如何分配对象的值＆gt;对象＆gt;在Rails中从我的控制器转换为变量？

Question

如果我没有准确地传达我的求助请求，我表示歉意。

我想要完成的是在选择appointments按钮后根据某些对象值将条目写入Book表。此设置中没有要收集的表单值。如果要点击Book按钮，它会收集tech.email，service.name的值以及service_type的某些值，然后将这些值写入{{1}表。

  

细分

     

  
1. 将appointments的值写入tech.email表。
  
2. 将分配给appointments的{​​{1}}的值写入service.name表格
  
3. 写入分配给特定的tech的所有值   分配给特定appointments的{​​{1}}   service_type表
  

简而言之，我如何捕获service的实例变量，以便我可以在tech视图中将其设置为appointments，service_type，{{1等等...？ 所有这些都发生在appointment

中

如果我将@service_type.name路径以菊花链形式连接，只是为了能够访问所有值。 @service_type.service.name（我希望所有@service_type.service.tech值都可访问）

  

Rails控制台
   如果我在控制台中执行以下操作。   tech_controller.rb，我可以做一个首选   反向菊花链方法：

     

service_type

我有以下内容：

宝石
@service_type = tech.first.service.first.service_type.first.
service_type

appointmentments.rb模型（富连接表）

service_type = ServiceType.first

tech.rb模型（带有技术列表的数据库 - 通过@service_type.service.tech.email gem注册）

devise: user signup

service.rb模型

cocoon: customizable nested objects

service_type.rb模型

class Appointment < ActiveRecord::Base
  belongs_to :customer
  belongs_to :tech
end

tech_controller.rb

devise

show.html.erb

    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 :appointments #unsure is this is necessary since has_many :through below
      has_many :customers, :through => :appointments
      has_many :services
      has_many :service_types      
    end

约会视图

    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

服务（包含带有服务主要类别列表的数据）

class ServiceType < ActiveRecord::Base
  #nested objects generated by cocoon gem

  belongs_to :service
  belongs_to :tech #added 5/27 unsure if needed
end

class TechsController < ApplicationController def index @techs = Tech.all @customer = Customer.all end def show @tech = Tech.find(params[:id]) @services = @tech.services.all end def new #@appointment = Appointment.new end def create @appointment = Appointment.new(params[:id]) #@appointment.booked_service = @tech.first.services.first.name - the vars below are just a mickey mouse hacked up example of the value I'm trying to obtain. @@appointment.booked_type = @tech.first.services.first.service_types.first.name @@appointment.booked_price = @tech.first.services.first.service_types.price #...etc #...etc #...etc @appointment.save redirect_to @appointment end def edit end def destroy end private # Never trust parameters from the scary internet, only allow the white list through. def appointment_params params.require(:appointment).permit(:booked_service, :booked_type, :booked_type_time_length, :booked_price, :customer_id, :tech_id) #params.require(:appointment).permit(:booked_service => :service, :booked_type, :booked_type_time_length, :booked_price, :customer_id, :tech_id) end end 引用 <tbody> <% @services.each do |service| %> <tr> <td><%= service.name %></td> <td> <table> <tr> <th>Name</th> <th>Time</th> <th>Price</th> <th>Book Appointment</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> <td><%= button_to 'Book', action: 'create' %></td> </tr> <%end%> </table> </td> </tr> <% end %> </tbody> db

中的记录

ServiceType（来自cocoon gem，允许我创建具有多个自定义属性的嵌套服务类型）

<h2>Thank you for booking your appointment!</h2>

 <b>Service:</b> <%= @appointment.id %><br>
 <b>Your Booked Service:</b> <%= @appointment.booked_service %><br>
 <b>Type selected:</b> <%= @appointment.booked_type %><br>
 <b>Length of service:</b> <%= @appointment.booked_type_time_length %><br>
 <b>Service Price:</b> <%= @appointment.booked_price %><br>
 <b>Service:</b> <%= @appointment.customer_id %><br>
 <b>Your Tech:</b> <%= @appointment.tech_id %>

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 | | +------------+--------------+------+-----+---------+----------------+ 引用tech_id db

中的记录

  

修改：点击按钮后添加错误 - 5/29 - 2:38 AM

返回的错误是：

tech

  

@service_type = Tech.find（params [：tech]）

如果需要进一步的详细信息，请与我们联系。

任何帮助将不胜感激。 感谢