Rails 3更改数据时切换菜单重新加载页面

Question

用户可以编辑他的帐户，并有一个菜单来选择他的社区：

<%= form_for @user, :html => { :multipart => true } do |f| %>
    <%= f.collection_select :community_id, Community.find(:all,
    :include => :memberships,
    :conditions => ['memberships.user_id = ? and memberships.role > ?', @user.id, '0' ]),
    :id,
    :name,
    :style => "width: 200px;" %>
<% end %>

我想将此菜单放在显示页面上，并让他可以直接切换。

在rails 2中，我使用了observe_field或:onchange => 'this.form.onsubmit()' 我不知道java…

Answer 1

<%= form_for @user, :remote => true do |f| %>
<%= f.collection_select :community_id,
Community.where('memberships.user_id = ? and memberships.role > ?', @user.id, '0').includes(:memberships), :id, :name,{},
:onchange => "this.form.submit();" %>   
<% end %>

将 'this.form.onsubmit() 更改为 'this.form.submit()