如何在ruby中将表单响应保存在JSON文件中？

Question

我正在尝试将在表单/调查中提交的响应存储到JSON文件中。目前，我的JSON文件返回null。我在弄清楚如何将表单上的响应保存到JSON文件时遇到麻烦。

survey.rb

require 'json'       

class Survey
  attr_reader :nationality, :employed, :income, :email

  def initialize(args={})
    @nationality = args["nationality"]
    @employed = args["employed"]
    @income = args ["income"]
    @email =args ["email"]
  end


    def save
      json = {
        email: @email,
        nationality: @nationality,
        employed: @employed,
        income: @income
      }.to_json

      open('answers.json', 'a') do |file|
        file.puts json
      end
    end

end

app.rb

require 'rack'
require_relative 'route'
require_relative 'template'
require_relative 'admin'
require_relative 'survey'


class App

  def call(env)
    response_headers = {}

    request_cookies = Rack::Utils.parse_cookies(env)
    route = Route.new(env)
    status = route.name =~ /^\d\d\d$/ ? route.name.to_i : 200
    template = Template.new(route.name, visit_count: request_cookies["session_count"].to_i+1)

    [status, response_headers, [template.render]]

  end



  survey = Survey.new ''  
  survey
  survey.save

end

admin.rb

require 'sinatra/base'
require 'rack'
require 'erb'
require_relative 'route'

class Admin < Sinatra::Base






  use Rack::Auth::Basic, "Protected Area" do |username, password|
    username == 'minhaj' && password == 'minhaj'
  end

  get '/'  do
    "<div>hi for some reason I don't need to put this in a string #{5+5}</div>
        <p>
        </div>hello</div>
        </p>

    "
  end

end

route.rb

class Route
  ROUTES = {
    "GET" => {
      "/"  => :home,
      "/admin"  => :admin,
      "/authentication" => :authentication,
    },
    "POST" => {
      "/check" => :check
    }
  }

  attr_accessor :name

  def initialize(env)
    path = env["PATH_INFO"]
    http_method = env["REQUEST_METHOD"]
    @name = (ROUTES[http_method] && ROUTES[http_method][path]) || :not_found
  end
end

config.ru

#! usr/bin/env ruby
require 'rack'
load 'admin.rb'
load 'visit_counter.rb'
load 'app.rb'




require File.expand_path '../admin.rb', __FILE__

use Rack::Static, :urls => ['/stylesheet/style.css'], :root => 'public'


run Admin.new
run App.new
use VisitCounter

run Rack::URLMap.new({ "/admin" => Admin.new, "/" => App.new })

到目前为止，这是它的外观，正如我在运行应用程序时所提到的那样，我的Answers.json返回

{"email":null,"nationality":null,"employed":null,"income":null}

而不是返回在我的表单页面上提交的值。

Answer 1

也许您可以尝试以下操作：

file = File.open(File.dirname(__FILE__) + '/answers.json', 'a+')
file.write json
file.write "\n"
file.close

请确保实际上首先填充了json，您可以通过puts json进行检查，或者如果您使用的是红宝石，则可以在调试模式下运行并在其上放置一个断点。

此外，您不能只是将代码放在类中并期望其被执行。

移动：

survey = Survey.new ''  
survey.save

插入一个方法并专门调用它，或将其包括在call方法中。

让我知道它是否有效