Question

我正在使用http://guides.rubyonrails.org/来学习ruby＆amp;轨道。加入三个表我有问题。，所以我做了一个新项目作为这个例子：http://guides.rubyonrails.org/association_basics.html#the-has_many_through-association我有三个表医生，约会＆amp;患者

型号：

physician.rb

class Physician < ActiveRecord::Base
    has_many :appointments
    has_many :patients, :through => :appointments
  attr_accessible :name
end

appointment.rb

class Appointment < ActiveRecord::Base
    belongs_to :physician
    belongs_to :patient
  attr_accessible :appointment_date, :patient_id, :physician_id
end

patient.rb

class Patient < ActiveRecord::Base
    has_many :appointments
    has_many :physicians, :through => :appointments
  attr_accessible :name
end

我想显示患者姓名，医生姓名和姓名。约会日期。这该怎么做。提前谢谢。

Answer 1

我相信，虽然我不确定，但您正在寻找在视图中访问对象及其关联的方法。那是对的吗？

我将使用约会模型给你一个例子。

AppointmentsController

class AppointmentsController < ApplicationController
  def index
    @appointments = Appointment.includes(:physician, :patient).order(:appointment_date)
  end
end

约会#index（Haml语法）

%ul
  - @appointments.each do |appointment|
    %li
      = appointment.appointment_date
      %br
      %strong Physician:
      = link_to appointment.physician.name, appointment.physician
      %br
      %strong Patient:
      = link_to appointment.patient.name, appointment.patient

这将为您提供约会列表及其日期，医生和患者。

这是你正在寻找的那种帮助吗？

Answer 2

在预约控制器中：

def index
   @appointments = Appointment.order("appointment_date DESC")
end

在约会#index

中

<% for appointment in @appointments %>

          <%= link_to appointment.patient.name, patients_path(appointment.patient) %>
          &nbsp;
          Appointment for
          &nbsp;
          <%= link_to appointment.physician.name, physician_path(appointment.physician) %>
          <% if appointment.appointment_date? %>

              <%= appointment.appointment_date %>
          <% end %>
  <% end %>

在Rails3中加入三个表

2 个答案: