Ruby on rails 有没有办法隐藏模型中的一些嵌套对象？

我有一些带有嵌套项目的订单，这些项目有嵌套类型。当我在视图中为@order执行

表单时，我想隐藏其
：registed
属性设置为true

<% form_for @order do |f| %>
  <% f.fields_for :items do |ff| %>
    <%# show all the items that have :registered == false %>
  <% end %>
<% end %>

您可以尝试以下方法：

<% form_for @order do |f| %>
  <% f.fields_for :items do |ff| %>
    <% next if ff.object.registered %>
    <%# show all the items that have :registered == false %>
  <% end %>
<% end %>

<% form_for @order do |f| %>
  <% f.fields_for :unregistered_items do |ff| %>
    <%# show all the items that have :registered == false %>
  <% end %>
<% end %>



或者，您可以为未注册的项目创建第二个关联：

class Order < ActiveRecord::Base
  has_many :unregistered_itmes, :class_name => "Item", :conditions => { :registered => false } 
end

类顺序“Item”，：conditions=>{:registered=>false}
结束

然后你可以这样做：

<% form_for @order do |f| %>
  <% f.fields_for :items do |ff| %>
    <% next if ff.object.registered %>
    <%# show all the items that have :registered == false %>
  <% end %>
<% end %>

<% form_for @order do |f| %>
  <% f.fields_for :unregistered_items do |ff| %>
    <%# show all the items that have :registered == false %>
  <% end %>
<% end %>