简单表单 - 选择集合并设置has_many

Question

如何显示产品分为三个部分（三个不同的过滤器，如：product_1，product_2，product_3），并且只需要从每个部分中选择一个产品

提交后。我应该为一个订单保存所有这些产品。

我有4张桌子：用户订单Order_details产品

class Order < ActiveRecord::Base
  has_many :order_details
  belongs_to :user
  has_many :products, through: :order_details
  accepts_nested_attributes_for :order_details
end
class OrderDetail < ActiveRecord::Base
 belongs_to :order
 belongs_to :product
end
class Product < ActiveRecord::Base
  has_many :order_details
  has_many :orders, through: :order_details
  def self.get_first_course
    Product.where(product_type: "exem_product_1")
  end
  def self.get_main_course
    Product.where(product_type: "exem_product_2")
  end
  def self.get_drink
    Product.where(product_type: "exem_product_3")
  end
end

我不确定如何为这种情况编写强大的参数以及如何创建用于保存数据的对象。

class OrdersController < ApplicationController
 before_action :authenticate_user!
 def index
   @order = Order.new
   #I think need something like this..?!
   #@order.order_details.build
 end
 def create
 end
 private
 def order_params
   params.require(:order).permit(:date, :product_id => [])
 end
end

Answer 1

您可以在控制器中执行以下操作：

class OrdersController < ApplicationController
 before_action :authenticate_user!
 def index
   @order = Order.all
 end
 def new
   @order = Order.new
 end
 def create
   @order = current_user.orders.new(order_params)
   if @order.save
    #your actions here
   else
    #your actions to rescue error
   end
 end
 private
 def order_params
   params.require(:order).permit(:date, :product_id => [])
 end
end

要对单选按钮集合使用简单表单，您必须执行以下操作：

= simple_form_for(@order, html: {:class => 'well form-horizontal', :method  => :post, :action=> :create }) do |f|
 .col-xs-12.col-sm-6.col-md-8
   = render 'shared/error_messages', object: f.object
   = f.collection_radio_buttons :product_ids, Product.get_first_course, :id, :product_name, :item_wrapper_class => 'inline'
   %hr
   = f.collection_radio_buttons :product_ids, Product.get_main_course, :id, :product_name, :item_wrapper_class => 'inline'
   %hr
   = f.collection_radio_buttons :product_ids, Product.get_drink, :id, :product_name,,:item_wrapper_class => 'inline'
   %hr
   = f.association :products, as: :radio_buttons
   = f.button :submit, class: "btn btn-primary"

Answer 2

用于选择集合并从表单中获取 3 个不同的 ID，这对我有用。

发布：~ products_ids => {数组 ID}

= simple_form_for @order do |f|
 = render 'shared/error_messages', object: f.object
 = simple_fields_for :product_ids do |product|
   = product.collection_select(nil, Product.get_first_course, :id, :product_name,
                              {prompt: "Select first course" },class: "form-control product-select")
   = product.collection_select(nil, Product.get_main_course, :id, :product_name,
                          {prompt: "Select first course"},class: "form-control product-select")