将参数传递给新的sinatra app

Question

简单的问题:我希望能够在config.ru中将选项传递到我的sinatra应用程序中.怎么可能？我的config.ru看起来像这样:

run MyApp

但我想在我的MyApp类中使用它来获取参数:

class MyApp < Sinatra::Base
  def initialize(config)
    @config = config
  end
end

但我无法想办法做到这一点.想法？

Answer 1

1. 使用设置/设置

   require 'sinatra/base'
   
   class MyApp < Sinatra::Base
     get '/' do
       settings.time_at_startup.to_s
     end
   end
   
   # Just arbitrarily picking time as it'll be static but, diff for each run.
   MyApp.set :time_at_startup, Time.now
   
   run MyApp
   

2. 使用配置文件.请参阅contrib中的Sinatra :: ConfigFile(它也使用set和settings,但从YAML文件加载params)

Answer 2

如果你想用params配置,我发现你可以这样做:

require 'sinatra/base'

class AwesomeApp < Sinatra::Base
  def initialize(app = nil, params = {})
    super(app)
    @bootstrap = params.fetch(:bootstrap, false)
  end
end