I have a written a simple RoR program that accepts a plaintext upload
from a
user and then emails that file capitalized to an email address aquired
through a form. I am trying to utilize ActiveRecord to create a list of
past
upload , but I receive a NoMethodError whenever I try to save my model.
The
error follows:
NoMethodError in UploadController#upload
You have a nil object when you didn’t expect it!
You might have expected an instance of Array.
The error occurred while evaluating nil.delete
RAILS_ROOT: C:/RailsApps/SpecEd1
Application Trace:
c:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.1.0/lib/active_record/transactions.rb:124:in
rollback_active_record_state!' c:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.1.0/lib/active_record/transactions.rb:110:in save!’
app/controllers/upload_controller.rb:18:in `upload’
Request
Parameters:
{“Upload”=>“Upload,
Capitalize,
and Email”,
“emailaddress”=>“[email protected]”,
“datafile”=>#ActionController::UploadedStringIO:0x3442a34}
Response
Headers:
{“cookie”=>[],
“Cache-Control”=>“no-cache”}
And here is my Model:
require ‘net/smtp’
class DataFile < ActiveRecord::Base
def initialize(incoming_file)
@file_name = incoming_file.original_filename
@content_type = incoming_file.content_type
@file = incoming_file
end
def uploaded_file=(incoming_file)
@file_name = incoming_file.original_filename
@content_type = incoming_file.content_type
@file = incoming_file
end
def file_name=(new_file_name)
write_attribute(“file_name”, sanitize_filename(new_file_name))
end
def save_file
File.open(“#{RAILS_ROOT}/public/uploaded/#{@file_name}”, “wb”) do
|f|
f.write(@file.read)
end
end
def email(address, time)
filedata = “”
File.open(“#{RAILS_ROOT}/public/uploaded/#{@file_name}”, “r”) do
|f|
if @content_type === ‘text/plain’
lines = f.readlines
Net::SMTP.start(‘smtp.psu.edu’, 25, ‘arl.psu.edu’,
‘zkg5001’,
‘4b4eebhjkasdfyu’, :plain) do |smtp|
smtp.send_message(generate_email(lines, time),
‘[email protected]’, address)
end
else
Net::SMTP.start(‘smtp.psu.edu’, 25, ‘arl.psu.edu’,
‘zkg5001’,
‘4b4eebhjkasdfyu’, :plain) do |smtp|
smtp.send_message(“file was not plaintext”,
‘[email protected]’, address)
end
end
end
end
def to_s
“File-- name:#{@file_name} type:#{@content_type}”
end
private
def sanitize_filename(file_name)
just_filename = File.basename(file_name)
just_filename.gsub(/[^\w.-]/,‘_’)
end
def generate_email(lines, time)
email = “Time of fileprocess is: File processed at:
#{time.hour}:#{time.min}:#{time.sec}
#{time.mon}/#{time.mday}/#{time.year}\n\n”
email << lines.join(‘\n’).upcase
File.open(“C:\myLog.txt”, “w”) do |f|
f.puts(email)
end
return email
end
end
And its migration:
class DataFiles < ActiveRecord::Migration
def self.up
create_table :data_files do |t|
t.column :file_name, :string
t.column :content_type, :string
t.column :file, :text
end
end
def self.down
drop_table :data_files
end
end
and the controller:
require ‘date’
class UploadController < ApplicationController
protect_from_forgery :only => [:create, :update, :destroy]
def index
render :file => ‘app\views\upload\index.html.erb’
end
def upload
@myData = DataFile.new(params[‘datafile’])
File.open(“C:/myLog.txt”, “w”) do |f|
f.puts @myData
end
#@myData.uploaded_file = params['datafile']
@myData.save_file
@myData.save!
timeOfUpload = DateTime.now
if(/^[A-Z0-9._%±]+@[A-Z0-9.-]+.[A-Z]{2,4}$/i.match(params[‘emailaddress’]))
@myData.email(params[‘emailaddress’], timeOfUpload)
redirect_to :action => ‘index’
else
redirect_to :action => ‘invalid_email’
end
end
def invalid_email
render :file => ‘app/views/upload/invalid_email.html.erb’
end
def history
render :file =>‘app/views/upload/history.html.erb’
end
end
I don’t know why the exception is being thrown or how to fix it. Any
assistance would be much appreciated
–
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