ruby-on-rails – 如何使用Rails 4和Ruby 2.0应用程序进行实时重

发布时间：2020-12-16 19:39:23 所属栏目：百科来源：网络整理

导读：如果我在Rails 4 Ruby 2.0项目的文本编辑器中编辑.scss或.erb文件,我想在浏览器中看到实时更改. 我试过Guard和Guard-live-reload,但是它会抛出以下错误. 22:58:04 - ERROR - Could not load 'guard/rspec' or find class Guard::Rspec22:58:04 - ERROR - /ho

如果我在Rails 4 Ruby 2.0项目的文本编辑器中编辑.scss或.erb文件,我想在浏览器中看到实时更改.

我试过Guard和Guard-live-reload,但是它会抛出以下错误.

22:58:04 - ERROR - Could not load 'guard/rspec' or find class Guard::Rspec
22:58:04 - ERROR - /home/jitendra/.rvm/gems/ruby-2.1.1@global/gems/guard-2.6.1/lib/guard/plugin_util.rb:100:in `require'
> [#] /home/jitendra/.rvm/gems/ruby-2.1.1@global/gems/guard-2.6.1/lib/guard/plugin_util.rb:100:in `plugin_class'
> [#] /home/jitendra/.rvm/gems/ruby-2.1.1@global/gems/guard-2.6.1/lib/guard/plugin_util.rb:57:in `initialize_plugin'
> [#] /home/jitendra/.rvm/gems/ruby-2.1.1@global/gems/guard-2.6.1/lib/guard.rb:167:in `add_plugin'
> [#] /home/jitendra/.rvm/gems/ruby-2.1.1@global/gems/guard-2.6.1/lib/guard/dsl.rb:174:in `block in guard'
> [#] /home/jitendra/.rvm/gems/ruby-2.1.1@global/gems/guard-2.6.1/lib/guard/dsl.rb:173:in `each'
> [#] /home/jitendra/.rvm/gems/ruby-2.1.1@global/gems/guard-2.6.1/lib/guard/dsl.rb:173:in `guard'
> [#] /home/jitendra/milaap-webapp/Guardfile:4:in `_instance_eval_guardfile'
> [#] /home/jitendra/.rvm/gems/ruby-2.1.1@global/gems/guard-2.6.1/lib/guard/guardfile/evaluator.rb:97:in `instance_eval'
> [#] /home/jitendra/.rvm/gems/ruby-2.1.1@global/gems/guard-2.6.1/lib/guard/guardfile/evaluator.rb:97:in `_instance_eval_guardfile'
> [#] /home/jitendra/.rvm/gems/ruby-2.1.1@global/gems/guard-2.6.1/lib/guard/guardfile/evaluator.rb:37:in `evaluate_guardfile'
> [#] /home/jitendra/.rvm/gems/ruby-2.1.1@global/gems/guard-2.6.1/lib/guard/setuper.rb:148:in `evaluate_guardfile'
> [#] /home/jitendra/.rvm/gems/ruby-2.1.1@global/gems/guard-2.6.1/lib/guard/setuper.rb:64:in `setup'
> [#] /home/jitendra/.rvm/gems/ruby-2.1.1@global/gems/guard-2.6.1/lib/guard/commander.rb:24:in `start'
> [#] /home/jitendra/.rvm/gems/ruby-2.1.1@global/gems/guard-2.6.1/lib/guard/cli.rb:107:in `start'
> [#] /home/jitendra/.rvm/gems/ruby-2.1.1@global/gems/thor-0.19.1/lib/thor/command.rb:27:in `run'
> [#] /home/jitendra/.rvm/gems/ruby-2.1.1@global/gems/thor-0.19.1/lib/thor/invocation.rb:126:in `invoke_command'
> [#] /home/jitendra/.rvm/gems/ruby-2.1.1@global/gems/thor-0.19.1/lib/thor.rb:359:in `dispatch'
> [#] /home/jitendra/.rvm/gems/ruby-2.1.1@global/gems/thor-0.19.1/lib/thor/base.rb:440:in `start'
> [#] /home/jitendra/.rvm/gems/ruby-2.1.1@global/gems/guard-2.6.1/bin/guard:6:in `<top (required)>'
> [#] /home/jitendra/.rvm/gems/ruby-2.1.1@global/bin/guard:23:in `load'
> [#] /home/jitendra/.rvm/gems/ruby-2.1.1@global/bin/guard:23:in `<main>'
> [#] /home/jitendra/.rvm/gems/ruby-2.1.1@global/bin/ruby_executable_hooks:15:in `eval'
> [#] /home/jitendra/.rvm/gems/ruby-2.1.1@global/bin/ruby_executable_hooks:15:in `<main>'
22:58:04 - ERROR - Invalid Guardfile,original error is:
> [#] undefined method `superclass' for nil:NilClass
/home/jitendra/.rvm/gems/ruby-2.1.1@global/gems/guard-2.6.1/lib/guard/plugin_util.rb:57:in `initialize_plugin': undefined method `superclass' for nil:NilClass (NoMethodError)
    from /home/jitendra/.rvm/gems/ruby-2.1.1@global/gems/guard-2.6.1/lib/guard.rb:167:in `add_plugin'
    from /home/jitendra/.rvm/gems/ruby-2.1.1@global/gems/guard-2.6.1/lib/guard/dsl.rb:174:in `block in guard'
    from /home/jitendra/.rvm/gems/ruby-2.1.1@global/gems/guard-2.6.1/lib/guard/dsl.rb:173:in `each'
    from /home/jitendra/.rvm/gems/ruby-2.1.1@global/gems/guard-2.6.1/lib/guard/dsl.rb:173:in `guard'
    from /home/jitendra/milaap-webapp/Guardfile:4:in `_instance_eval_guardfile'
    from /home/jitendra/.rvm/gems/ruby-2.1.1@global/gems/guard-2.6.1/lib/guard/guardfile/evaluator.rb:97:in `instance_eval'
    from /home/jitendra/.rvm/gems/ruby-2.1.1@global/gems/guard-2.6.1/lib/guard/guardfile/evaluator.rb:97:in `_instance_eval_guardfile'
    from /home/jitendra/.rvm/gems/ruby-2.1.1@global/gems/guard-2.6.1/lib/guard/guardfile/evaluator.rb:37:in `evaluate_guardfile'
    from /home/jitendra/.rvm/gems/ruby-2.1.1@global/gems/guard-2.6.1/lib/guard/setuper.rb:148:in `evaluate_guardfile'
    from /home/jitendra/.rvm/gems/ruby-2.1.1@global/gems/guard-2.6.1/lib/guard/setuper.rb:64:in `setup'
    from /home/jitendra/.rvm/gems/ruby-2.1.1@global/gems/guard-2.6.1/lib/guard/commander.rb:24:in `start'
    from /home/jitendra/.rvm/gems/ruby-2.1.1@global/gems/guard-2.6.1/lib/guard/cli.rb:107:in `start'
    from /home/jitendra/.rvm/gems/ruby-2.1.1@global/gems/thor-0.19.1/lib/thor/command.rb:27:in `run'
    from /home/jitendra/.rvm/gems/ruby-2.1.1@global/gems/thor-0.19.1/lib/thor/invocation.rb:126:in `invoke_command'
    from /home/jitendra/.rvm/gems/ruby-2.1.1@global/gems/thor-0.19.1/lib/thor.rb:359:in `dispatch'
    from /home/jitendra/.rvm/gems/ruby-2.1.1@global/gems/thor-0.19.1/lib/thor/base.rb:440:in `start'
    from /home/jitendra/.rvm/gems/ruby-2.1.1@global/gems/guard-2.6.1/bin/guard:6:in `<top (required)>'
    from /home/jitendra/.rvm/gems/ruby-2.1.1@global/bin/guard:23:in `load'
    from /home/jitendra/.rvm/gems/ruby-2.1.1@global/bin/guard:23:in `<main>'
    from /home/jitendra/.rvm/gems/ruby-2.1.1@global/bin/ruby_executable_hooks:15:in `eval'
    from /home/jitendra/.rvm/gems/ruby-2.1.1@global/bin/ruby_executable_hooks:15:in `<main>'

解决方法

这是我如何使用livereload：

1)获得gem

在你的宝石文件中：

group :development do
  gem 'guard-livereload',require: false
end

2.)保护init livereload,这将在你的应用程序的根目录下生成一个Guardfile.

3.打开你的Guardfile应该看起来像这样(只要Guard-Livereload,如果你运行其他防护插件,确保它们在livereload之下).

guard 'livereload' do
  watch(%r{app/views/.+.(erb)$})
  watch(%r{app/helpers/.+.rb})
  watch(%r{public/.+.(css|js|html)})
  watch(%r{config/locales/.+.yml})
  watch(%r{(app|vendor)(/assets/w+/(.+.(css|js|html|png|jpg))).*}) { |m| "/assets/#{m[3]}" }
end

4.)从Chrome Web Store获取Livereload Chrome应用程序

5.)重新启动服务器并打开一个单独的选项卡,然后键入 – >守卫

6.)在浏览器中,pushreload按钮应该链接它(浏览器连接在Guard选项卡中)

我写的很广泛的其他人可能会绊倒同样的问题.对于您的具体情况,请阅读#3.打开你的保护文件,并确保首先调用livereload.

Go watch the 07002

使用SSL时,livereload并不是很好.

Rack-Livereload是一个整洁的小宝石,您可以添加到您的项目,以解决SSL问题.宝石插入一个或Rack中间件,并基本上连接到livereload应用程序,以通过现有(和启用SSL)的Rails服务器来提供JavaScript.

（编辑：李大同）

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