ruby-on-rails - 无法检测保存嵌套对象时的错误

Question

我将 cocoon gem 用于嵌套表单。一个 accommodation_category 可以有很多选项。我制作了一个表单结构，用户首先创建 accommodation_category，然后通过自定义 Controller 操作创建选项。

一切都按预期工作，但是嵌套的选项对象没有保存在我的数据库中。我将 cocoon 用于与 accommodation_category 相关的其他几个嵌套对象，但是选项对象是唯一不保存的对象。我检查了 2 天，但似乎无法在我的代码中找到错误/拼写错误。

在我的本地环境中运行时，我在到达我的 accommodation_category.rb 第 32 行时获得回滚

@accommodation_category = @accommodation_category.update_attributes(accommodation_category_params)

文本终端运行本地主机:

“于 2019 年 9 月 9 日 10:45:05 +0200 为::1 开始补丁“/parks/19/accommodation_categories/132”

由 AccommodationCategoriesController 处理#update 为 HTML

参数:{“utf8” =>“✓”，“authenticity_token” =>“x+bfzcfdry2igq+WH4H4C/xiekavovalmmmtzlnuanb65oaxcm09fw2biqttzessizizizizl87fofofoffofenpvc652652652652652652652652652652652652652652652265265265652 => "name"=>"1", "description"=>"", "_destroy"=>"false"}}}, "commit"=>"Save", "park_id"=>"19", "id"=>“132”

用户负载 (0.2ms) SELECT "users".* FROM "users"WHERE "users"."id"= $1 ORDER BY "users"."id"ASC LIMIT $2 [["id", 2], ["限制", 1]]

↳/Users/xx/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-5.2.3/lib/active_record/log_subscriber.rb:98 公园负载(0.2 毫秒)SELECT "parks".* FROM "parks"WHERE "parks"."id"= $1 LIMIT $2 [["id", 19], ["LIMIT", 1]]

↳ app/controllers/accommodation_categories_controller.rb:29 AccommodationCategory 加载(0.4 毫秒)选择“accommodation_categories”。* 从“accommodation_categories”中“accommodation_categories”。“park_id”= $1 和“accommodation_categories”。“id”= $2 限制 $3 [[“park_id”，19]，[“id” ", 132], ["限制", 1]]

↳ app/controllers/accommodation_categories_controller.rb:30 (0.2 毫秒)开始

↳ app/controllers/accommodation_categories_controller.rb:32 (0.1 毫秒)回滚

↳ app/controllers/accommodation_categories_controller.rb:32 AccommodationCategory 负载(0.2 毫秒)从“accommodation_categories”中选择“accommodation_categories”。*从“accommodation_categories”中“park_id”= $ 1 AND“accommodation_categories”。“id”= $ 2 LIMIT $ 3 [[“park_id”，19]，[“id” ", 132], ["限制", 1]]

↳ app/controllers/accommodation_categories_controller.rb:44

重定向到 http://localhost:3000/accommodation_categories/132/new_discounts在 19 毫秒内完成 302 发现(ActiveRecord:1.4 毫秒)"

结束文本终端运行本地主机

请在下面找到该应用程序的代码:

住宿类别.rb

class AccommodationCategory < ApplicationRecord
  belongs_to :park

  has_many :options, inverse_of: :accommodation_category, dependent: :destroy
  accepts_nested_attributes_for :options, allow_destroy: true, reject_if: ->(attrs) { attrs['name'].blank? }
end

选项.rb

class Option < ApplicationRecord
  belongs_to :accommodation_category
end

accommodation_categories_controller.rb

class AccommodationCategoriesController < ApplicationController
[]
def new_options
    @accommodation_category = AccommodationCategory.find(params[:id])
    @park = @accommodation_category.park
    authorize @accommodation_category
  end

 def update
    @park = Park.find(params[:park_id])
    @accommodation_category = 
     @park.accommodation_categories.find(params[:id])
    authorize @accommodation_category
    @accommodation_category = 
  @accommodation_category.update_attributes(accommodation_category_params)
redirect_to root_path
end

private
  def accommodation_category_params
    params.require(:accommodation_category).permit(:name, :description, options_attributes: [:name, :description, :rank, _destroy])
  end
end

new_options.html.erb

<%= render 'options_new_form', park: @park%>

_option_new.html.erb

<%= simple_form_for [@park, @accommodation_category] do |f|%>
<% f.fields_for :options do |option| %>
  <%= render 'option_fields', f: option %>
<% end %>

<div>
  <%= link_to_add_association 'add option', f, :options %>
</div>

<%= f.submit "Save", class: "btn btn-primary" %>
<% end %>

_option_fields.html.erb

<div>
  <%= f.label :name %>
  <%= f.text_field :name %>

  <%= f.label :description %>
  <%= f.text_field :description %>

  <%= f.check_box :_destroy %>
  <%= link_to_remove_association "remove option", f %>
</div>

Answer 1

尝试添加inverse_of

class AccommodationCategory < ApplicationRecord
  belongs_to :park

  has_many :options, dependent: :destroy, inverse_of: :accommodation_category
  accepts_nested_attributes_for :options, allow_destroy: true, reject_if: ->(attrs) { attrs['name'].blank? }
end