtils:dateTimeFromString, str , can't dup NilClass"  and I don't understand the cause. it's my function:

 require 'time'
module StringUtils
  DATE_FORMAT_YYYY_MM_DD='%Y-%m-%d'
  DATE_FORMAT_HH_MM_SS='%H:%M:%S'
  DATE_FORMAT_YYYY_MM_DD_HH_MM_SS='%Y-%m-%d %H:%M:%S'
  DATE_FORMAT_YYYY_MM_DD_T_HH_MM_SS='%Y-%m-%dT%H:%M:%S'
  DATE_FORMAT_YYYYMMDDHHMMSS='%Y%m%d%H%M%S'
  DATE_FORMAT_DAY_OF_WEEK="%A"

 
  def stringFormatDate(strDate,format)
    if strDate!=nil
      begin
        return Time.parse(strDate).strftime(format)
      rescue
        Rails.logger.error("StringUtils:stringFormatDate, str #{strDate}, #{$!}")
      end
    end
    return strDate 
  end
 
  def dateTimeFromString(strDate)
    begin
      return Time.parse(strDate)
    rescue
       Rails.logger.error("StringUtils:dateTimeFromString, str #{strDate}, #{$!}")
       return nil
    end
  end
end

Can you provide a stack trace from your logs please. 



I hope your comments, Thanks



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Johan Rincón
Ing. en Informática
UNET



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