子记录列表

我不明白您在控制器中编写的代码,也不明白它为什么继承自PersonsController。也许你可以再解释一下你想在那里完成什么?

也就是说,我会这样解决你的问题:

个人.rb:

class Person < ActiveRecord::Base
  has_many :pets
  has_many :plants

  def has_pets?
    self.pets.size > 0
  end

  def has_plants?
    self.plants.size > 0
  end

  def has_pets_or_plants?
    self.has_pets? || self.has_plants?
  end
end

宠物.rb:

class Pet < ActiveRecord::Base
  belongs_to :person
end

class Plant < ActiveRecord::Base
  belongs_to :person
end

报告_控制器.rb:

class ReportsController < ApplicationController
  def index
    @persons = Person.find(:all)
  end
end

查看:

报告/索引.html.erb:

Persons
<table border="1">
  <tr>
    <td>id</td>
    <td>name</td>
    <td>birthyear</td>
    <td>gender</td>
  </tr>
<% @persons.each do |person| -%>
  <tr>
    <td><%= person.id %></td>
    <td><%= person.name %></td>
    <td><%= person.birthyear %></td>
    <td><%= person.gender %></td>
  </tr>
<% if person.has_pets_or_plants? -%>
  <tr>
    <td colspan="4">
    <% if person.has_pets? -%>
      Pets
      <table border="1">
        <tr>
          <td>id</td>
          <td>name</td>
          <td>leg count</td>
        </tr>
      <% person.pets.each do |pet| -%>
        <tr>
          <td><%= pet.id %></td>
          <td><%= pet.name %></td>
          <td><%= pet.leg_count %></td>
        </tr>
      <% end -%>
      </table>
    <% end -%>
    <% if person.has_plants? -%>
      Plants
      <table border="1">
        <tr>
          <td>id</td>
          <td>kind</td>
          <td>qty</td>
        </tr>
      <% person.plants.each do |plant| -%>
        <tr>
          <td><%= plant.id %></td>
          <td><%= plant.kind %></td>
          <td><%= plant.qty %></td>
        </tr>
      <% end -%>
      </table>
    <% end -%>
    </td>
  </tr>
<% end -%>
<% end -%>
</table>

下面是一个在ActiveScaffold中工作的解决方案:

class PeopleController < ApplicationController
  active_scaffold :person do |config|
    config.label = "Report of people and other living creatures"
    config.actions.exclude :show, :delete, :edit
    # this sets up clickable links for pets and plants.
    # clicking either link will expand BOTH child object collections.
    config.columns[:pets].set_link('nested', :parameters => {:associations => "pets plants"})
    config.columns[:plants].set_link('nested', :parameters => {:associations => "pets plants"})

    #    uncomment these if you want to allow editing of pets and plants
    #    config.nested.add_link("Person's pets", [:pets])
    #    config.nested.add_link("Person's plants", [:plants])
  end
end

现在报表打开时子表已折叠,因此我们必须使用 event.simulate.js protolicious .

现在包括事件.simulate.js在布局中:

<%= javascript_include_tag :defaults %>
<%= javascript_include_tag "event.simulate.js" %>
<%= active_scaffold_includes %>

并将此脚本标记添加到视图的底部:

<script type="text/javascript">
  // iterates through each ActiveScaffold nested item link and clicks it
  $$('a.nested').each(function(link, index) {
    link.simulate('click');
  });
</script>

给定以下模型

应用程序/模型/个人.rb

class Person < ActiveRecord::Base
  has_many :pets
  has_many :plants
end

应用程序/模型/宠物.rb

class Pet < ActiveRecord::Base
  belongs_to :person
end

应用程序/模型/植物.rb

class Plant < ActiveRecord::Base
  belongs_to :person
end