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johan rincon

2012-May-21 16:07 UTC

Error : can''t dup NilClass, in Heroku

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


I hope your comments, Thanks

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Jeremy Walker

2012-May-21 22:34 UTC

head link

Re: Error : can''t dup NilClass, in Heroku

On 21 May 2012, at 17:07, johan rincon
<nahoj28nahoj28-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> 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 rincon

2012-May-21 22:47 UTC

head link

Re: 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-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
>
>
> On 21 May 2012, at 17:07, johan rincon
<nahoj28nahoj28-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> 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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> "Ruby on Rails: Talk" group.
> To post to this group, send email to
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>
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>
>  --
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>
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> For more options, visit this group at
> http://groups.google.com/group/rubyonrails-talk?hl=en.
>


-- 
Johan Rincón
Ing. en Informática
UNET

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