ruby-on-rails - 为什么嵌套表单在 Rails 中返回编译错误？

Question

我有两个模型：newsavedmap 和航点。

我的新闻保存地图：

    class Newsavedmap < ActiveRecord::Base
        has_many :waypoints, :dependent => :destroy
        accepts_nested_attributes_for :waypoints
    end

该表单位于 maptry.html.erb 上

    <% form_for @newsavedmap, :html=>{:id=>'createaMap'} do |f| %>
<%= f.error_messages %>
<%= f.text_field :name, {:id=>"savemap_name", :size=>30, :value=>"New Map"}%></p>

     <%= f.fields_for :waypoints do |p| %>
    <%= p.select :waypoint, itinerary.locations_for_select,{},{ :multiple=>"true", :id=>"waypoints", :class=>"mobile-waypoints-remove"}%>   
    <% end %>
    <% end %>

出于某种原因，这会引发以下错误：

    ActionView::TemplateError (compile error .../maptry.html.erb:392: syntax error, unexpected ')'        
    ...ields_for :waypoints do |p| ).to_s); @output_buffer.concat ...

谢谢你的尽心帮助！

Rails 2 的最终工作版本

    <% f.fields_for @waypoints do |p| %>
    <%= p.select :waypoint, {},{}, :multiple=>"true", :id=>"waypoints", :class=>"mobile-waypoints-remove" %>      
    <% end %>

Answer 1

在开始嵌套表单之前，您将结束 form_for

试试下面的代码

<% form_for @newsavedmap, :html=>{:id=>'createaMap'} do |f| %>
  <%= f.error_messages %>
  <%= f.text_field :name, {:id=>"savemap_name", :size=>30, :value=>"New Map"}%></p>


<%= f.fields_for :waypoints do |p| %>
    <%= p.select :waypoint, itinerary.locations_for_select,{},{ :multiple=>"true", :id=>"waypoints", :class=>"mobile-waypoints-remove"}%>   
<% end %>
<% end %>