Question

我很难过。我收到错误unknown attribute 'products_part' for Part.我开始尝试通过part表格创建与许多不同products相关联的新products_parts。相关代码：

# schema.rb
create_table "products_parts", force: :cascade do |t|
  t.integer "product_id"
  t.integer "part_id"
  t.datetime "created_at", null: false
  t.datetime "updated_at", null: false
end

如果相关，我现有设置的product_id表格中存在parts列，每个产品只允许一个部分。我不认为这会干扰吗？

# part.rb
class Part < ApplicationRecord
  has_many :products_parts
  has_many :products, through: :products_parts

  accepts_nested_attributes_for :products_parts, :allow_destroy => true
end

# products_part.rb
class ProductsPart < ApplicationRecord
  belongs_to :product
  belongs_to :part
end

# product.rb
class Product < ApplicationRecord
  has_many :products_parts
  has_many :parts, through: :products_parts
  accepts_nested_attributes_for :parts, :allow_destroy => true
end

-

# parts_controller.html.erb
class PartsController < ApplicationController
  before_action :set_part, only: [:show, :edit, :update, :destroy]

  def new
    @part = Part.new
    @part.uploads.build
    @products_parts = @part.products_parts.build
    @product = Product.order(brand_name: :asc).order(manufacturer_model_number: :asc)
  end

  def create
    @part = Part.new(part_params)
      if @part.save
        redirect_to part_path(@part), notice: '// Part was successfully created.'
      else
        render :new
      end
  end


  private

    def part_params
      params.require(:part).permit!
    end

end

在submit上传递的参数：

Request
Parameters:

{"utf8"=>"✓",
 "authenticity_token"=>"f+ObKsfs2QNP6l1MEDGSj6EZERMpHT/7vVKjAumC1aQmeTKdlPJNeSv2IZwNgsVPnKt2Siqi9x5oMmD2Ti8kMQ==",
 "part"=>
  {"products_part"=>{"product_ids"=>["", "191", "7"]},
   "manufacturer_model_number"=>"Screws-HB",
   "notes"=>""},
 "commit"=>"Create Part"}

-

# _form.html.erb
<%= bootstrap_form_for @part, url: parts_path, method: :post, :html => { :multipart => true } do |f| %>
  <%= f.fields_for(@products_parts) do |ff| %>
    <%= ff.collection_select(:product_ids, @product, :id, :product_select_with_model,
                             {:placeholder => "Select Product...", hide_label: true, :selected => @part.products.map(&:id)},
                             {:multiple => true, :class => 'newPartProductSearch', :style => "width:100%;"}) %>
  <% end %>
  <%= f.submit "Create Part", :style => "float:right;" %>
<% end %>

我基于this post.的帮助，在此基础上做了很多工作如果有人对我可以开始解决这个问题的方向有任何想法，我们将不胜感激！

Answer 1

使用以下代码替换_form：

# _form.html.erb
<%= bootstrap_form_for @part, url: parts_path, method: :post, :html => { :multipart => true } do |f| %>

  <%= f.collection_select(:product_ids, Product.all, :id, :name,
                          {include_blank: false, :include_hidden => false, :selected => @part.products.map(&:id)},
                          {:multiple => true}) %>

  <%= f.submit "Create Part", :style => "float:right;" %>
<% end %>

未经测试。但希望它能够奏效。

has_many通过＆amp;收集选择问题

1 个答案: