简单形式- select 收集和设置 has_many 通过

Question

如何将产品分为三部分（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产品。

我有 4 张桌子：用户命令 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

你可以在你的控制器中做这样的事情：

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

要使用单选按钮集合的简单形式，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

对于 select 集合并从表单中获取 3 个不同的 ID，这对我有用..

post: ~ 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")

简单形式- select 收集和设置 has_many 通过

Simple form- select collection and set up has_many through

ruby-on-rails

ruby-on-rails-4

simple-form

has-many-through

fields-for