在Ruby on Rails窗体中选择并打开onChange [英] select and onChange in a Ruby on Rails form

问题描述

我浏览了所有关于这个主题的问题和答案，但我仍然无法让自己的方案奏效。
我想在选择下拉菜单选项时触发单击按钮操作;看起来很简单，应该在AJAX中很常见。

以下是我的代码的相关摘录：

<$ p $ <@ c $ c><％= form_for（@test，：html => {：id =>form_id，：name =>MyForm，：remote =>true} ）do | form | ％GT;
<％= form.labelMenu1％>
<％= form.select（：Menu1，[[Option1，value1]，[Option2，value2]]，：html_options => {：onChange =>javascript ：this.form.apply_button_name.click（）;}）％>

<！ - 更多选择菜单和文本字段 - >

< div class =actions>
<％= form.submitApply，：name => apply_button_name，：remote => true％>
< / div>
<％end％>

我对表单和按钮使用了：remote =>true，因为这是唯一的我也尝试过使用和不使用明确的html_options和javascript：，在我浏览了一些SO的答案之后，我发现它并没有帮助，我也尝试过选择，onClick而不是onChange，但仍然

生成的HTML如下：

  Menu1 
< select id =test_Menu1name =test [Menu1]>< option value =value1> Option1< / option> 
< option value =value2 =selected> Option2< / option>< / select> 
  

正如你所看到的，在HTML代码中没有onChange事件处理程序;为什么？任何人都看到我做错了什么？

感谢您的帮助。

<解决方案

将您的调用修改为 form.select ，如下所示：

 <％= form.se lect：Menu1，[[Option1，value1]，[Option2，value2]]，{}，
：onChange =>javascript：this.form.apply_button_name.click（） ;％> 
  

I browsed all SO questions and answers about this topic but I'm still unable to make my scenario work. I want to trigger a click button action when a dropdown menu option is selected ; seems simple and should be very common with AJAX.

Here are the relevant excerpts of my code:

<%= form_for(@test, :html => {:id => "form_id", :name => "MyForm", :remote => "true"}) do |form| %>
    <%= form.label "Menu1" %>
    <%= form.select (:Menu1, [["Option1","value1"],["Option2","value2"]], :html_options=>{:onChange=>"javascript: this.form.apply_button_name.click();"}) %>

    <!-- more select menus and text fields here -->

    <div class="actions">
        <%= form.submit "Apply", :name => "apply_button_name", :remote => "true" %>
    </div>
<% end %>

I used ":remote => "true" both for the form and the button because that's the only way to get AJAX working. I also tried with and without explicit "html_options" and "javascript:", after I browsed some SO answers that suggested that but that did not help. I also tried onSelect, and onClick instead of onChange, but still no luck.

The generated HTML is the following:

    Menu1
    <select id="test_Menu1" name="test[Menu1]"><option value="value1">Option1</option>
<option value="value2" selected="selected">Option2</option></select>

As you can see, there's no onChange event handler in the HTML code ; WHY? Anyone is seeing what am I doing wrong?

Thanks for any help.

解决方案

Modify your call to form.select, like this:

<%= form.select :Menu1, [["Option1","value1"],["Option2","value2"]], {}, 
                :onChange=>"javascript: this.form.apply_button_name.click();" %>

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