Nil Object

Rails
1

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