Question

我正在使用其中包含另一个嵌套表单的表单，我想更新嵌套元素，但它不起作用...

环境：Rails 3.2

_form.html.haml

= simple_form_for [:pim, activity]
  ...
  = f.simple_fields_for :pictures do |pic_form|                                                       
    %div.media
      .pull-left.col-md-2
        = image_tag pic_form.object.image.mini.url
      %div.media-body.col-md-5
        = pic_form.input :alt
      = pic_form.input :element_id, as: :hidden
      = pic_form.input :element_type, as: :hidden
      = pic_form.input :_destroy, as: :hidden

活动有X张照片：

activity.rb

has_many :pictures, :as => :element, :dependent => :destroy
...
accepts_nested_attributes_for :pictures, allow_destroy: true

当我修改嵌套元素的输入时，服务器跟踪是：

 Picture Load (0.3ms)  SELECT "pictures".* FROM "pictures" WHERE "pictures"."element_id" = 13579 AND "pictures"."element_type" = 'Activity' AND "pictures"."id" IN (9839, 9840, 9838)

但0更新......和0错误......

你知道发生了什么吗？我尝试了很多解决方案，但它们不起作用。感谢。

编辑：我忘记了，但是在Activity的form_for中它编辑了两个嵌套表单，第二个表单效果很好.......

修改

 ********************************************************************************
 {"utf8"=>"✓",
 "_method"=>"put",
 "authenticity_token"=>"cbOJlat6uT3vIKrb2xaNXaD1osWTHL3435gALI8NDBU=",
 "activity"=>{"id"=>"13579",
          "name"=>"dw",
          "category_id"=>"27",
          "address"=>"",
          "description"=>"",
          "description_source"=>"",
          "details"=>"",
          "from_price"=>"46",
          "pictures_attributes"=> {"0"=>{"source"=>"sq",
                                         "element_id"=>"13579",                           
                                         "element_type"=>"Activity",
                                         "_destroy"=>"false",
                                         "id"=>"9840"},
                                   "1"=>{"source"=>"str de base",
                                         "element_id"=>"13579",
                                         "element_type"=>"Activity",
                                         "_destroy"=>"false",
                                         "id"=>"9839"},
                                   "2"=>{"source"=>"",
                                         "element_id"=>"13579",
                                         "element_type"=>"Activity",
                                         "_destroy"=>"false",
                                         "id"=>"9838"}},
          "csv_id"=>"italy",
          "options_attributes"=> {"0"=>{"name"=>"a",
                                        "description"=>"",
                                        "code_pre"=>"",
                                        "code_type"=>"",
                                        "activity_id"=>"13579",
                                        "_destroy"=>"false",
                                        "id"=>"38"}}
          },
 "commit"=>"Save",
 "action"=>"update",
 "controller"=>"pim/activities",
 "locale"=>"fr",
 "id"=>"13579"}
 (print generate by `pr params`)
 ********************************************************************************

 Activity Load (0.3ms)  SELECT "activities".* FROM "activities" WHERE "activities"."id" = $1 LIMIT 1  [["id", "13579"]]
 (0.2ms)  BEGIN
 Picture Load (0.3ms)  SELECT "pictures".* FROM "pictures" WHERE "pictures"."element_id" = 13579 AND "pictures"."element_type" = 'Activity' AND "pictures"."id" IN (9840, 9839, 9838)
 Option Load (0.2ms)  SELECT "options".* FROM "options" WHERE "options"."activity_id" = 13579 AND "options"."id" IN (38)
 (0.3ms)  UPDATE "activities" SET "ids" = '"csv_id"=>"italy-5" "updated_at" = '2014-04-28 15:23:16.962313' WHERE "activities"."id" = 13579
 (0.1ms)  UPDATE "options" SET "ids" = '"code_pre"=>"","code_type"=>""', "updated_at" = '2014-04-28 15:23:16.963988' WHERE "options"."id" = 38
 (3.7ms)  COMMIT
 Redirected to http://localhost:3000/fr/pim/activities/13579/edit

source“sq”这是一个新字符串

 "pictures_attributes"=> {"0"=>{"source"=>"sq",

source“str de base”它是bdd中的值

 "1"=>{"source"=>"str de base",

activities_controller.rb

def update
       pr params, decorator: '*'                                                                             
       @activity = Activity.find(params[:id])
       params[:activity].delete(:id)
       if @activity.update_attributes(params[:activity])
         redirect_to edit_pim_activity_path(@activity), flash: { success: I18n.t("pim.activities.saved") }
       else
         render :new, error: I18n.t("pim.activities.error")
       end   
     end

picture.rb

class Picture < ActiveRecord::Base
  require 'carrierwave/orm/activerecord'
  include Rails.application.routes.url_helpers

  IMAGE_SIZES = {
    mini: [100, 100]
  }
  mount_uploader :image, PictureUploader

  belongs_to :element, :polymorphic => true

  belongs_to :point, foreign_key: :element_id, foreign_type: 'Point'

  after_save :element_changed

  def element_changed
    if !self.element_type.nil? && self.element_type_changed?
      self.image.recreate_versions!
    end
  end

  def to_jq_read
    {
      "tall" => image.tall.url,
    }
  end

  def to_jq_upload
    {
      "id" => id,
      "name" => read_attribute(:image),
      "size" => image.size,
      "url" => image.url,
      "tiny" => image.tiny.url,
     "small" => image.small.url,
     "tall" => image.tall.url,
      "delete_url" => admin_picture_path(:id => id),
      "delete_type" => "DELETE"
    }
  end

  def featured_big_url
    self.image.featured_big.url
  end

  def featured_small_url
    self.image.featured_small.url
  end
  def self.remove_by_params(pictures)
    pictures.each do |pic|
      picture = Picture.find(pic.second[:id])
      picture.destroy
    end
  end

  def self.destroy_by_ids(ids)
    ids.each do |id|
      if picture = Picture.find(id)
        picture.destroy
      end
    end
  end

end

Answer 1

您是否允许picture_attributes进行质量分配：

attr_accessible :pictures_attributes

了解更多信息：http://apidock.com/rails/ActiveModel/MassAssignmentSecurity/ClassMethods/attr_accessible

rails 3.2嵌套表单在发送时不会调用update

1 个答案: