ruby - Sinatra 发布请求时出现无效的 URI 错误

Question

作为 RSpec tutorial 的一部分，我正在研究 Sinatra 演示应用程序(official repo)。该应用程序使用 a la carte 安装 ActiveRecord — 没有 Rails。当我在运行规范时尝试将 Book 对象发布到服务器时，我得到一个 InvalidURIError。

Failures:

  1) App creates a book
     Failure/Error: post :books, book: { name: "My first book" }
     URI::InvalidURIError:
       bad URI(is not URI?): books
     # /Users/andrekibbe/.rvm/gems/ruby-2.2.1/gems/rack-test-0.6.3/lib/rack/test.rb:193:in `env_for'
     # /Users/andrekibbe/.rvm/gems/ruby-2.2.1/gems/rack-test-0.6.3/lib/rack/test.rb:66:in `post'
     # ./spec/rack_spec.rb:10:in `block (2 levels) in <top (required)>'

rack_spec.rb:

require "environment"
require "rack_app"

fdescribe App do
  include Rack::Test::Methods

  let(:app) { App }

  it "creates a book" do
    post :books, book: { name: "My first book" }

    expect(last_response.status).to eq 201
  end
end

rack_app.rb:

class App < Sinatra::Base
  post '/books' do
    book = Book.new params[:book]
    if book.save
      status 201
    else
      status 502
    end
  end
end

spec_helper.rb:

require "environment"
require "factory_girl"
require "database_cleaner"
require "rack/test"
require_relative "./factories.rb"

RSpec.configure do |config|
  config.include FactoryGirl::Syntax::Methods
  config.include Rack::Test::Methods

  config.before(:suite) do
    begin
      DatabaseCleaner.start
    ensure
      DatabaseCleaner.clean
    end
  end
end

book.rb:

class Book < ActiveRecord::Base
  validates_presence_of :name
end

环境.rb:

require "sinatra"
require "active_record"

ActiveRecord::Base.establish_connection(
  adapter: :sqlite3,
  database: File.expand_path("../../db/test.sqlite3", __FILE__)
)

post :books, book: { name: "My first book"} 是什么让 Rack 将请求视为错误的 URI？

Answer 1

如果您进行了我在评论中建议的更改，您的代码对我有用，但是，如果您在代码中确实使用了以下内容:

post '/books', book: {...}

或:

post :'/books', ...

...那么这些行当然行不通了。 ... 的意思是“与您的原始代码相同，因为输入它是在浪费我的时间”。推荐的更改应该如下所示:

rack_app.rb:

require "environment"
require "rack_app"

fdescribe App do
  let(:app) { App }

  it "creates a book" do
    post '/books', book: { name: "My brand new book" }
    expect(last_response.status).to eq 201
  end
end

您的应用定义的唯一路由在这里:

class App < Sinatra::Base
  #       +--------This is the only url your App responds to  
  #       |        and ONLY if it is contained in a post request
  #       V
  post '/books' do

    book = Book.new params[:book]

    if book.save
      status 201
    else
      status 502
    end

  end

end

即使使用 Symbol 作为 url 也不起作用:

  it "creates a book" do
    post :'/books', book: { name: "My brand new book" }

而且，因为 Symbol 对 rspec 测试中的 url 不起作用，这意味着 Sinatra 接受给 post() 的第一个参数，例如:'/books'，并将其与您在 App 类中定义的路由进行比较:

defined_route = '/books'
requested_route = :'/books'

if requested_route != defined_route
  puts "URI ERROR"
end

--output:--
URI ERROR