如何在 Rails 上同时为两个模型在 has_one 上创建新记录？

Question

我需要用一种方法为属于同一模型的两个模型创建新记录。

这是我的模特

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

这是我的控制器方法

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

然后当我提交表格时我总是得到这个错误

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

这条线

promotion.build_promotion_eng(promotion_eng_params).build_promotion_thai(promotion_thai_params)

我该如何解决此类问题？

谢谢！

Answer 1

那是因为 build_promotion_eng(promotion_eng_params) returns 一个 PromotionEng 实例。

这应该可以正常工作。

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

如何在 Rails 上同时为两个模型在 has_one 上创建新记录？

How to created new record on has_one for two model on the same time on Rails?

ruby-on-rails

activerecord

has-one