Question

我的模特：

class LineItem < ActiveRecord::Base
  attr_accessible :itemable
  belongs_to :itemable, polymorphic: true

  belongs_to :lead
  belongs_to :cart


end

class House < ActiveRecord::Base
  has_many :line_items, :as => :itemable
end

class Appartment < ActiveRecord::Base
  has_many :line_items, :as => :itemable
end

line_item_controller：

def create
      @line_item = @cart.line_items.build item: @object
      respond_to do |format|
        if @line_item.save
          format.html { redirect_to @line_item.cart,
            notice: 'Vakantiehuis toegevoegd in lijst.' }
          format.json { render action: 'show',
            status: :created, location: @line_item }
        else
          format.html { render action: 'new' }
          format.json { render json: @line_item.errors,
            status: :unprocessable_entity }
        end
      end
   end

private
    def create_object
      id = params[:house_id] || params[:appartment_id]

      model = "House" if params[:house_id]
      model = "Apartment" if params[:apartment_id]
      model = model.constantize

      @object = model.find(id)
   end

创建新项目列表时，不会保存de table line_items（itemable_id，itemable_type）中的值。我在这做错了什么？ thanks..remco

Answer 1

尝试替换：

@cart.line_items.build item: @object

为：

@cart.line_items.build itemable: @object

多态关联不保存值

1 个答案: