Javascript Rails在完成后通过Ajax发出Flash通知的方法

当我的控制器成功完成上传文件时，我希望通过ajax将flash通知发送回我的视图。但是，我不知道如何确切地处理来自服务器的响应。下面我所拥有的是我认为非常接近我想要的东西，但它不太起作用。任何帮助都将不胜感激。谢谢大家!

我的控制器

def import
    begin
      Thread.new do
        Order.import(params[:file])
        ActiveRecord::Base.connection.close
      end
    rescue
      redirect_to root_url, notice: "Invalid CSV file format."
    end
    format.js { flash.now[:notice] = "Here is my flash notice" }
end

我的Ajax Javascript

$(function() {

  var bar = $('.bar');
  var percent = $('.percent');
  var status = $('#status');

  $('form').ajaxForm({
    beforeSend: function() {
      status.empty();
      var percentVal = '0%';
      bar.width(percentVal);
      percent.html(percentVal);
    },
    uploadProgress: function(event, position, total, percentComplete) {
      var percentVal = percentComplete + '%';
      bar.width(percentVal);
      percent.html(percentVal);
    },
    complete: function(xhr) {
      status.html(xhr); //I think I need to change this but not sure what to
    }
  });
});

---

我收到一个内部服务器错误500。OrdersController中的ArgumentError在您的代码和我的代码中导入的参数太少。如果我重定向，它会在网页中给我一个网页副本，否则会导致内部服务器错误。你知道为什么吗？

def import
    begin
      Thread.new do
        Order.import(params[:file])
        ActiveRecord::Base.connection.close
      end
    rescue
      redirect_to root_url, notice: "Invalid CSV file format."
    end
     @notice = "Here is my flash notice"
end

$(function() {

  var bar = $('.bar');
  var percent = $('.percent');
  var status = $('#status');

  $('form').ajaxForm({
    beforeSend: function() {
      status.empty();
      var percentVal = '0%';
      bar.width(percentVal);
      percent.html(percentVal);
    },
    uploadProgress: function(event, position, total, percentComplete) {
      var percentVal = percentComplete + '%';
      bar.width(percentVal);
      percent.html(percentVal);
    },
    complete: function(response) {
       // replace the response in the div which displays notice
       status.html(response)
          }
  });
});