在移動到Rails中的下一個對象之前，如何循環對象和它的嵌套對象？

Question

我是RoR的初學者。

我試圖做到的是可循環的service_types列表（剎車鼓，墊，等...）每service類（剎車）纔去到屬於每個高科技接下來service類別（懸浮液）。

我有以下的設置：

寶石
devise: user signup
cocoon: customizable nested objects

我認爲從我的服務/ show.html.erb

<tbody> 
    <% @services.each do |service| %> 
     <tr> 
     <td><%= service.name %></td> 
     <td><%= **??? Don't know how to cycle through to capture the tech's list `services` and `service types**` %> 
     </tr> 
    <% end %> 
    </tbody> 

---

服務.rb型號

class Service < ActiveRecord::Base 
    has_many :service_types 
    belongs_to :tech 

    accepts_nested_attributes_for :service_types, :reject_if => :all_blank, :allow_destroy => true 
end 

---

techs_controller.rb

class TechsController < ApplicationController 

    def index 
    @techs = Tech.all 
    @services = Service.all 

    end 

    def show 
    @tech = Tech.find(params[:id]) 
    @services = @tech.services.all 
    #@service_types = @service.service_types.all 
    end 
end 

---

技術。RB模型（分貝與科技股的列表 - 經由devise寶石註冊）

class Tech < ActiveRecord::Base 

    # Include default devise modules. Others available are: 
    # :confirmable, :lockable, :timeoutable and :omniauthable 
    devise :database_authenticatable, :registerable, 
     :recoverable, :rememberable, :trackable, :validatable 

    has_many :service_types 
    has_many :services 
    has_many :appointments 
    has_many :customers, :through => :appointments 
end 

---

編輯 - 5/25 [原因：複製粘貼錯誤/錯字]

服務（包含具有服務主要類別列表的數據）

mysql> describe services; 
+------------+--------------+------+-----+---------+----------------+ 
| Field  | Type   | Null | Key | Default | Extra   | 
+------------+--------------+------+-----+---------+----------------+ 
| id   | int(11)  | NO | PRI | NULL | auto_increment | 
| name  | varchar(255) | YES |  | NULL |    | 
| created_at | datetime  | NO |  | NULL |    | 
| updated_at | datetime  | NO |  | NULL |    | 
| tech_id | int(11)  | YES |  | NULL |    | 
+------------+--------------+------+-----+---------+----------------+ 

個

的tech_id引用在tech分貝記錄

服務類型（從繭中的寶石，讓我創建嵌套的業務類型與幾個自定義屬性）在services分貝

mysql> describe service_types; 
+-------------+--------------+------+-----+---------+----------------+ 
| Field  | Type   | Null | Key | Default | Extra   | 
+-------------+--------------+------+-----+---------+----------------+ 
| id   | int(11)  | NO | PRI | NULL | auto_increment | 
| name  | varchar(255) | YES |  | NULL |    | 
| description | varchar(255) | YES |  | NULL |    | 
| time  | varchar(255) | YES |  | NULL |    | 
| price  | decimal(8,2) | YES |  | NULL |    | 
| decimal  | decimal(8,2) | YES |  | NULL |    | 
| service_id | int(11)  | YES | MUL | NULL |    | 
| created_at | datetime  | NO |  | NULL |    | 
| updated_at | datetime  | NO |  | NULL |    | 
+-------------+--------------+------+-----+---------+----------------+ 

的service_id引用記錄

---

經過幾天的研究，最接近我來完成我想要的是這個fr OM我的觀點：以上

<tbody> 
    <% @services.each do |service| %> 
     <tr> 
     <td><%= service.name %></td> 
     <td><%= service.service_types.all.collect{|s| [s.name, s.time, s.price} %></td> 
     </tr> 
    <% end %> 
    </tbody> 
</table> 

產生這樣的：

Brakes [["Rotors", 1HR], ["Drums", 1HR]]

我正在尋找這個輸出是：

下面是我要找的輸出用於：

+---------+----------+-----+-------+ 
| Brakes | Type | Time | Price | 
+---------+--------+-------+-------+ 
      | Rotors | 1HR | 100 | 
      | Drums | 1HR | 100 | 

+-------------+----------+-----+-------+ 
| Suspension | Type | Time | Price | 
+-------------+--------+-------+-------+ 
       | Struts | 2HR | 100 | 
       | Shocks | 1HR | 100 | 

我想循環瀏覽service（制動器）及其所有嵌套service_types繼續前往下一個service類別（暫停）騎自行車。

任何幫助，將不勝感激。 感謝

Answer 1

<% @services.each do |service| %> 
     <tr> 
     <td><%= service.name %></td> 
     <td> 
      <table> 
      <tr> 
       <th>Name</th> 
       <th>Time</th> 
       <th>Price</th> 
      </tr> 
      <% service.service_types.each do |service_type| %> 
       <tr> 
       <td><%= service_type.name %></td> 
       <td><%= service_type.time %></td> 
       <td><%= service_type.price %></td> 
       </tr> 
      <%end%> 
      </table> 
     </td> 
     </tr> 
    <% end %> 

還有一件事

service_type_id

在服務表不是必需的。