Question

我试图创建一个表单，在创建该仪式时自动将奖励保存到仪式中。我已尽力遵循指南https://github.com/plataformatec/simple_form/wiki/Nested-Models和http://api.rubyonrails.org/classes/ActiveRecord/NestedAttributes/ClassMethods.html，但我一直收到错误

ActiveModel::ForbiddenAttributesError

我的代码如下：

ceremony.rb

class Ceremony < ApplicationRecord
  has_many :awards
  accepts_nested_attributes_for :awards, allow_destroy: true, reject_if: lambda { |attributes| attributes['kind'].blank?
end

award.rb

class Award < ApplicationRecord
  belongs_to :ceremony
end

_form.html.erb

<%= simple_form_for ceremony do |f| %>
  <%= f.input :title %>
  <% 3.times do Award.new %>
    <%= field_set_tag 'Award' do %>
      <%= f.simple_fields_for 'awards_attributes[]', award do |g| %>
        <%= g.input :title %>
        <%= g.input :description %>
        <%= g.input :category_id, as: :select, collection: Category.all %>
      <% end %>
    <% end %>
  <% end %>
<% end %>

最后是ceremonies_controller.rb

class CeremoniesController < ApplicationController
  def create
    ceremony = Ceremony.new(ceremony_params)
    handle_create(ceremony)
  end

  def new
    ceremony = Ceremony.new
  end

  private

  def handle_create

def handle_create(ceremony)
  if ceremony.save
    create_participant_and_awards(ceremony)
    redirect_to ceremony,
                notice: 'Ceremony successfully created'
  else
    render :new, error: 'There was an error adding the ceremony'
  end
end

def ceremony_params
  params.require(:ceremony).permit(:title, awards_attributes: [:title, :description, :category_id, :ceremony_id])
end

当我填写表单并点击提交时，它不会创建任何相关奖励。它们通过参数传递，如下：

Parameters: {"utf8"=>"✓", "authenticity_token"=>"2MdHYpZW4POOx2STvPP8sDh6lAtisy2dJDEuC1FaKMpOHUmwsQnk6GztnrrS8E2FC5ajvuhGCdZr56QgQMQAag==", "ceremony"=>{"title"=>"Test 1", "organisation"=>"test 1", "description"=>"", "closing_time(1i)"=>"2017", "closing_time(2i)"=>"4", "closing_time(3i)"=>"27", "closing_time(4i)"=>"17", "closing_time(5i)"=>"35", "organiser_id"=>"1", "awards_attributes"=>[{"title"=>"test2", "description"=>"test 2", "category_id"=>"1"}, {"title"=>"test 3", "description"=>"test 3", "category_id"=>"3"}, {"title"=>"test 4", "description"=>"test 4", "category_id"=>"2"}]}, "commit"=>"Create Ceremony"}

我知道我需要列出参数的白名单，但据我所知，按照指南进行操作。我不知道如何将我需要的内容列入白名单。任何帮助都非常感谢

Simple_form_for嵌套表单白名单属性

0 个答案: