RoR：通过孩子创建父母(RoR: Create parent through child)

 我是新手，并且一直在努力解决以下问题。 不幸的是，数小时的搜索还没有找到解决方案，所以我很乐意得到你的意见。 
 
 在创建订单时，我尝试创建客户端（作为父级）和订单项（作为子级）。 后者工作正常。 但是，在保存订单时，订单和客户都存储在数据库中，但* client_id *未传递到订单记录。 
 
 以下是我的代码： 
 
 公司模式 
 
class Company < ActiveRecord::Base

  has_many :orders,     foreign_key: "client_id"
  accepts_nested_attributes_for :orders

  validates :name, 
            :presence => true,
            :uniqueness => { :case_sensitive => false } 

  validates_associated  :users,
                        :orders

  attr_accessible :name, 
                  :account, 
                  :users_attributes,
                  :orders_attributes,  
                  :company_id
end
 
 订单模型 
 
class Order < ActiveRecord::Base

    has_many :order_items
    accepts_nested_attributes_for   :order_items

    belongs_to  :client, class_name: "Company",
                                    foreign_key: "id"
    accepts_nested_attributes_for   :client

    attr_accessible :order_items_attributes,
                    :order_number,
                    :client_attributes,
                    :client_id

    validates_associated    :order_items

    validates_presence_of   :order_number
                            :client_id
end
 
 订单控制器 
 
  def create
    @order = @client.orders.build(params:[orders])
    puts @order.to_yaml

    respond_to do |format|

      if @order.save!
        format.html { redirect_to @order, notice: 'Order was successfully created.' }
        format.json { render json: @order, status: :created, location: @order }
      else
        format.html { render action: "new" }
        format.json { render json: @order.errors, status: :unprocessable_entity }
      end
    end
  end
 
 新订单 
 
<%= simple_form_for @order, :html => { :class => 'form-horizontal' } do |f| %>
    <%= render 'shared/error_messages', :object => @order %> 
  <div class = "span3">
    <%= f.simple_fields_for :client do |client_builder| %>
      <%= client_builder.input  :name, 
                                :label => 'Client' %>
    <% end %>

    <%= f.input :order_number %>
    <%= f.simple_fields_for :order_items do |items_builder| %>
        <%= items_builder.input :reference_number %>
        <%= items_builder.input :item_description %>
    <% end %>

    <%= f.button  :submit,
                  :class => 'btn'%>
    <%= link_to t('.cancel', :default => t("helpers.links.cancel")),
                              orders_path, :class => 'btn' %>
  </div>
<% end %>
 
 感谢您的帮助！ 斯特凡 

I am new to rails and keep struggling with the following issue. Unfortunately, hours of search have not led to a solution, so I would be more than happy to get your input.
 
On creating an order, I attempt to create a client (as parent) and order items (as child). The latter works fine. However, on saving the order, both order and client are stored in the database with the exception that the *client_id* is not passed to the order record. 
 
Here follows my code:
 
Company Model
 
class Company < ActiveRecord::Base

  has_many :orders,     foreign_key: "client_id"
  accepts_nested_attributes_for :orders

  validates :name, 
            :presence => true,
            :uniqueness => { :case_sensitive => false } 

  validates_associated  :users,
                        :orders

  attr_accessible :name, 
                  :account, 
                  :users_attributes,
                  :orders_attributes,  
                  :company_id
end
 
Order Model
 
class Order < ActiveRecord::Base

    has_many :order_items
    accepts_nested_attributes_for   :order_items

    belongs_to  :client, class_name: "Company",
                                    foreign_key: "id"
    accepts_nested_attributes_for   :client

    attr_accessible :order_items_attributes,
                    :order_number,
                    :client_attributes,
                    :client_id

    validates_associated    :order_items

    validates_presence_of   :order_number
                            :client_id
end
 
Orders Controller
 
  def create
    @order = @client.orders.build(params:[orders])
    puts @order.to_yaml

    respond_to do |format|

      if @order.save!
        format.html { redirect_to @order, notice: 'Order was successfully created.' }
        format.json { render json: @order, status: :created, location: @order }
      else
        format.html { render action: "new" }
        format.json { render json: @order.errors, status: :unprocessable_entity }
      end
    end
  end
 
New Order Form
 
<%= simple_form_for @order, :html => { :class => 'form-horizontal' } do |f| %>
    <%= render 'shared/error_messages', :object => @order %> 
  <div class = "span3">
    <%= f.simple_fields_for :client do |client_builder| %>
      <%= client_builder.input  :name, 
                                :label => 'Client' %>
    <% end %>

    <%= f.input :order_number %>
    <%= f.simple_fields_for :order_items do |items_builder| %>
        <%= items_builder.input :reference_number %>
        <%= items_builder.input :item_description %>
    <% end %>

    <%= f.button  :submit,
                  :class => 'btn'%>
    <%= link_to t('.cancel', :default => t("helpers.links.cancel")),
                              orders_path, :class => 'btn' %>
  </div>
<% end %>
 
Thanks for your help in advance! Stefan

原文：https://stackoverflow.com/questions/19877012