3
我想通過使用fields_for方法從一個表單構建兩個模型。我的代碼如下所示:Rails:包含fields_for表單助手的索引
<% for scale in @event.scales %>
<% f.fields_for "scale[]", scale do |scale_form| %>
<p>
Scale<br />
<%= scale_form.label :name %>
<%= scale_form.text_field :name %>
<%= scale_form.label :price %>
<%= scale_form.text_field :price %>
</p>
<% end %>
<% end %>
但遺憾的是輸出HTML缺少鱗片的ID:
<p>
Scale<br />
<label for="event_scale__name">Name</label>
<input id="event_scale__name" name="event[scale][][name]" size="30" type="text" />
<label for="event_scale__price">Price</label>
<input id="event_scale__price" name="event[scale][][price]" size="30" type="text" />
</p>
...
下面是相應的控制器和模型:
class EventsController < ApplicationController
...
def new
@event = Event.new
@providers = Provider.find(:all, :order => :name)
3.times { @event.scales.build }
respond_to do |format|
format.html
end
end
...
end
class Event < ActiveRecord::Base
has_many :scales
...
end
我是什麼做錯了?