Ruby on rails Rails 3.2嵌套表单自定义外键无法保存

我有这样一个模型：

class Review < ActiveRecord::Base
  attr_accessible :approved, :reviewed_id, :for, :user_id, :text, :rating, :title

  belongs_to :business
  belongs_to :product
end

我救不了协会。simple_form表示存在错误，但我在日志中看不到错误，并且所有其他字段都经过验证，因此我猜测关联存在问题

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附带问题：我如何使简单表单显示所有错误？

通过使用多态关联并在评论模型中删除for和review id来修复此问题。请参阅：

class Product < ActiveRecord::Base
  include ApplicationHelper
  belongs_to :business
  belongs_to :catalog
  belongs_to :category

  has_many :reviews, :foreign_key => :reviewed_id
  has_many :features, :dependent => :destroy
end

class Business < ActiveRecord::Base
  validates_presence_of :name
  validates_presence_of :category

  mount_uploader :photo, PhotoUploader

  has_many :catalogs, :dependent => :destroy
  has_many :products, :dependent => :destroy
  has_many :branches, :dependent => :destroy
  has_many :reviews, :foreign_key => :reviewed_id
end

def create
  @business = Business.find(params[:business_id])

  if params.has_key?('product_id')
    @product = Product.find(params[:product_id])
    @review = @product.reviews.build(params[:review])

    if @review.save
      flash[:notice] = 'Pending Review Submitted'
      redirect_to business_product_path(@business, @product)
    else
      @form_resources = [@business, @product, @review]
      respond_with(@business, @product, @review)
    end
  else
    @review = @business.reviews.build(params[:review])

    if @review.save
      flash[:notice] = 'Pending Review Submitted'
      redirect_to business_path(@business)
    else
      @form_resources = [@business, @review]
      respond_with(@business, @review)
    end
  end
end