Ruby on rails 无法要求将gems作为add\u development\u依赖项加载

在mygem.gemspec中，我有以下gem，我只想用于调试我的ruby gem-

Gem::Specification.new do |s|
  ...
  s.add_development_dependency "pry"
  ...
end

然后在我的Rails生成器文件中，我有

require“pry”

，但是我得到了以下错误-

.rvm/gems/ruby-2.3.3/gems/activesupport-5.1.6/lib/active_support/dependencies.rb:292:in `require': cannot load such file -- pry (LoadError)

如果我将

add_development_dependency

更改为

add_dependency

，它会工作。我做错什么了吗

编辑：

lib/generators/mygem/install_generator.rb

需要“撬动”
模块MyGem
模块生成器
类InstallGenerator

全堆栈跟踪

$rails g mygem:安装
通过过程99478中的弹簧预紧器运行
.rvm/gems/ruby-2.3.3/gems/activesupport-5.1.6/lib/active\u support/dependencies.rb:292:在“require”中：无法加载这样的文件--pry（LoadError）
from.rvm/gems/ruby-2.3.3/gems/activesupport-5.1.6/lib/active\u support/dependencies.rb:292:in'block in require'
from.rvm/gems/ruby-2.3.3/gems/activesupport-5.1.6/lib/active\u support/dependencies.rb:258:in'load\u dependency'
from.rvm/gems/ruby-2.3.3/gems/activesupport-5.1.6/lib/active\u support/dependencies.rb:292:in'require'
从Projects/mygem/gem/mygem/lib/generators/cast/install_generator.rb:1:in`'
from.rvm/gems/ruby-2.3.3/gems/activesupport-5.1.6/lib/active\u support/dependencies.rb:292:in'require'
from.rvm/gems/ruby-2.3.3/gems/activesupport-5.1.6/lib/active\u support/dependencies.rb:292:in'block in require'
from.rvm/gems/ruby-2.3.3/gems/activesupport-5.1.6/lib/active\u support/dependencies.rb:258:in'load\u dependency'
from.rvm/gems/ruby-2.3.3/gems/activesupport-5.1.6/lib/active\u support/dependencies.rb:292:in'require'
from.rvm/gems/ruby-2.3.3/gems/railties-5.1.6/lib/rails/command/behavior.rb:82:在“查找中的块（2个级别）”中
from.rvm/gems/ruby-2.3.3/gems/railties-5.1.6/lib/rails/command/behavior.rb:78:in'each'
from.rvm/gems/ruby-2.3.3/gems/railties-5.1.6/lib/rails/command/behavior.rb:78:“查找中的块”中
from.rvm/gems/ruby-2.3.3/gems/railties-5.1.6/lib/rails/command/behavior.rb:77:in'each'
from.rvm/gems/ruby-2.3.3/gems/railties-5.1.6/lib/rails/command/behavior.rb:77:in'lookup'
from.rvm/gems/ruby-2.3.3/gems/railties-5.1.6/lib/rails/generators.rb:250:“按名称空间查找”
from.rvm/gems/ruby-2.3.3/gems/railties-5.1.6/lib/rails/generators.rb:267:in'invoke'
from.rvm/gems/ruby-2.3.3/gems/railties-5.1.6/lib/rails/commands/generate/generate_command.rb:24:in'perform'
from.rvm/gems/ruby-2.3.3/gems/thor-0.20.0/lib/thor/command.rb:27:in'run'
from.rvm/gems/ruby-2.3.3/gems/thor-0.20.0/lib/thor/invocation.rb:126:in“invoke_命令”
from.rvm/gems/ruby-2.3.3/gems/thor-0.20.0/lib/thor.rb:387:in'dispatch'
from.rvm/gems/ruby-2.3.3/gems/railties-5.1.6/lib/rails/command/base.rb:63:in'perform'
from.rvm/gems/ruby-2.3.3/gems/railties-5.1.6/lib/rails/command.rb:44:in'invoke'
from.rvm/gems/ruby-2.3.3/gems/railties-5.1.6/lib/rails/commands.rb:16:in`'
from.rvm/gems/ruby-2.3.3/gems/activesupport-5.1.6/lib/active\u support/dependencies.rb:292:in'require'
from.rvm/gems/ruby-2.3.3/gems/activesupport-5.1.6/lib/active\u support/dependencies.rb:292:in'block in require'
from.rvm/gems/ruby-2.3.3/gems/activesupport-5.1.6/lib/active\u support/dependencies.rb:258:in'load\u dependency'
from.rvm/gems/ruby-2.3.3/gems/activesupport-5.1.6/lib/active\u support/dependencies.rb:292:in'require'
来自Projects/mygem/themes/sample/bin/rails:9:in`'
from.rvm/gems/ruby-2.3.3/gems/activesupport-5.1.6/lib/active\u support/dependencies.rb:286:in'load'
from.rvm/gems/ruby-2.3.3/gems/activesupport-5.1.6/lib/active\u support/dependencies.rb:286:in'block in load'
from.rvm/gems/ruby-2.3.3/gems/activesupport-5.1.6/lib/active\u support/dependencies.rb:258:in'load\u dependency'
from.rvm/gems/ruby-2.3.3/gems/activesupport-5.1.6/lib/active\u support/dependencies.rb:286:in'load'
from.rvm/rubies/ruby-2.3.3/lib/ruby/site\u ruby/2.3.0/rubygems/core\u ext/kernel\u require.rb:59:in'require'
from.rvm/rubies/ruby-2.3.3/lib/ruby/site\u ruby/2.3.0/rubygems/core\u ext/kernel\u require.rb:59:in'require'
from-e:1:in`'

编辑：

---

下面是一个有问题的示例gem-

将其添加到项目根目录中的gem文件中：

group :development, :test do
  gem 'pry'
end

当然，我要跑了

bundle install

---

我认为您误解了“开发依赖性”的含义：（这与

rails

环境无关，因为大多数gem不依赖

rails

或环境标志）

:

声明依赖项

运行时与开发

RubyGems提供了两种主要的依赖关系“类型”：运行时和开发。运行时依赖关系是您的gem工作所需要的（例如需要activesupport的rails）

当有人想要修改您的gem时，开发依赖项非常有用。当您指定开发依赖项时，另一个开发人员可以运行gem安装--dev your_gem，RubyGems将获取这两组依赖项（运行时和开发）。典型的开发依赖关系包括测试框架和构建系统

在gemspec中设置依赖项很容易。只需使用添加运行时依赖项和添加开发依赖项：

因此，由于您的gem需要

pry

才能工作，根据您的设计，那么

pry

将是一个运行时依赖项。或者，您需要在代码周围设置一些陷阱来确定

• a） 是否定义了

  Rails

  ？及
• b） 我们是否处于

  开发环境中？

  环境中？及
• c）

  Pry

  是否已定义？或
• d） 我们可以加载

  pry

  （从

  LoadError

  中解救出来）吗

---

您运行什么命令来获取此错误？我是在使用mygem的rails应用程序中运行rails g mygem:install时得到的。

安装发电机.rbgroup :development, :test do
  gem 'pry'
end

bundle install

Gem::Specification.new do |s|
  s.name = "hola"
  s.version = "2.0.0"
  s.add_runtime_dependency "daemons", ["= 1.1.0"]
  s.add_development_dependency "bourne", [">= 0"]