javascript - ruby 变量在 driver.execute_script 之后返回 nil

Question

我试图返回一串用逗号分隔的很长的网址。该代码在控制台中运行良好，但是当我执行脚本时，ruby 变量 urls_list 为零。

require 'rubygems'
require 'selenium-webdriver'
require 'json'


driver = Selenium::WebDriver.for :firefox
    driver.manage.timeouts.implicit_wait = 20

driver.get "https://go.urbanairship.com/accounts/login/"
username = driver.find_element(:id, "id_username").send_keys "????"
password = driver.find_element(:id, "id_password").send_keys "????"
submit = driver.find_element(:class, "important").click

urls_list = driver.execute_script( "
     var urls = [];
     for (var i = 1; i < 37; i ++) {
       (function (i){
         $.getJSON('https://go.urbanairship.com/apps/-/list/'+ i + '/per_page=20').then(function(data) {   
            var json = data;
            for (var j = 0; j < json.objects.length; j++) {
              var url = json.objects[j].url
              urls.push(url);
             }  
          });
       }(i));

     }
     urls.toString();

")

sleep 10
puts urls_list # urls_list is nil

Answer 1

您必须向驱动程序提供更多有关脚本返回内容的提示。

例如，将其更改为:

return urls.toString();