main:Object(NoMethodError)Sinatra的未定义方法`run' [英] undefined method `run' for main:Object (NoMethodError) Sinatra

问题描述

require 'sinatra/base'

class Foo < Sinatra::Base
  get('/foo') { 'foo' }
end

class Bar < Sinatra::Base
  get('/bar') { 'bar' }
end

run Rack::Cascade, [Foo, Bar]

我只是无法猜出这段代码有什么问题. 当我运行:ruby server.rb时，它抛出一个错误

I just can't guess what is wrong with this code. When I ran: ruby server.rb, it throws an error

推荐答案

首先，最后一行应读

run Rack::Cascade.new [Foo, Bar]

但是您只能在Rackup文件中使用它.因此，第二步，您需要创建一个名为config.ru的文件(Rackup File)，其内容如下:

But you can only use this in a Rackup File. So second, you need to create a File called config.ru (Rackup File) with the following contents:

require './app'
run Rack::Cascade.new [Foo, Bar]

和一个名为app.rb的文件，其中包含您的实际应用程序:

and a file called app.rb with your actual app:

require 'sinatra/base'

class Foo < Sinatra::Base
  get('/foo') { 'foo' }
end

class Bar < Sinatra::Base
  get('/bar') { 'bar' }
end

然后您可以通过在命令行中键入启动服务器

then you can start the server by typing in the command line

$ rackup
>> Thin web server (v1.3.1 codename Triple Espresso)
>> Maximum connections set to 1024
>> Listening on 0.0.0.0:9292, CTRL+C to stop

之后，打开第二个命令行窗口并测试您的应用程序:

after that, open a second command line window and test your app:

$ curl 0.0.0.0:9292/foo
foo%
$ curl 0.0.0.0:9292/bar
bar%    

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