ruby-on-rails-4 - Rails:NameError:未初始化的常量Article::ImageUploader在Rails 4.1.5上使用Carrierwave时

Question

我正在学习Rails 4.1.5

我收到此错误:

2.1.1 :008 > Article
NameError: uninitialized constant Article::ImageUploader
    from /Volumes/disk0s4/www/rails/blog/app/models/article.rb:4:in `<class:Article>'
    from /Volumes/disk0s4/www/rails/blog/app/models/article.rb:1:in `<top (required)>'
    from (irb):8
    from /Users/didin/.rvm/gems/ruby-2.1.1/gems/railties-4.1.5/lib/rails/commands/console.rb:90:in `start'
    from /Users/didin/.rvm/gems/ruby-2.1.1/gems/railties-4.1.5/lib/rails/commands/console.rb:9:in `start'
    from /Users/didin/.rvm/gems/ruby-2.1.1/gems/railties-4.1.5/lib/rails/commands/commands_tasks.rb:69:in `console'
    from /Users/didin/.rvm/gems/ruby-2.1.1/gems/railties-4.1.5/lib/rails/commands/commands_tasks.rb:40:in `run_command!'
    from /Users/didin/.rvm/gems/ruby-2.1.1/gems/railties-4.1.5/lib/rails/commands.rb:17:in `<top (required)>'
    from /Volumes/disk0s4/www/rails/blog/bin/rails:8:in `<top (required)>'
    from /Users/didin/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /Users/didin/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from -e:1:in `<main>'

我的文件:article.rb

class Article < ActiveRecord::Base    
    validates_presence_of :title, :body
    belongs_to :user
    mount_uploader :image, ImageUploader
end

运行 rails console时出现错误

当我在控制台上写一个单词“ Article ”时，它会在上面引发错误，但是当删除article.rb文件中的这一行 mount_uploader :image, ImageUploader时，它可以正常工作。

恢复该行后，错误再次出现。因此看来错误是由那条线引起的，但我不确定。

任何人都可以解决此问题，请...

谢谢您的阅读和回答:-)

Answer 1

我知道这已经晚了几个月，但是我自己偶然发现了这个问题。我的解决方案是粘贴

require 'carrierwave/orm/activerecord'

进入config / environment.rb文件。只需将其附加在末尾即可。

我的环境:
Ruby 2.1.2p95;
Rails 4.1.7;
载波-0.10.0