Ruby on Rails：将一个模型的2个引用添加到另一个模型 [英] Ruby on rails: Adding 2 references of a single model to another model

问题描述

我想知道在Rails 4.0上的红宝石中实现我的情况的正确方法。

I'd like to know a proper way to implement my situation here in ruby on rails 4.0.

让我们说我有2个名为 House 和 Order 。

Lets say I have 2 models named House and Order.

我的订单表应具有两列 from 和 to 都引用房屋模型。

My Order table should have two columns from and to both referencing a house model.

在这种情况下，这两个模型之间的关系应该是什么？
注意：我不需要从房屋模型中引用任何订单模型。

What should my relations between these two models be in this case? Note: I do not require any reference to order model from house model.

我想在其中添加类似的东西我的订单表

I would like to have something like this in my Order table

t.references :house, as:from (this should create a column named from and should be of type integer, index of house table
t.references :house, as:to (this should create a column named to and should be of type integer, index of house table

我希望在订单模型中使用这种类型的关系，因为我想以订单的形式获取房屋领域，例如

I would like this type of relation in order model because I want to take fields of houses in my order form something like

<%= form_for @order do |f| %>
  ... # order fields
  <%= f.fields_for :house(from) do |i| %>
    ... # your house forms
  <% end %>
  <%= f.fields_for :house(to) do |i| %>
    ... # your house forms
  <% end %>
  ...
<% end %>

有没有特定的方法可以

P.S：我已经在这里阅读过这篇文章，但是我认为它不能完全解决我的问题。
向现有Rails模型添加模型引用

P.S : I have already read this post here but I think it does not exactly solve my problem. Adding a Model Reference to existing Rails model

推荐答案

在创建订单迁移文件中：

In create orders migration file:

create_table :orders do |t|
  ..
  t.integer :from_house_id
  t.integer :to_house_id
  ..
end

在您的应用/模型/订单中。rb：

In your app/models/order.rb:

belongs_to :from_house, class_name: 'House'
belongs_to :to_house, class_name: 'House'

accepts_nested_attributes_for :from_house, :to_house

在您看来：

<%= form_for @order do |f| %>
  ... # order fields
  <%= f.fields_for :from_house do |i| %>
    ... # your from house forms
  <% end %>
  <%= f.fields_for :to_house do |i| %>
    ... # your to house forms
  <% end %>
  ...
<% end %>

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