ruby - 练习 50::http://ruby.learncodethehardway.org/book/ex50.html(使用 sinatra 运行 hello world 时出错”

Question

我正在尝试 ex:50 of learning Ruby the hard way ..其中涉及使用“sinatra”创建 hello_world 应用程序 我收到如下错误:

 ruby lib/gothonweb.rb
    lib/gothonweb.rb:5:in `<module:Gothonweb>': undefined method `get' for Gothonweb:Module             (NoMethodError)
    from lib/gothonweb.rb:4:in `<main>'

Answer 1

这不是您所做的事情，给出的代码不起作用:

require_relative "gothonweb/version"
require "sinatra"

module Gothonweb
  get '/' do
    greeting = "Hello, World!"
    return greeting
  end
end

这不起作用，因为它被包装在模块中。试试这个:

require_relative "gothonweb/version"
require "sinatra"

get '/' do
  greeting = "Hello, World!"
  greeting # there's no need for the return here,
           # the last expression is the return value
end