ruby-on-rails-4 - ActiveAdmin 嵌套表单多选

Question

我正在尝试通过产品表单更新 product_suppliers。该表单显示供应商表中的所有供应商，但不更新连接表。不确定错误在哪里。索引和显示显示正确的详细信息，但编辑不会更新连接表。开始在这个上绕来绕去。

更新:将表格更改为下面的内容让我很接近。但仍然没有更新连接表。但是，如果我手动将行添加到连接表，删除会按预期工作。它们显示并且可以被删除。保存将新的 product_id 添加到行中，而不是关联的 supply_company_id 值。我认为这是一个属性问题，但我看不到它。

应用程序/模型/product.rb

 class Product < ActiveRecord::Base
   ### shortned for clarity
  has_many :product_suppliers, :foreign_key => 'product_id'
  has_many :supply_companies, :through => :product_suppliers
  accepts_nested_attributes_for :product_suppliers, :allow_destroy => true
 end

应用程序/模型/supply_company.rb

 class SupplyCompany < ActiveRecord::Base
  has_many :products, :through => :product_suppliers
  has_many :product_suppliers, :foreign_key => 'supply_company_id'
 end

应用程序/模型/product_supplier.rb

class ProductSupplier < ActiveRecord::Base
 belongs_to :product
 belongs_to :supply_company
 accepts_nested_attributes_for :product
 accepts_nested_attributes_for :supply_company
end

/app/admin/product.rb

ActiveAdmin.register Product do

  # See permitted parameters documentation:
  # https://github.com/activeadmin/activeadmin/blob/master/docs/2-resource-customization.md#setting-up-strong-parameters
  #
   permit_params :id, :product_name, :product_description, :product_type_id, :product_category_id, :product_colour_id, :product_size_id,
                             product_images_attributes: [:id, :product_id, :product_image, :_destroy],
                             product_types_attributes: [:id, :product_type],
                             product_catergories_attributes: [:id, :product_category],
                             product_colour_attributes: [:id, :product_colour],
                             product_size_attributes: [:id, :product_size],
                             product_suppliers_attributes: [:id, :product_id, :supply_company_id, :_destroy],
                             supply_companies_attributes: [:id, :company_name]

   form(:html => {:multipart => true}) do |f|
     f.inputs "Product Details" do
       f.input :id
       f.input :product_name
       f.input :product_description

#######################################################################
# Problem Lies with this piece of code Not saving the supply_company_id
# when adding a new row or updating the old rows. Delete works fine.
# cant see the error in models or permited_params.......
#######################################################################

             f.inputs "Suppliers" do
       f.has_many :product_suppliers do |ff|
      ff.input :supply_company_id, as: :select, multiple: true, collection: SupplyCompany.all.map {|u| [u.company_name.to_s, u.id]}
      ff.input :_destroy, :as=>:boolean, :required => false, :label => 'Remove supplier'
     end
    end

   ######################################################## 

       f.input :product_type_id, :as => :select, :collection => ProductType.all.map {|u| [u.product_type.to_s, u.id]}
       f.input :product_category_id, :as => :select, :collection => ProductCategory.all.map {|u| [u.product_category.to_s, u.id]}
       f.input :product_colour_id, :as => :select, :collection => ProductColour.all.map {|u| [u.product_colour.to_s, u.id]}
       f.input :product_size_id, :as => :select, :collection => ProductSize.all.map {|u| [u.product_size.to_s, u.id]}
       end

       f.inputs "Product images" do
         f.has_many :product_images do |p|
           p.input :product_image, :as => :file, :label => "Image",:hint => image_tag(p.object.product_image.url(:thumb))
           p.input :_destroy, :as=>:boolean, :required => false, :label => 'Remove image'
         end
       end
        f.actions
   end

product_suppliers_schema

 create_table "product_suppliers", force: true do |t|
    t.integer  "product_id"
    t.integer  "supply_company_id"
    t.datetime "created_at"
    t.datetime "updated_at"
  end

更新:
将表格更改为下面的内容让我很接近。但仍然没有更新连接表。但是，如果我手动将行添加到连接表，删除会按预期工作。它们显示并且可以被删除。
保存将新的 product_id 添加到行中，而不是关联的 supply_company_id 值 .我认为这是一个属性问题，但我看不到它。

   f.inputs "Suppliers" do
       f.has_many :product_suppliers do |ff|
      ff.input :supply_company_id, as: :select, multiple: true, collection: SupplyCompany.all.map {|u| [u.company_name.to_s, u.id]}
      ff.input :_destroy, :as=>:boolean, :required => false, :label => 'Remove supplier'
 end
end

Answer 1

原来它是代码中的 multipart::true 。一旦我从下面的代码中删除它，一切都按预期工作。

       form(:html => {:multipart => true}) do |f|
       f.inputs "Product Details" do
       f.input :id
       f.input :product_name
       f.input :product_description
       f.has_many :product_supply_companies do |ff|
       ###############################################
       #REMOVED multipart: :true from the line below
       ###############################################
         ff.input :supply_company_id, as: :select,  collection: SupplyCompany.all.map {|u| [u.company_name.to_s, u.id]} 
         ff.input :_destroy, :as=>:boolean, :required => false, :label => 'Remove supplier'
       end
       f.input :product_type_id, :as => :select, :collection => ProductType.all.map {|u| [u.product_type.to_s, u.id]}
       f.input :product_category_id, :as => :select, :collection => ProductCategory.all.map {|u| [u.product_category.to_s, u.id]}
       f.input :product_colour_id, :as => :select, :collection => ProductColour.all.map {|u| [u.product_colour.to_s, u.id]}
       f.input :product_size_id, :as => :select, :collection => ProductSize.all.map {|u| [u.product_size.to_s, u.id]}
       end

        f.inputs "Product images" do
         f.has_many :product_images do |p|
           p.input :product_image, :as => :file, :label => "Image",:hint => image_tag(p.object.product_image.url(:thumb))
           p.input :_destroy, :as=>:boolean, :required => false, :label => 'Remove image'
         end
       end
        f.actions
   end