ruby on rails 3-如何在开发模式下对每个请求重新加载gem



我有一个Rails应用程序,它使用了我正在积极开发的gem。如何指示应用程序在每次请求时重新加载宝石?

这个解决方案几乎可以工作,但由于某种原因,我不得不将其放入application.rb,而不是environments/development.rb,否则无法识别自动加载路径。

我添加了一些额外的东西,可以自动获取路径。

if Rails.env.development?
  reload_gems = %w(my_gem other_gem) # names of gems which should autoreload
  config.autoload_paths += Gem.loaded_specs.values.inject([]){ |a,gem| a += gem.load_paths if reload_gems.include? gem.name; a }
  require 'active_support/dependencies'
  ActiveSupport::Dependencies.explicitly_unloadable_constants += reload_gems.map { |gem| gem.classify }
end

可以使用gem 'my_gem', :path => '../my_gem' 添加本地宝石

您可以在应用程序的autoload路径中添加到gem的路径。

因此,在config/application.rb中,在class Application < Rails::Application ... end块中添加:

config.autoload_paths += %W(#{config.root}/vendor/gems/my_gem/lib)
config.autoload_paths += Dir["#{config.root}/vendor/gems/my_gem/lib/**/"]

然后,在运行开发服务器时,中的所有文件都应该重新加载。

对于引擎:

module Copycat
  class Engine < ::Rails::Engine
    if Rails.env.development?
      config.to_prepare do
        Rails.logger.debug "RELOADING COPYCAT"
        require_dependency Copycat::Engine.root.join('lib', 'copycat').to_s
      end
      config.after_initialize do
        # optional, without it will call `to_prepend` only when a file changes,
        # not on every request
        Rails.application.config.reload_classes_only_on_change = false
      end
    end
  end
end

我刚刚发现很棒https://github.com/colinyoung/gem_reloader-对我有用!

超级简单的修复:

In yourApp/config/envirornments/development.rb:
YourApp::Application.configure do
  # Make sure both of these two settings are set to false, add them if you can't find them
  config.cache_classes =  false
  config.action_controller.perform_caching = false
  #
  #
  # Other config settings...
  #
  #
end

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