ruby-on-rails - 加载错误 : cannot load such file -- roo

Question

在过去的 2.5 天里，我一直在解决我的 Ruby on Rails 应用程序中的问题。在网上和这里使用了 stackoverflow 上的资源后，我取得了进展，但仍未解决问题。

困境:我无法将 roo gem 或电子表格 gem 加载到我的 Rails 应用程序中。

我已经成功地使用 IRB 终端的电子表格 gem 来执行一个简单的脚本，并将从电子表格读取的数据输出到终端。这表明 gem 已正确安装并正常运行。

不过，Rails 似乎并不想识别这两个 gem 。这是在多次尝试正确配置依赖项和开发依赖项的版本之后出现的。

我的欢迎 Controller :

class WelcomeController < ApplicationController
    require 'roo'

    def index
        puts "Hello Rails!"
    end
end

我的 Gemfile:

source 'https://rubygems.org'

git_source(:github) do |repo_name|
  repo_name = "#{repo_name}/#{repo_name}" unless repo_name.include?("/")
  "https://github.com/#{repo_name}.git"
end


# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '~> 4.2.8'
# Use sqlite3 as the database for Active Record
gem 'sqlite3'
# Use Puma as the app server
gem 'puma', '~> 3.0'
# Use SCSS for stylesheets
gem 'sass-rails', '~> 5.0'
# Use Uglifier as compressor for JavaScript assets
gem 'uglifier', '>= 1.3.0'
# Use CoffeeScript for .coffee assets and views
gem 'coffee-rails', '~> 4.2'
# See https://github.com/rails/execjs#readme for more supported runtimes
# gem 'therubyracer', platforms: :ruby

# Use jquery as the JavaScript library
gem 'jquery-rails'
# Turbolinks makes navigating your web application faster. Read more: https://github.com/turbolinks/turbolinks
gem 'turbolinks', '~> 5'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.5'
# Use Redis adapter to run Action Cable in production
# gem 'redis', '~> 3.0'
# Use ActiveModel has_secure_password
# gem 'bcrypt', '~> 3.1.7'

# Use Capistrano for deployment
# gem 'capistrano-rails', group: :development

group :development, :test do
  # Call 'byebug' anywhere in the code to stop execution and get a     debugger console
  gem 'byebug', platform: :mri
end

group :development do
  # Access an IRB console on exception pages or by using <%= console %>     anywhere in the code.
  gem 'web-console', '>= 3.3.0'
  gem 'listen', '~> 3.0.5'
  # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
  gem 'spring'
  gem 'spring-watcher-listen', '~> 2.0.0'
end

# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]

gem 'minitest', '~> 5.4'

gem 'rack', '~> 1.6'

gem 'nokogiri'

gem 'ruby-ole'

gem 'hoe', '~> 3.14'

gem 'rdoc', '~> 4.0'

gem 'roo', '2.7.0'

gem 'spreadsheet', '1.1.0'

我的 roo.gemspec 文件:

# encoding: utf-8
lib = File.expand_path('../lib', __FILE__)
$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
require 'roo/version'

Gem::Specification.new do |spec|
  spec.name          = 'roo'
  spec.version       = Roo::VERSION
  spec.authors       = ['Thomas Preymesser', 'Hugh McGowan', 'Ben Woosley', 'Oleksandr Simonov', 'Steven Daniels']
  spec.email         = ['ruby.ruby.ruby.roo@gmail.com', 'oleksandr@simonov.me']
  spec.summary       = 'Roo can access the contents of various spreadsheet files.'
  spec.description   = "Roo can access the contents of various spreadsheet files. It can handle\n* OpenOffice\n* Excelx\n* LibreOffice\n* CSV"
  spec.homepage      = 'http://github.com/roo-rb/roo'
  spec.license       = 'MIT'

  spec.files         = `git ls-files -z`.split("\x0")
  spec.files.reject! { |fn| fn.include?('test/files') }
  spec.require_paths = ['lib']

  spec.add_dependency 'nokogiri', '~> 1'
  spec.add_dependency 'rubyzip', '~> 1.1', '< 2.0.0'

  spec.add_development_dependency 'rake', '~> 10.1'
  spec.add_development_dependency 'minitest', '~> 5.4', '>= 5.4.3'
  spec.add_development_dependency 'rack', '~> 1.6', '< 2.0.0'
end

我尝试编辑文件以更改 spec.require_paths 变量，如下所示:

spec.require_paths = ['lib/roo']

但是我运行后没有成功

>> bundle update
>> bundle install

我的 roo gem 之路:

/var/lib/gems/2.3.0/gems/roo-2.7.0/

我正在运行 LXLE Linux，Lubuntu 的衍生产品。

我已尝试在这些问题中找到解决方案，但似乎对我没有任何帮助:

Ruby roo LoadError: cannot load such file -- spreadsheet/note

cannot load such file -- sqlite3/sqlite3_native (LoadError) on ruby on rails

看来我已经根据 ruby​​gems.org 上的文档正确设置了依赖项。

有人遇到过这样的问题吗？过去几天我一直在研究这个问题，所以也许我在掩盖一些重要的事情，所以我认为把它写下来并询问它会有所帮助。我今天会再花几个小时研究它。

Answer 1

您可以检查两件事:

• gemset:确保 gem 安装在与您所在的同一 gemset 中
• ruby 版本:确保安装的 gem 与您使用的 ruby​​ 版本相同。

要检查，请从您的项目目录执行“gem list”并查看是否列出了 gem。

如果不在同一个gemset中，你可以使用:

rvm use gemset_name 

如果不是同一个ruby版本，设置为使用ruby版本，例如2.3.3

rvm use 2.3.3