如何在Rails上同時在兩個模型上爲has_one創建新記錄？

Question

我需要爲屬於同一模型的兩個模型創建新記錄。

這是我的模型

class Promotion < ApplicationRecord 
    has_one :promotion_thai ,dependent: :destroy 
    has_one :promotion_eng ,dependent: :destroy 
end 

class PromotionThai < ApplicationRecord 
    belongs_to :promotion 

    mount_uploader :long_banner, PromotionImageUploader 
    mount_uploader :square_banner, PromotionImageUploader 
    mount_uploader :details_image, PromotionImageUploader 

    validates :promotion_id, presence: true 
    validates :title, presence: true 
    validates :description, presence: true 

    #validates :long_banner, presence: true 
    #validates :square_banner, presence: true 

end 

class PromotionEng < ApplicationRecord 
    belongs_to :promotion 

    mount_uploader :long_banner, PromotionImageUploader 
    mount_uploader :square_banner, PromotionImageUploader 
    mount_uploader :details_image, PromotionImageUploader 

    validates :promotion_id, presence: true 
    validates :title, presence: true 
    validates :description, presence: true 

    validates :long_banner, presence: true 
    validates :square_banner, presence: true 

end 

這是我的控制器方法

def create 
    promotion = Promotion.new 
    promotion.build_promotion_eng(promotion_eng_params).build_promotion_thai(promotion_thai_params) 

    if promotion.save 
     flash[:success] = 'Success Created Promotion' 
     redirect_to admins_promotions_path 
    else 
     errors_message = promotion.errors.full_messages.join(', ') 

     redirect_to admins_promotion_new_path, :flash => { :error => errors_message } 
    end 
    end 

然後當我提交表單，我總是得到這個錯誤

undefined method `build_promotion_thai' for #<PromotionEng:0x007f9fdbcb0250> Did you mean? build_promotion 

在此行中

promotion.build_promotion_eng(promotion_eng_params).build_promotion_thai(promotion_thai_params) 

我該如何解決這類問題？

謝謝！

Answer 1

這是因爲build_promotion_eng(promotion_eng_params)返回一個PromotionEng實例。

這應該很好。

promotion.build_promotion_eng(promotion_eng_params) 
promotion.build_promotion_thai(promotion_thai_params)