javascript - 当选中复选框时，如何动态地将复选框值从 View 传递到 Controller ？

Question

每次选中复选框时，我都会尝试将所有选中值的数组发送到 Controller ，但无法弄清楚如何使用 AJAX 来执行此操作。

html.erb:

<div class="items">
<input type="checkbox" class="item-checkbox" value="a">A
<input type="checkbox" class="item-checkbox" value="b">B
<input type="checkbox" class="item-checkbox" value="c">C
</div>

JavaScript:

var selected_items = [];
$(".item-checkbox").click(function() {
        var item = $( this ).val();
        selected_items.push(item);
 }

Controller :

class BudgetController < ApplicationController

  def view

  ....

  end

end

如何将 selected_items 数组传递到 Controller 而无需重新加载页面？

Answer 1

这涉及将它们放入表单中并提交表单:

$('#MyForm').submit(function (event) {       
   event.preventDefault(); // stop form from submitting normally
   var form = $(this); // get the form
   var dataToSend = form.serialize(); // get the submitted form items
   var url = form.attr('action'); // where we're submitting the data to
   $.post(url, dataToSend, function (data) {
      // optional function to deal with returned data
   }).done(function (data) {
      // what to do when it's completed
   }).fail(function (jqXHR, textStatus, errorThrown) {
      // what to do if it fails
   });
});

然后您可以像在服务器端处理常规表单提交一样处理它们。