ruby-on-rails - decent_exposure 每次创建双条目

Question

我正在为嵌套表单使用 decent_exposure gem 和 cocoon gem，每次创建或更新后我都会得到重复的条目。我究竟做错了什么？ X_X

Controller

class Admin::DealsController < ApplicationController
  expose :deals
  expose :deal, attributes: :deal_params

  def create
    if deal.save
      redirect_to [:admin, deal], notice: 'Deal was successfully created.'
    else
      render :new
    end
  end

  def update
    if deal.update(deal_params)
      redirect_to [:admin, deal], notice: 'Deal was successfully updated.'
    else
      render :edit
    end
  end

  private

  def deal_params
    params.require(:deal).permit :title, :end_date,
                                 deal_variants_attributes: [:id, :title, :description, :price, :discount, :_destroy]
  end
end

型号

class Deal < ActiveRecord::Base
  has_many :deal_variants

  accepts_nested_attributes_for :deal_variants, reject_if: :all_blank, allow_destroy: true
end

提前致谢!

Answer 1

我今天遇到了同样的问题，这是我的解决方案和解释:

发生这种情况是因为 decent_exposure已经为您设置了必需的属性，当您调用 .update(deal_params) 时它复制了自 DealVariant 的第一个实例以来的条目是set by decent_exposure ，第二个是 set by .update(deal_params) 称呼。您需要做的是使用简单的 .save create 中的方法和 update Action 。