按form_for中的属性分组

时间:2011-08-03 15:14:34

标签: ruby-on-rails group-by preferences block form-for

我正在开发一个Rails项目,该项目需要不同用户类型的首选项,具体取决于哪个shool。因此,我有这些模型:

class Preference < ActiveRecord::Base

  belongs_to :school
  belongs_to :privilege
  belongs_to :user_type

end

class Privilege < ActiveRecord::Base

  has_many :preferences

end

所以在我看来,我希望编辑给定学校的偏好,我希望按用户类型分开和排序。例如,我的完成视图将如下所示:

    <form accept-charset="UTF-8" action="/preferences/edit" method="post">
        <table>
            <thead>
                    <td>Pivilege</td>
                    <td>Allowed</td>
                </thead>
                <tbody>
                <h2>Student User type</h2>
                <tr>
                    <td>Privilege 1<td>
                    <td>checkbox for privilege 1<td>
                </tr>
<tr>
                    <td>Privilege 2<td>
                    <td>checkbox for privilege 2<td>
                </tr>
                <h2>Employee User type</h2>
                <tr>
                    <td>Privilege 1<td>
                    <td>checkbox for privilege 1<td>
                </tr>
<tr>
                    <td>Privilege 2<td>
                    <td>checkbox for privilege 2<td>
                </tr>               
            </tbody>    
        </table>
    </form>

问题是我不知道如何在(form_for @preferences do |f|)块内进行itarate并按user_types对此数组(@preferences)进行分组。

任何人都可以帮助我吗? Thanxs提前

1 个答案:

答案 0 :(得分:0)

我最终使用嵌套属性并验证首选项是否属于该用户类型(尽管我坚持认为应该有更多“Rails方式”)。希望这有助于某人:

<%= form_for @school, :url => {:controller => :preferences, :action => :update, :id => @school.id} do |f| %>
        <h2>Change Preferences</h2>     
    <% UserType.all.each do |ut|%>
         <h3><%= ut.name%></h3>
            <table>

                <thead>
                    <td>Privilege</td>
                    <td>Allowed</td>
                </thead>

                <tbody>

                <%= f.fields_for :preferences do |pref| %>
                  <% if pref.object.user_type == ut%>
                    <tr>
                      <td><%= pref.object.privilege.name%></td>
                      <td><%= pref.check_box :allowed, {:allowed => pref.object.allowed} %></td>
                    </tr>
                  <% end %>
                <% end%>
                </tbody>    

          </table>      
    <% end %>