Ruby on Rails：重新排序checkbox标签

问题描述：

我有一个应用程序，用户可以将项目输入数据库。其中一个字段允许用户选择多种技术。我想要技术列表按字母顺序显示，因为目前它们按照他们输入数据库的顺序出现。

I have an app where a user can enter projects into a database. One of the fields allows the user to pick multiple technologies. I want the list of technologies to appear in alphabetical order, because at the moment, they appear in the order they were entered into the database.

这是我的新操作我的专案控制器：

Here is my new action in my project controller:

def new
    @project = Project.new
        @technol = Technol.new(params[:tech])

        @all_technols = Technol.all
        tech_ids = params[:technols][:id].reject(&:blank?) unless params[:technols].nil?


        @project_technol = @project.projecttechnols.build

    respond_to do |format|
      format.html # new.html.erb
      format.json { render json: @project }
    end
  end

这是我的新视图的一部分：

Here is part of my new view:

<div class="tech" STYLE="text-align: left;">
  <b>Technologies:</b>
  <style>
    .split { text-align:left; }
  </style>


  <p><ul> 

  <% for technol in Technol.all %> 
   <li class="split"> 
    <%= check_box_tag "project[technol_ids][]", technol.id,  @project.technols.include?(technol) %> 
    <%= technol.tech %> 
   </li> 

  <% end %> 
 </ul> 
 </p>

有没有任何想法？我是新的rails，所以请记住这一点，当试图回答。提前感谢。

Does anyone have any ideas? I am new to rails so please remember this when trying to answer. Thanks in advance.

答

您应该订购您的技术列表：

You should order the list of your thechnologies:

@all_technols = Technol.order('tech ASC') # in the controller's action

然后在视图中使用此变量，而不是调用 Technol.all 第二次：

And then use this variable in the view instead of calling Technol.all second time:

<% @all_technols.each do |technol| %> 
  your code without changes here
<% end %>

Ruby on Rails：重新排序checkbox标签

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