Ruby on Rails应用程序中的对象，生产失败

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我遇到了在生产中运行对象的问题。Ruby on Rails应用程序中的对象，生产失败

我跟着Railscast（修订版http://railscasts.com/episodes/153-pdfs-with-prawn-revised?view=asciicast）写了封信。它适用于我的开发环境（Mac OS X 10.9.1），但会导致独角兽在我的服务器上徘徊不前。我的生产服务器是（红帽=>红帽企业Linux服务器版本6.4（圣地亚哥））。我通过Gemfile安装了gem。

的Gemfile：

gem 'prawn' 
    gem 'prawn-qrcode'

控制器：（show行为）

def show 
     #@classroom = Classroom.find(params[:id]) 
     @classroom = find_classroom 

     @page_title = @classroom.location.name 
     @classroom_alt = @classroom.location.name + " - " + @classroom.room_number 
     @building = find_building(@classroom.location_id) 
     @owner = Owner.find(@classroom.owner_id) 
     @room_schedule_contact = RoomScheduleContact.find_by rmrecnbr:(@classroom.rmrecnbr) 
     @building_image = @building.picture.url(:medium).to_s 
     @building_sign_image = @building.building_sign.url(:thumb).to_s 
     @search = Classroom.search(params[:search]) 

     #@classroom_herprod = Building.find(params[:location_id]).building_short_code 
     respond_to do |format| 
     format.html # show.html.erb 
     format.png { render :qrcode => "http://rooms.lsa.umich.edu/classrooms/#{@classroom.facility_code_heprod}", :level => :l, :unit => 8 } 
     format.pdf do 
     pdf = ClassroomPdf.new(@classroom) 

      send_data pdf.render, type: "application/pdf", 
           disposition: "inline" 
     end 
     end 
    end

我有包含以下内容的classroom_pdf.rb文件中的PDF文件的目录。（这是从我所有的，但它是最基本的版本，在我的开发系统工作，并在生产失败）。

我运行以下

红宝石2.1.0p0（2013年12月25日修订44422）x86_64的Linux的] 宝石 '轨道'， '4.0.2'

的错误unicorn.stderr.log如下。

 E, [2014-02-07T12:39:20.400750 #7300] ERROR -- : reaped #<Process::Status: pid 7306 exit 1> worker=1 
    I, [2014-02-07T12:39:20.401257 #7300] INFO -- : worker=1 spawning... 
    I, [2014-02-07T12:39:20.463964 #7529] INFO -- : worker=1 spawned pid=7529 
    I, [2014-02-07T12:39:20.521524 #7529] INFO -- : Refreshing Gem list 
    E, [2014-02-07T12:39:29.938423 #7326] ERROR -- : uninitialized constant Prawn (NameError) 
     /var/www/rooms.lsa.umich.edu/html/iris/releases/20140207173433/app/pdfs/classroom_pdf.rb:1:in `<top (required)>' 
    /var/www/rooms.lsa.umich.edu/html/iris/shared/bundle/ruby/2.0.0/gems/railties-4.0.1/lib/rails/engine.rb:465:in `block (2 levels) in eager_load!'

这里是Gemfile中

source 'https://rubygems.org' 
    ##gem 'rails', '3.2.14' 
    gem 'rails', '4.0.2' 
    gem 'sqlite3' 
    gem 'sass-rails', '~> 4.0.0' 
    gem 'uglifier', '>= 1.3.0' 
    gem 'coffee-rails', '~> 4.0.0' 
    #gem 'jquery-rails' 

    gem 'turbolinks' 
    gem 'jbuilder', '~> 1.2' 
    group :doc do 
     # bundle exec rake doc:rails generates the API under doc/api. 
     gem 'sdoc', require: false 
    end 

    gem "haml" 
    #gem 'anjlab-bootstrap-rails', :require => 'bootstrap-rails' 
    gem 'bootstrap-sass', '~> 3.1.0' 

    #gem 'google-analytics-rails' 

    gem 'font-awesome-rails' 

    gem 'protected_attributes' 
    gem 'modernizr-rails' 
    gem "jquery-rails" 
    gem "devise", "3.0.3" 
    gem "cancan", ">= 1.6.9" 
    gem "rolify", ">= 3.2.0" 
    gem 'newrelic_rpm' 

    # QR-Code generation 
    gem 'rqrcode-rails3' 
    gem 'mini_magick' 

    gem 'prawn' 
    #gem 'prawn', '1.0.0.rc2' 
    gem 'prawn-qrcode' 
    #gem 'prawnto' 

    gem 'capistrano', '2.15.5' 
    #gem 'capistrano' 
    gem "simple_form" 
    gem 'will_paginate', '~> 3.0.5' 
    gem "therubyracer", :group => :assets, :platform => :ruby 
    gem 'will_paginate-bootstrap' 
    #gem 'kaminari' 

    ## Used for uploading and resizing images (Need both paperclip and mini_magick) 

    gem "paperclip", "3.5.1" 

    #gem "meta_search" 
    gem "ransack" 
    gem 'annotate', ">=2.6.0" 

    group :production do 
     gem 'unicorn' 
    end

任何想法？

来源

2014-02-07 humbledaisy

请显示您的gemfile吗？ – uday

你确定gem在prod服务器上正确安装吗？ –

当我导航到项目（当前版本）目录并检查Gemfile.lock大虾是否存在。我还能做另一张支票吗？ – humbledaisy

事实证明，我需要手动重新启动独角兽才能正确加载新的gem文件。

来源

2014-02-10 19:46:41 humbledaisy

Ruby on Rails应用程序中的对象，生产失败

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