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Cean Ooi

2008-May-27 08:59 UTC

Nil Object

well, im tryin to read an email, which already is a txt file in my
folder, which name is ForActionMailer, but when i run the command it
shows this error




C:\rubydev\prac1\mail5>ruby script/runner
EventMailer.receive(STDIN.read) < ForA
ctionMailer.txt
c:/ruby/lib/ruby/gems/1.8/gems/rails-2.0.2/lib/commands/runner.rb:47:
C:/rubydev
/prac1/mail5/app/models/event_mailer.rb:16:in `receive'': You have a nil
object w
hen you didn''t expect it! (NoMethodError)
The error occurred while evaluating nil.attachments     from
C:/rubydev/prac1/ma
il5/app/models/event_mailer.rb:15:in `each''
        from C:/rubydev/prac1/mail5/app/models/event_mailer.rb:15:in
`receive''
        from
c:/ruby/lib/ruby/gems/1.8/gems/actionmailer-2.0.2/lib/action_mailer
/base.rb:373:in `receive''
        from (eval):1
        from
c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `ev
al''
        from
c:/ruby/lib/ruby/gems/1.8/gems/rails-2.0.2/lib/commands/runner.rb:4
7
        from
c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `ge
m_original_require''
        from
c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `re
quire''
        from script/runner:3


require ''rubygems''
require ''action_mailer''


This is my Action mailer code:

class EventMailer < ActionMailer::Base

    def receive(email)
      page = Page.find_by_address(email.to.first)
      page.emails.create(
        :subject => email.subject,
        :body => email.body
      )

      if email.has_attachments?
        for attachment in email.attachments
          page.attachments.create({
            :file => attachment,
            :description => email.subject
          })
        end
      end
    end


  end

and i have this is my migrate folder

class CreateEmails < ActiveRecord::Migration
  def self.up
    create_table :emails do |t|
      t.integer :page_id
      t.string :subject
      t.string :body

      t.timestamps
    end
  end

  def self.down
    drop_table :emails
  end
end




---------------------------------------------------

THIS is the content i wanna read. its the foractionmailer txt file


FFrom aaa  Fri May 23 16:36:41 2008
Delivered-To: yyy-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
Received: from gmail-pop.l.google.com [111.11.11.111]
  by xxx.com with POP3 (fetchmail-6.3.8)
  for <aaa@localhost> (single-drop); Fri, 23 May 2008 16:36:41 +0800
(MPST)
Received: by 11.111.111.11with SMTP id u16cs17333ebc;
        Tue, 20 May 2008 23:42:23 -0700 (PDT)
Received: by 11.111.11.11 with SMTP id 2123p.1123123.1211231233039;
        Tue, 20 May 2008 23:42:23 -0700 (PDT)
Received: from blu0-omc2-s19.blu0.hotmail.com
(blu0-omc2-s19.blu0.hotmail.com [11.111.11.11])
        by mx.google.com with ESMTP id h4432 fh.30.2008.05.20.23.42.22;
        Tue, 20 May 2008 23:42:23 -0700 (PDT)
Received-SPF: pass (google.com: domain of
xxx-PkbjNfxxIARBDgjK7y7TUQ@public.gmane.org designates
65.55.111.94 as permitted sender) client-ip=65.55.111.94;
Authentication-Results: mx.google.com; spf=pass (google.com: domain of
xxx-PkbjNfxxIARBDgjK7y7TUQ@public.gmane.org designates 11.11.111.11 as permitted
sender)
smtp.mail=xxx-PkbjNfxxIARBDgjK7y7TUQ@public.gmane.org
Received: from Bewr46-W231 ([11.11.111.11]) by
blu0-omc2-s19.blu0.hotmail.com with Microsoft SMTPSVC(6.0.3790.3959);
   Tue, 20 May 2008 23:42:22 -0700
Message-ID: <B345D46-W234FERT365B41456ERT0-MsuGFMq8XAE@public.gmane.org>
Return-Path: xxx-PkbjNfxxIARBDgjK7y7TUQ@public.gmane.org
Content-Type: multipart/alternative;
  boundary="_d1512362-2905-4b45-8a7d-183ee6f27167_"
X-Originating-IP: [147.243.216.4]
From: xxx xxx <xxx-PkbjNfxxIARBDgjK7y7TUQ@public.gmane.org>
To: <yyy-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Subject: blablabla
Date: Wed, 21 May 2008 02:42:22 -0400
Importance: Normal
MIME-Version: 1.0
X-OriginalArrivalTime: 21 May 2008 06:42:22.0200 (UTC)
FILETIME=[D294DF80:01C8BB0D]

--_d1512362-2905-4b45-8a7d-183ee6f27167_
Content-Type: text/plain; charset="Windows-1252"
Content-Transfer-Encoding: quoted-printable


asas

=20

_________________________________________________________________
Make every e-mail and IM count. Join the i=92m Initiative from
Microsoft.
http://im.live.com/Messenger/IM/Join/Default.aspx?source=3DEML_WL_
MakeCount
--_d1512362-2905-4b45-8a7d-183ee6f27167_
Content-Type: text/html; charset="Windows-1252"
Content-Transfer-Encoding: quoted-printable

<html>
<head>
<style>
.hmmessage P
{
margin:0px;
padding:0px
}
body.hmmessage
{
FONT-SIZE: 10pt;
FONT-FAMILY:Tahoma
}
</style>
</head>
<body class=3D''hmmessage''>
asas<BR><BR>
<DIV>
&nbsp;<BR>
<IMG alt=3D"Image by FlamingText.com"
src=3D"http://hmail.flamingtext.com/hmail/2003/05/16/flamingtext_com_1053058861_7286.jpg"
border=3D0><BR></DIV><br /><hr />Make every e-mail
and IM count. <a
href=3D''http://im.live.com/Messenger/IM/Join/Default.aspx?source=3DEML_WL_
MakeCount''
target=3D''_new''>Join the i=92m Initiative from
Microsoft.</a></body>
</html>
--_d1512362-2905-4b45-8a7d-183ee6f27167_--


can some one pls help me~~~
sry for any problems or inconvinient
thx~~

cheers~~~
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Frederick Cheung

2008-May-27 09:27 UTC

head link

Re: Nil Object

On 27 May 2008, at 09:59, Cean Ooi wrote:
>
> well, im tryin to read an email, which already is a txt file in my
> folder, which name is ForActionMailer, but when i run the command it
> shows this error
Walk through the code with the debugger and work out which object is  
nil (and why).

Fred

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Cean Ooi

2008-May-27 11:55 UTC

head link

Re: Nil Object

fred pls help me as im really new to ruby... but need to rush some 
project i cant really adopt ruby yet...
-- 
Posted via http://www.ruby-forum.com/.

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Frederick Cheung

2008-May-27 12:06 UTC

head link

Re: Nil Object

On 27 May 2008, at 12:55, Cean Ooi wrote:
>
> fred pls help me as im really new to ruby... but need to rush some
> project i cant really adopt ruby yet...
I can''t do your work for you :-) stick some puts statements in there  
so that you can see at each step whether variables have the expected  
values. Eg is page non-nil ?

Fred>
> -- 
> Posted via http://www.ruby-forum.com/.
>
> >

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Emmie Wawa

2008-May-28 04:09 UTC

head link

Nil Object

Hi everyone I''m new to ROR. I am receiving email using ActionMailer. I
need some help about the error nil object i got. Anyway i am doing rails
on window platform.

At first I generate the code
ruby script/generate migration CreateTables to generate the file below.

db/migrate/001_create_tables.rb:
class CreateTables < ActiveRecord::Migration
  def self.up
    create_table(:pages) do |t|
      t.column :address, :string
    end
    create_table(:emails) do |t|
      t.column :page_id, :integer
      t.column :subject, :string
      t.column :body, :string
    end
    create_table(:attachments) do |t|
      t.column :page_id, :integer
      t.column :file, :binary
      t.column :description, :string
    end
  end

  def self.down
    drop_table :attachments
    drop_table :emails
    drop_table :pages
  end
end

Then in model i got a EventMailer:

class EventMailer < ActionMailer::Base
def receive(email)
      page = page.find_by_address(email.to.first)
      page.emails.create(
        :subject => email.subject,
        :body => email.body
      )

      if email.has_attachments?
        for attachment in email.attachments
          page.attachments.create({
            :file => attachment,
            :description => email.subject
          })
        end
      end


end

end

Then i do these
ruby script/generate model Page
ruby script/generate model Email
ruby script/generate model Attachment

After that i rake db:migrate

Then i got a page.rb in the model:
class Page < ActiveRecord::Base
  has_many :emails
  has_many :attachments
end

When i run ruby script/runner EventMailer.receive(STDIN.read) <
ForActionMailer.txt

*Note: ForActionMailer.txt is a text file contains the email i fetched
from gmail by using fetch_mail.

But i got an nil object error.

Please help. Thanks

Wawa
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Rails - May 2008 - Nil Object

Nil Object

Re: Nil Object

Re: Nil Object

Re: Nil Object

Nil Object