如何在一个多记录Rails的形式设置复选框一个唯一的ID？ [英] How do I set a unique ID for checkboxes in a multi-record Rails form?

问题描述

我已经成立了一个Rails的形式大致按照这个 Railscast。

这里的code的形式：

 ＆LT;％的form_tag complete_todos_path，：方法=＆GT; ：把做％＆GT;
    ＆LT; UL＆GT;
    ＆LT; D​​IV ID =incomplete_todos＆GT;
    ＆LT;％@ incomplete_todos.each办|待办事项| ％＆GT;
    ＆LT;％=渲染：部分=＆GT;待办事项％＆GT;
    ＆LT;％结束％GT;
    ＆LT; / DIV＆GT;
    ＆LT; / UL＆GT;
    ＆LT;％= submit_tag为完成标志％＆GT;
＆LT;％结束％GT;
 

和这里的code的TODO部分：

 ＆LT; D​​IV CLASS =待办事项＆GT;
    ＆LT;李＆GT;
    ＆LT;％= check_box_tagtodo_ids []，todo.id％＆GT;
    ＆其中;％= H todo.name％GT;
    ＆LT;％=的link_to'编辑'，edit_todo_path（待办事项）％＆GT;
    ＆LT;％=的link_to删除，待办事项，：确认=＆GT; 你确定吗？，：方法=＆GT; ：删除％＆GT;
    ＆LT; /李＆GT;
＆LT; / DIV＆GT;
 

它的工作很大，但我希望开始实现Ajax，我需要每个复选框有一个唯一的ID。眼下，输入标签产生看起来是这样的：

 ＆LT;输入ID =todo_ids_NAME =todo_ids []类型=复选框值=7/＆GT;
 

每复选框具有相同的ID（todo_ids_），这是一个问题。我怀疑的解决方案是令人尴尬的简单，但我没有看到它。任何提示？

解决方案

我结束了使用类似瑞安的一个解决方案，但正如我在评论中写道，我不得不做出进一步的改变

。形式：

 ＆LT;％= check_box_tagtodo_ids [＃{todo.id}]，todo.id％＆GT;
 

在调用的形式操作：

  Todo.update_all（[，Time.nowcompleted_at =？]：n =＆GT; PARAMS [：todo_ids]。键）
 

请注意在PARAMS [：todo_ids]。键结尾，这是一个解决办法来处理与奇方式的参数进行了格式化的：

 todo_ids=＆GT; {5=＆gt;中5}
 

I've set up a Rails form roughly following the instructions in this Railscast.

Here's the code for the form:

<% form_tag complete_todos_path, :method => :put do %>
    <ul>
    <div id="incomplete_todos">
    <% @incomplete_todos.each do |todo| %>
    	<%= render :partial => todo %>
    <% end %>
    </div>
    </ul>
    <%= submit_tag "Mark as completed" %>
<% end %>

And here's the code for the todo partial:

<div class="todo">
    <li>
    	<%= check_box_tag "todo_ids[]", todo.id %>
    	<%=h todo.name %>
    	<%= link_to 'edit', edit_todo_path(todo) %>
    	<%= link_to 'delete', todo, :confirm => 'Are you sure?', :method => :delete %>
    </li>
</div>

It's working great, but I'm looking to start implementing AJAX and I need each checkbox to have a unique id. Right now, the input tags generated look something like this:

<input id="todo_ids_" name="todo_ids[]" type="checkbox" value="7" />

Every check box has the same id ("todo_ids_"), which is a problem. I suspect the solution is embarrassingly simple, but I'm not seeing it. Any tips?

解决方案

I ended up using a solution similar to Ryan's, but as I wrote in the comment I had to make a further change. In the form:

<%= check_box_tag "todo_ids[#{todo.id}]", todo.id %>

In the action called by the form:

Todo.update_all(["completed_at = ?", Time.now], :id => params[:todo_ids].keys)

Note the "params[:todo_ids].keys" at the end, which was a workaround to deal with the odd way the parameters were formatted:

"todo_ids" => {"5"=>"5"}

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