ruby - ruby webdriver 错误：在缓存中找不到元素 - 页面可能在查找后已更改

Question

我将在页面上找到所有 li 元素，它们在它们的属性中都有唯一的 id，其中一些是隐藏的，单击页面上的更多按钮可以使它们可见。这是代码：

def open_template id=0
      sleep 1
      #try to get all the li elements that has class named like "test..." and put them into a list
      box_list=browser.lis.find_all { |div| div.class_name =~ /^test/ }   
      sleep 2
      #go though the list
      box_list.each do |each|
         str=each.a.attribute_value("href")
         #the tid number of the element should match to id
         if /\?tid=\d+/.match(str)[0].gsub!("?tid=", "").to_i==id
            # if the element is hidden, should click the "more" button and get into another page
            if each.attribute_value("style")=="display: none;"
              each.parent.parent.div(class: "title_me_h").a(class: "more").click
              sleep 2
              # begin the same thing on the new page
              open_template(id)
            end
            begin
              #if the element matchs and isn't hidden, do a click          
              each.a(class: "li_box_cj").wait_until_present 
              each.a(class: "li_box_cj").click
            rescue Exception => e
              puts "ERROR: #{e.message}"            
            end
            break
         end
      end
    end

当我试图找到一个隐藏的 li 元素时，在执行代码后我得到元素在缓存中找不到错误，但最后一个动作“点击”被执行了。我不明白为什么，谁能给我一些建议？我已阅读有关 stackoverflow 的所有相关问题，但没有得到答案。谢谢你提前。

Answer 1

def open_template id=0
  sleep 1
  box_list=browser.lis.find_all { |div| div.class_name =~ /^test/ }   
  sleep 2
  box_list.each do |each|
     str=each.a.attribute_value("href")
     if /\?tid=\d+/.match(str)[0].gsub!("?tid=", "").to_i==id
        if each.attribute_value("style")=="display: none;"
          each.parent.parent.div(class: "title_me_h").a(class: "more").click
          sleep 2
          open_template(id)
        #add else here to break out of the loop
        else
        begin
          #if the element matchs and isn't hidden, do a click          
          each.a(class: "li_box_cj").wait_until_present 
          each.a(class: "li_box_cj").click
        rescue Exception => e
          puts "ERROR: #{e.message}"            
        end
        end
        break
     end
  end
end