Ruby on rails - Ajax 不会每 3 秒正确重新加载一次。为什么？

Question

我试图让它重新加载显示每3秒未读消息数量的部分。

但是我写的代码根本不会显示数字，即使有1个未读消息…
我如何重新加载显示未读消息的正确数量的部分??

我的代码是

资产/javascript/refresh_messages_count.js

$(document).ready(function () {
    // will call refreshPartial every 3 seconds
    setInterval(refreshPartial, 3000)
});
function refreshParital() {
  $.ajax({
    url: "messages/refresh_part";
  })
}

messages_controller.rb

def refresh_part
    @message_count = current_user.mailbox.inbox(:read => false).count(:id, :distinct => true)
    # get whatever data you need to a variable named @data
    respond_to do |format|
        format.js {render :action=>"refresh_part.js"}
    end
end

视图/布局/_menu.html.erb

<span id="message_received_count">
  <%= render :partial => "layouts/message_received_count" %>
</span>

视图/布局/_message_received_count.html.erb

<% if user_signed_in? && current_user.mailbox.inbox(:read => false).count(:id, :distinct => true) > 0 %>
  <li><%= link_to sanitize('<i class="icon-envelope"></i> ') + "Received" + sanitize(' <span class="badge badge-info">'+@message_count.to_s+'</span>'), messages_received_path  %> 
  </li>
<% else %>
  <li><%= link_to sanitize('<i class="icon-envelope"></i> ') + "Received", messages_received_path  %>
  </li>

视图/信息/refresh_part.js.erb

$('#message_received_count').html("#{escape_javascript(render 'layouts/messages_received_count', data: @message_count)}");

Answer 1

将您的函数refreshPartial更改为以下内容:

function refreshPartial() {
  $.ajax({
    url: "/messages/refresh_part",
    type: "GET",
    dataType: "script",
    success: function(data) {
             console.log("Called refresh_part");
    },
    error: function (xhr, ajaxOptions, thrownError) {
      alert("Error: " + xhr.status + " " + thrownError);
    }
  });
}

(消息前面的/很重要，其他字段也很有用——一旦你让它工作，你可以删除成功选项)

并将控制器中的方法更改为:

def refresh_part
    @message_count = current_user.mailbox.inbox(:read => false).count(:id, :distinct => true)
    # get whatever data you need to a variable named @data
    respond_to do |format|
        format.js 
    end
end

(删除render部分- rails知道如何自动执行此操作)。

编辑

经过讨论——最后一个要解决的问题与JQuery冲突有关——JQuery被包含在多个地方，并停止$(document)。准备开火。固定的。