RoR：子记录列表

Question

架构：

• 人员（身份证、姓名、出生年份、性别）

• 宠物（id，person_id，名称，leg_count）

• 植物（id，person_id，种类，数量）

我想制作一份关于按人员分组的这些事物的只读报告。人员清单已完成（没有相关记录）。我想要每人都有“子表”。例如：

Persons
+----+------+-----------+--------+
| id | name | birthyear | gender |
+----+------+-----------+--------+
|  1 | Joe  | 1980      | M      |
+----+------+-----------+--------+
| Pets                           |
| +----+------+-----------+      |
| | id | name | Leg count |      |
| +----+------+-----------+      |
| |  1 | Rex  |         4 |      |
| +----+------+-----------+      |
| |  2 | Ka   |         0 |      |
| +----+------+-----------+      |
| Plants                         |
| +----+------------+-----+      |
| | id | kind       | qty |      |
| +----+------------+-----+      |
| |  1 | lemon tree |   2 |      |
| +----+------------+-----+      |
+----+------+-----------+--------+
|  2 | Jane | 1982      | F      |
+----+------+-----------+--------+
| Pets                           |
| +----+------+-----------+      |
| | id | name | Leg count |      |
| +----+------+-----------+      |
| |  3 | Sue  |         6 |      |
| +----+------+-----------+      |
| Plants                         |
| +----+------------+-----+      |
| | id | kind       | qty |      |
| +----+------------+-----+      |
| |  2 | Oak tree   |   1 |      |
| +----+------------+-----+      |
+----+------+-----------+--------+

您能帮我提供一些在何处以及如何连接到框架的提示吗？ （JRuby（1.5.0），Ruby on Rails（2.3.4），ActiveRecord（2.3.4））

做了什么

Persons
+----+------+-----------+--------+
| id | name | birthyear | gender |
+----+------+-----------+--------+
|  1 | Joe  | 1980      | M      |
+----+------+-----------+--------+
|  2 | Jane | 1982      | F      |
+----+------+-----------+--------+

它是使用以下方式完成的：

class PersonsReportController < PersonsController
  layout 'simpreport'
  active_scaffold :person do |config|
    c.columns = [:name, :birthyear, :gender, :pets, :plants ]
    c.label = "Report of people and other living creatures"
    [:pets, :plants].each do |col| 
        columns[col].clear_link
    end
    c.list.columns.exclude :pets, :plants
    c.actions.exclude :show
  end
  # ...
end

而且我还自定义了_list_header.rhtml< /code>、_list_column_headings.rhtml 和 _list_actions.rhtml 一点点，以消除所有交互性（如排序等）。

Answer 1

我不明白你在控制器中编写的代码，也不明白为什么它继承自你的 PersonsController。也许你可以多解释一下你想在那里完成什么？

话虽这么说，我会这样解决你的问题：

Models:

person.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

pet.rb:

class Pet < ActiveRecord::Base
  belongs_to :person
end

plant.rb:

class Plant < ActiveRecord::Base
  belongs_to :person
end

Controller:

reports_controller.rb:

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

View ：

报告/index.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>

Answer 2

这是在 ActiveScaffold 中工作的解决方案：

app/controllers/people_controller.rb

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，子表折叠起来，因此我们必须使用 event.simulate.js 来自 远大的。

下载 protolicious 并将 event.simulate.js 复制到您的 public/javascripts 目录。

现在，在布局中包含 event.simulate.js：

<%= 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

app/models/person.rb

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

app/models/pet.rb

class Pet < ActiveRecord::Base
  belongs_to :person
end

app/models/plant.rb

class Plant < ActiveRecord::Base
  belongs_to :person
end