Question

我创建了一种更新多个记录嵌套属性的方法（感谢railscast和其他帮助），但是在我的模型中，我具有唯一性验证。我允许更新嵌套属性，并且如果更新中包含现有记录空白，则删除它。

我收到以下错误：

ActiveRecord :: RecordInvalid（验证失败：商店产品打印文件店产品已被拿走）：

使用以下内容时：

def update_multiple
    @shop_products = ShopProduct.find(params[:shop_product_ids])
    @image_files = ImageFile.where(user_id: current_user.id)
    @shop_products.reject! do |shop_product|
        shop_product.update_attributes!(params[:shop_product].permit(:shop_product, shop_product_print_files_attributes: [ :id, :print_file, :print_location_id, :shop_product_id, :image_file_id ]).reject { |k,v| v.blank? })
    end
    if @shop_products.empty?
      redirect_to '/'
    else
      @shop_product = ShopProduct.new(params[:shop_product])
      render "edit_multiple"
    end
  end

这种形式：

<%= form_with model: @shop_product, url: update_multiple_shop_products_path, method: :put do |f| %>
   <% @shop_products.each do |shop_product| %>
    <%= hidden_field_tag "shop_product_ids[]", shop_product.id %>
   <% end %>

   <%= f.fields_for :shop_product_print_files do |ff| %>
        <%= ff.object.print_location.title %>
        <%= ff.hidden_field :print_location_id %>
        <% if ff.object.image_file_id.present? %>
             <%= ff.select :image_file_id, options_for_select(@image_files.map { |image| [image.id, {'data-img-src'=>image.image_file_url(:thumb)}]}, ff.object.image_file_id), {:include_blank => 'Choose None'}, class: "image-picker" %>
        <% else %>
             <%= ff.select :image_file_id, options_for_select(@image_files.map { |image| [image.id, {'data-img-src'=>image.image_file_url(:thumb)}]}), {:include_blank => 'Choose None'}, class: "image-picker" %>
        <% end %>
    ...
  ...
...

型号：

class PrintLocation < ApplicationRecord
  has_many :shop_products, through: :shop_product_print_files
  has_many :shop_product_print_files
end

class ShopProductPrintFile < ApplicationRecord
  validates :shop_product, uniqueness: { scope: :print_location }
  belongs_to :shop_product
  belongs_to :print_location
  belongs_to :image_file
end

class ShopProduct < ApplicationRecord
  has_many :shop_product_print_files
  has_many :print_locations, through: :shop_product_print_files
  accepts_nested_attributes_for :shop_product_print_files
  accepts_nested_attributes_for :shop_product_print_files, reject_if: :reject_file, :allow_destroy => true
  def reject_file(attributes)
    if attributes[:image_file_id].blank?
      if attributes[:id].present?
        attributes.merge!({:_destroy => 1}) && false
      else
        true
      end
    end
  end
  ...
end

class ImageFile < ApplicationRecord
  # this is where users upload files to
  belongs_to :user
  has_many :shop_product_print_files
end

路线：

resources :shop_products do
    collection do
      get :edit_multiple
      put :update_multiple
    end
  end

当我像这样按每条记录进行更新时：

<%= form_for @shop_product do |f| %>
   <% PrintLocation.all.each{|p| @shop_product.shop_product_print_files.build(print_location: p) if @shop_product.shop_product_print_files.where(print_location: p).empty? } %>

   <%= f.fields_for :shop_product_print_files do |ff| %>
       <%= ff.object.print_location.title %>
       .....

控制器中的更新方法：

if @shop_product.update!(shop_product_params)
...

使用Update方法可以正常工作。该模型将执行其操作，删除尚未通过但尚未存在的属性，更新已存在的属性，如果不存在则创建新属性。但是，对于update_multiple方法，这似乎并不适用

我只能假设有一些验证回调仅将Update方法列入白名单，但是我不确定吗？

为什么在每条记录的基础上使用Update方法期间，为什么我能够成功更新ShopProduct。但是当我使用实现Update Multiple方法的表单时，会收到验证错误？

是否应适用相同的规则？

这是传递的参数之间的区别

穆特里更新：

参数：{“ utf8” =>“✓”，“ authenticity_token” =>“ ==”，“ shop_product_ids” => [“ 42”]，“ shop_product” => {“ shop_product_print_files_attributes” => {“ 0 “ => {” print_location_id“ =>” 1“，” image_file_id“ =>” 2“}，” 1“ => {” print_location_id“ =>” 2“，” image_file_id“ =>” 2“}，” 2 “ => {” print_location_id“ =>” 3“，” image_file_id“ =>”“}，” 3“ => {” print_location_id“ =>” 4“，” image_file_id“ =>”“}，” 4“ = > {“ print_location_id” =>“ 5”，“ image_file_id” =>“”}，“ 5” => {“ print_location_id” =>“ 6”，“ image_file_id” =>“”}}}，“ commit” = >“已检查编辑”}

1条记录更新：

参数：{“ utf8” =>“✓”，“ authenticity_token” =>“ ==”，“ shop_product” => {...“ shop_product_print_files_attributes” => {“ 0” => {“ print_location_id” = >“ 1”，“ image_file_id” =>“ 1”，“ id” =>“ 145”}，“ 1” => {“ print_location_id” =>“ 2”，“ image_file_id” =>“”，“ id” =>“ 151”}，“ 2” => {“ print_location_id” =>“ 3”，“ image_file_id” =>“”}，“ 3” => {“ print_location_id” =>“ 4”，“ image_file_id” = >“”}，“ 4” => {“ print_location_id” =>“ 5”，“ image_file_id” =>“”}，“ 5” => {“ print_location_id” =>“ 6”，“ image_file_id” =>“ “}}，” id“ =>” 42“}，” commit“ =>” Sync“，” id“ =>” 42“}

流为：

用户附加/创建ShopProduct的......全部附加后，他们便可以一次更新所有产品。 ShopProduct可以已经附加shop_product_print_files。

然后一次选择要更新的内容...

目标是一次全部更新时，它将覆盖和更新已通过的任何先前记录，或者创建新记录，或者如果未通过则删除现有记录，就像通过记录传递来处理记录一样 >

我要注意的是，在一次更新中，我已经拥有了，因此ShopProductPrintFile加载后便会进行更新。但是在multi_update中，它不会被加载并视为新的。因此，验证：validates :shop_product_id, uniqueness: { scope: :print_location_id }已经存在，不会更新，但是由于验证而“创建”并且不会创建。它是否正确？如果是这样，我如何允许这种情况发生？

update_attributes！（）验证在自定义更新上失败，但可用于常规更新

0 个答案: