NameError：未初始化的常量 GemName::Rails::Railtie答案

【问题标题】：NameError: uninitialized constant GemName::Rails::RailtieNameError：未初始化的常量 GemName::Rails::Railtie
【发布时间】：2016-04-19 11:19:11
【问题描述】：

我正在创建一个 gem 来封装应用程序的一大块功能。他们 gem 本质上是运行一个 rake 任务，但是当我使用 bundle exec rake:assets:precompile 运行任务时，我收到以下错误

rake aborted!
Bundler::GemRequireError: There was an error while trying to load the gem 'gem-name'.
/Users/tonyedwardspz/myprojects/westcornwallevents/config/application.rb:8:in `<top (required)>'
/Users/tonyedwardspz/myprojects/westcornwallevents/Rakefile:4:in `require'
/Users/tonyedwardspz/myprojects/westcornwallevents/Rakefile:4:in `<top (required)>'
NameError: uninitialized constant GemName::Rails::Railtie
/Users/tonyedwardspz/myprojects/westcornwallevents/config/application.rb:8:in `<top (required)>'
/Users/tonyedwardspz/myprojects/westcornwallevents/Rakefile:4:in `require'
/Users/tonyedwardspz/myprojects/westcornwallevents/Rakefile:4:in `<top (required)>'

railtie相关模块代码为：

require 'rails'

module GemName
  module Rails
    class Railtie < Rails::Railtie
      railtie_name :gem_name

      rake_tasks do
        load "tasks/gem_name.rake"
      end
    end
  end
end

知道为什么我会收到此错误吗？

【问题讨论】：

标签： ruby-on-rails railtie

【解决方案1】：

错误出现在类定义的语法中。如下更新代码将允许 rake 任务运行。

class Railtie < Rails::Railtie

到

class Railtie < ::Rails::Railtie

【讨论】：