I'm trying to move a current working task (in production and in the console) to use delayed_job in a Rails 2 app but keep getting the error:
ThermalImageJob failed with NameError: uninitialized constant Barby::Code128B
I've pored through others' code searching for an answer to no avail. Here's my code:
/lib/thermal_image_job.rb
class ThermalImageJob < Struct.new(:order_id)
def perform
order = Order.find(order_id)
order.tickets.each do |ticket|
ticket.barcodes.each do |barcode|
barcode.generate_thermal_image
end
end
end
end
/app/controllers/orders_controller.rb
Delayed::Job.enqueue(ThermalImageJob.new(#order.id))
/app/models/barcode.rb
def generate_thermal_image(format=:gif)
filename = "#{barcode}_thermal.#{format}"
temp_file_path = File.join("#{RAILS_ROOT}", 'tmp', filename)
unless FileTest.exists?(temp_file_path)
barcode_file = File.new(temp_file_path, 'w')
code = Barby::Code128B.new(barcode)
....
end
Gemfile
gem "delayed_job", "2.0.7"
gem "daemons", "1.0.10"
Well, after much head banging, I figured it out, so I'm posting this to help the next person. The problem was that it couldn't find the barby libs, so I added a require at the beginning of my class:
require "barby/outputter/rmagick_outputter"
require "barby/barcode/code_128"
Related
I am using gem differ https://github.com/pvande/differ
I have a helper
require 'differ'
module AnswersHelper
def self.getDiff (text1, text2)
Differ.format = :html
diff = Differ.diff_by_word(#current, #original)
end
end
But I get an error No such file to load -- differ
If I remove require line
I get an error at that line
Differ.format = :html
uninitialized constant QuestionsController::Differ
When I tried following commands in rails console it worked
require 'differ'
diff = Differ.diff_by_word("text1","text2)
I have gem differ in my gemfile
and also I tried
require_relative 'differ'
and
require './differ'
UPD: seems restarting server helps, I'll check it right now
Restarting server helped........
I am trying to unzip a file in my Spree plugin.
Defined the unzipping method in a module which looks like this.
module ImportImages
class Zipper
def self.unzip(zip, unzip_dir, remove_after = false)
Zip::File.open(zip) do |zip_file|
zip_file.each do |f|
f_path=File.join(unzip_dir, f.name)
FileUtils.mkdir_p(File.dirname(f_path))
zip_file.extract(f, f_path) unless File.exist?(f_path)
end
end
FileUtils.rm(zip) if remove_after
end
end
end
I have included the rubyzip gem in my Gemfile.
gem 'rubyzip'
gem 'zip-zip'
When trying to run it, I am getting the following error.
NameError - uninitialized constant ImportImages::Zipper::Zip:
I have tried every solution provided in stackoverflow and other sites. I tried downgrading the version of rubyzip which is 1.2.0 now and add require 'zip' or require 'zip/zip'. Both returned load error.
I have try adding require 'zip/filesystem' to the class. But got
LoadError - cannot load such file -- zip/zipfilesystem
Any solution for this?
Include rubyzip in gem file in this way:
gem 'rubyzip', require: 'zip'
See this question
It's looking for a nested Constant. Change line Zip::File.open(zip) do |zip_file| with below:
::Zip::File.open(zip) do |zip_file|
It should work.
Also make sure you require rubygem/bundle setup. Though in spree it should've already been done.
Babar's answer is correct, but you also need to add require 'zip' in application_controller.rb
I want to add original rake task to my rails app by making gem. But, I couldn't.
Please tell me my mistake.
In my gem file
>lib/gem_test.rb
require "gem_test/version"
require 'gem_test/railtie' if defined?(Rails) && Rails.version >= "3"
module GemTest
#this is dummy method for loading check
def self.hogehoge
"hogehoge"
end
end
>lib/gem_test/railtie.rb
module GemTest
class Railtie < Rails::Railtie
rake_tasks do
load "tasks/gem_test.rake"
end
end
end
>lib/tasks/gem_test.rake
namespace :fugafuga do
desc "fugafuga"
task :piyopiyo do
puts "piyopoyo"
end
end
and, Gemfile in my rails app,gem gem_test, git:mygitrepository. But I don't find fugafuga:piyopiyotask in result of rake -T.
If need more infomation, see my repository
I think you must require rake in your rakefile:
namespace :fugafuga do
require 'rake' <----
desc "fugafuga"
task :piyopiyo do
puts "piyopoyo"
end
end
I wanted to preload the configuration (from ".yml" files). In one of my initializer files (config/initializers/facebook.rb) I have following line of code:
FACEBOOK_CONFIG = YAML.load_file("#{Rails.root}/config/facebook.yml")[Rails.env]
So, it works like a charm in the "DEVELOPMENT" mode. Once I switch to the production mode, it keeps telling me, that FACEBOOK_CONFIG is an uninitialized constant for my "facebook.js.coffee.erb" file, located in assets/javascript (If it matters), if I want to o "rake assets:precompile". I've tried doing random stuff, like: RAILS_ENV=production bundle exec rake assets:precompile or
rake assets:precompile:all
, but no luck
I have tried assigning "initialize_on_precompile = true" variable for my production environment (although, it should be true by default), just in case.
Why it doesn't work in production mode (But, I want to emphasise, that it does work(!) in the development environment).
Can someone help with that one ?
I encountered exactly the same problem. This is because your javascript(coffescript) file makes reference to a constant that is defined in an initializer. Because it is precompiled before the initializer the app throws an error.
This is the simple solution I found. You place this code at the bottom of your application.rb file in config:
module AssetsInitializers
class Railtie < Rails::Railtie
initializer "assets_initializers.initialize_rails",
:group => :assets do |app|
require "#{Rails.root}/config/initializers/facebook.rb"
end
end
end
It manually loads up certain files from the initializer folder. It solved my problem.
Hopefully this was the issue for you as well.
module Rails
class << self
def facebook_config
##facebook_config ||= nil
end
def facebook_config=(facebook_config)
##facebook_config = facebook_config
end
end
end
Rails.facebook_config = YAML.load_file("#{Rails.root}/config/facebook.yml")[Rails.env]
# And you can use it like this in anywhere:
puts Rails.facebook_config
I'm using the following code to scrape an eBay listing using the scrAPI gem:
I installed this by executing:
gem install scrapi
I'm also overriding its default text parser by declaring:
Scraper::Base.parser :html_parser
The problem is that I keep receiving the following error on the auctions array size. Not sure what I'm doing wrong? Both size and length don't work.
Scraper.rb:31:in `<class:ScraperDemo>': undefined method `size' for nil:NilClass (No
MethodError)Scraper.rb:10:in `<main>'
I just run via the commandline:
ruby Scraper.rb
Code:
#!/usr/bin/env ruby
require 'open-uri'
require 'httparty'
require 'json'
require 'scrapi'
Scraper::Base.parser :html_parser
class ScraperDemo
ebay_auction = Scraper.define do
process "h3.ens>a", :description=>:text, :url=>"#href"
process "td.ebcPr>span", :price=>:text
process "div.ebPicture >a>img", :image=>"#src"
result :description, :url, :price, :image
end
ebay = Scraper.define do
array :auctions
process "table.ebItemlist tr.single", :auctions=>ebay_auction
result :auctions
end
auctions = ebay.scrape(URI.parse('http://search.ebay.com/ipod-nano_W0QQcatrefZC6QQfromZR3QQfsooZ1QQfsopZ1QQkeywordZonQQsacatZQ2d1QQstrkwZipod'))
# No. of channels found
puts auctions.size # error occurs on this line number
# First auction:
auction = auctions[0]
puts auction.description
puts auction.url
end
I ended up using Nokogiri as my scraper of choice.