rails 3 breadcrumbs_on_rails

Question

我正在尝试使用Rails3应用程序配置breadcrumbs_on_rails

我已经添加了

gem 'breadcrumbs_on_rails'

放入我的gemfile中

此外，我还放置了包括BreadcrumbsOnRails::ControllerMixin

require File.expand_path('../boot', __FILE__)

require 'rails/all'

include BreadcrumbsOnRails::ControllerMixin

if defined?(Bundler)
....

到application.rb中

但不管怎样，我总是收到错误：

runnerw.exe C:\Ruby\bin\ruby.exe -e $stdout.sync=true;$stderr.sync=true;load($0=ARGV.shift) /script/rails server -b 127.0.0.1 -p 3000 -e development
/config/application.rb:1:in `<top (required)>': uninitialized constant BreadcrumbsOnRails (NameError)
    from C:/Ruby/lib/ruby/gems/1.9.1/gems/railties-3.2.1/lib/rails/commands.rb:53:in `require'
    from C:/Ruby/lib/ruby/gems/1.9.1/gems/railties-3.2.1/lib/rails/commands.rb:53:in `block in <top (required)>'
    from C:/Ruby/lib/ruby/gems/1.9.1/gems/railties-3.2.1/lib/rails/commands.rb:50:in `tap'
    from C:/Ruby/lib/ruby/gems/1.9.1/gems/railties-3.2.1/lib/rails/commands.rb:50:in `<top (required)>'
    from /script/rails:6:in `require'
    from /script/rails:6:in `<top (required)>'

如何解决这个错误？谢谢

Answer 1

嗨，朋友，在bundler加载你的gem 'breadcrumbs_on_rails‘之后，常量BreadcrumbsOnRails::ControllerMixin就可以使用了。

但是在bundler加载gem之前，您已经使用了BreadcrumbsOnRails::ControllerMixin。

gems是在执行以下您必须使用的lines.so之后加载的

require 'rails/all'

if defined?(Bundler)
 # If you precompile assets before deploying to production, use this line
   Bundler.require(*Rails.groups(:assets => %w(development test)))
  # If you want your assets lazily compiled in production, use this line
 # Bundler.require(:default, :assets, Rails.env)
end
include BreadcrumbsOnRails::ControllerMixin

这是你的宝石的文件。

https://github.com/weppos/breadcrumbs_on_rails

祝好运。

Answer 2

浏览@soundar提供的文档，我在源代码或文档中没有看到ControllerMixin。我也不认为需要在config/application.rb中放入任何内容