Ruby on Rails - kẹp giấy giao dịch rollback

Question

Im sử dụng kẹp giấy như một thuộc tính lồng nhau và cố gắng để tải lên ảnh ở việc tạo ra mô hình với f.submit

Các bức ảnh mô hình belongs_to mô hình phân loại ..

c:\Site\brokerv1\brokr>rails --version 
Rails 5.0.0 


c:\Site\brokerv1\brokr>ruby -v 
ruby 2.2.4p230 (2015-12-16 revision 53155) [i386-mingw32] 


gem "paperclip", "~> 4.2" 

Vấn đề là sau khi nộp tôi nhận được một "giao dịch rollback" từ kẹp giấy.

Một điều lạ là tôi thực sự có thể đi và xem các tập tin đã lưu trong đường dẫn được đề cập bởi kẹp giấy ...

mô hình:

class Photo < ApplicationRecord 

    belongs_to :classified 

    has_attached_file :image, :styles => { :large => "600x170", :medium => "250x250!",:thumb => "100x100>" }, :default_url => lambda { |photo| photo.instance.set_default_url} 
    validates_attachment_content_type :image, :content_type => ["image/jpg", "image/jpeg", "image/png", "image/gif"] 

    validates_attachment_presence :datafile unless :datafile 
end 


    class Classified < ApplicationRecord 
    belongs_to :user 

    has_many :photos 
    accepts_nested_attributes_for :photos 



end 

Schema.rb

ActiveRecord::Schema.define(version: 20160814114331) do 

    create_table "classifieds", force: :cascade do |t| 
    t.string "make" 
    t.string "model" 
    t.string "year" 
    t.string "color" 
    t.string "title" 
    t.string "condition" 
    t.string "price" 
    t.string "offer" 
    t.string "make_country" 
    t.string "category" 
    t.text  "description" 
    t.integer "user_id" 
    t.datetime "created_at", null: false 
    t.datetime "updated_at", null: false 
    t.index ["user_id"], name: "index_classifieds_on_user_id" 
    end 

    create_table "photos", force: :cascade do |t| 
    t.integer "classified_id" 
    t.datetime "created_at",   null: false 
    t.datetime "updated_at",   null: false 
    t.string "image_file_name" 
    t.string "image_content_type" 
    t.integer "image_file_size" 
    t.datetime "image_updated_at" 
    t.index ["classified_id"], name: "index_photos_on_classified_id" 
    end 

    create_table "users", force: :cascade do |t| 
    t.string "first_name" 
    t.string "email" 
    t.string "password_digest" 
    t.datetime "created_at",  null: false 
    t.datetime "updated_at",  null: false 
    end 

end 

Bộ điều khiển

class ClassifiedsController < ApplicationController 


    before_action :require_user, only: [:index, :show] 


    def new 
     @classified = Classified.new 
     @photo = @classified.photos.build 
    end 

    def index 
     @classified = Classified.all 
    end 

    def show 
     @classified = Classified.find(params[:id]) 
    end 


    def edit 
     @classified = Classified.find(params[:id]) 

    end 

    def update 
     @classified = Classified.find(params[:id]) 

     if @classified.update_attributes(classified_params) 

      redirect_to '/' 
     else 
      redirect_to '/' 
     end 
    end 

    def destroy 
     flash[:success] = "deleted" 
     if Classified.find(params[:id]).destroy 
      redirect_to '/' 
     else 
      redirect_to '/' 
     end 
    end 

    def create 

     @classified = Classified.new(classified_params) 
     @classified.user_id = current_user.id 


     if @classified.save 
      redirect_to '/' 
     else 
      render 'create' 
     end   


    end 




private 


    def classified_params 
     params.require(:classified).permit(:make ,:model,:year,:color,:title,:condition,:price,:offer,:make_country ,:category ,:description ,:photos_attributes => [:id , :image , :classified_id ] ) 
    end 
end 

Xem:

<div class="new"> 
    <div class="container-fluid"> 

    <section class="container"> 
     <div class="container-page"> 

     <div class="col-md-6"> 
      <h3 class="dark-grey">Εξοπλισμός προς πώληση</h3> 
      <%= form_for (@classified) , :html => { :multipart => true } do |f| %> 

      <% if @classified.errors.any? %> 
      <div id="error_explanation"> 
      <h2> 
       <%= pluralize(@classified.errors.count, "error") %> prohibited 
       this article from being saved: 
      </h2> 
      <ul> 
       <% @classified.errors.full_messages.each do |msg| %> 
       <li><%= msg %></li> 
       <% end %> 
      </ul> 
      </div> 
      <% end %> 

      <div class="form-group col-lg-3"> 
      <label>Μάρκα</label> 
      <%= f.text_field :make, :placeholder => "π.χ. Fender" , :class => "form-control"%> 
      </div> 

      <div class="form-group col-lg-6"> 
      <label>Μοντέλο</label> 
      <%= f.text_field :model, :placeholder => "π.χ. Stratocaster" , :class => "form-control"%> 
      </div> 

      <div class="form-group col-lg-3"> 
      <label>Έτος</label> 
      <%= f.text_field :year, :placeholder => "π.χ. 1992" , :class => "form-control"%> 
      </div> 

      <div class="form-group col-lg-12"> 
      <label>Τίτλος Αγγελίας</label> 
      <%= f.text_field :title, :placeholder => "" , :class => "form-control"%> 
      </div> 

      <div class="form-group col-lg-5"> 
      <label>Κατάσταση</label> 
      <%= f.text_field :condition, :placeholder => "" , :class => "form-control"%> 
      </div> 

      <div class="form-group col-lg-4"> 
      <label>Χώρα κατασκευής</label> 
      <%= f.text_field :make_country, :placeholder => "" , :class => "form-control"%> 
      </div> 

      <div class="form-group col-lg-3"> 
      <label>Τιμή</label> 
      <%= f.text_field :price, :placeholder => "" , :class => "form-control"%> 
      </div> 

      <div class="form-group col-lg-12"> 

      <h3 class="dark-grey">Περιγραφή</h3> 
      <%= f.text_area :description, rows: "15", :placeholder => "" , :class => "form-control"%> 
     </div> 





     <div class="form-group col-lg-12"> 

      <h3 class="dark-grey">Φωτογραφίες</h3> 


      <%= f.fields_for :photos do |p| %> 

      <%= p.file_field :image %> 

      <% end %> 

     </div> 




     <div class="linkbtn"> 
      <%= f.submit nil, class: "btn-submit" %> 
      <% end %> 
     </div> 

     </div> 

điều khiển đầu ra:

Processing by ClassifiedsController#create as HTML 
    Parameters: {"utf8"=>"✓", "authenticity_token"=>"Xar6eiClpg4EtaihHCsKuPvfHZjOLgagcXlkB6EW3YO5UKgKzSU+Xo5+4EGVKPzljsGLE6p/JxVeQBNLVAZOSw==", "classified"=>{"make"=>"kdhf", "model"=>"yid", "year"=>"dtyi", "title"=>"dtyi", "condition"=>"dyti", "make_country"=>"dtyi", "price"=>"tydi", "description"=>"dyti", "photos_attributes"=>{"0"=>{"image"=>#<ActionDispatch::Http::UploadedFile:0x007f1ec21689c8 @tempfile=#<Tempfile:/tmp/RackMultipart20160815-15158-ed3vq1.JPG>, @original_filename="IMG_0367.JPG", @content_type="image/jpeg", @headers="Content-Disposition: form-data; name=\"classified[photos_attributes][0][image]\"; filename=\"IMG_0367.JPG\"\r\nContent-Type: image/jpeg\r\n">}}}, "commit"=>"Create Classified"} 
Command :: file -b --mime '/tmp/8c1670d3211dcd380aba6a73797c0a1e20160815-15158-1y57b8t.JPG' 
Command :: identify -format '%wx%h,%[exif:orientation]' '/tmp/8c1670d3211dcd380aba6a73797c0a1e20160815-15158-1wgarr9.JPG[0]' 2>/dev/null 
Command :: identify -format %m '/tmp/8c1670d3211dcd380aba6a73797c0a1e20160815-15158-1wgarr9.JPG[0]' 
Command :: convert '/tmp/8c1670d3211dcd380aba6a73797c0a1e20160815-15158-1wgarr9.JPG[0]' -auto-orient -resize "600x170" '/tmp/f7a62ccc518343a663edf66b07d7245c20160815-15158-572p8w' 
Command :: identify -format '%wx%h,%[exif:orientation]' '/tmp/8c1670d3211dcd380aba6a73797c0a1e20160815-15158-1wgarr9.JPG[0]' 2>/dev/null 
Command :: identify -format %m '/tmp/8c1670d3211dcd380aba6a73797c0a1e20160815-15158-1wgarr9.JPG[0]' 
Command :: convert '/tmp/8c1670d3211dcd380aba6a73797c0a1e20160815-15158-1wgarr9.JPG[0]' -auto-orient -resize "250x250!" '/tmp/f7a62ccc518343a663edf66b07d7245c20160815-15158-yboo18' 
Command :: identify -format '%wx%h,%[exif:orientation]' '/tmp/8c1670d3211dcd380aba6a73797c0a1e20160815-15158-1wgarr9.JPG[0]' 2>/dev/null 
Command :: identify -format %m '/tmp/8c1670d3211dcd380aba6a73797c0a1e20160815-15158-1wgarr9.JPG[0]' 
Command :: convert '/tmp/8c1670d3211dcd380aba6a73797c0a1e20160815-15158-1wgarr9.JPG[0]' -auto-orient -resize "100x100>" '/tmp/f7a62ccc518343a663edf66b07d7245c20160815-15158-13uo06a' 
    User Load (0.1ms) SELECT "users".* FROM "users" WHERE "users"."id" = ? LIMIT ? [["id", 4], ["LIMIT", 1]] 
    (0.1ms) begin transaction 
    User Load (0.1ms) SELECT "users".* FROM "users" WHERE "users"."id" = ? LIMIT ? [["id", 4], ["LIMIT", 1]] 
Command :: file -b --mime '/tmp/8c1670d3211dcd380aba6a73797c0a1e20160815-15158-qz9itf.JPG' 
    (0.1ms) rollback transaction 
    Rendering classifieds/create.html.erb within layouts/application 
    Rendered classifieds/_gear.html.erb (4.9ms) 
    Rendered classifieds/_description.html.erb (0.4ms) 
    Rendered classifieds/create.html.erb within layouts/application (7.0ms) 
Completed 200 OK in 422ms (Views: 37.6ms | ActiveRecord: 2.7ms) 

Và lỗi tôi nhận được tại f.submit:

Photos classified must exist 

Answer 1

sau khi tất cả các giải pháp đã inverse_of

class Photo < ApplicationRecord 

    belongs_to :classified,inverse_of: :photos 

    has_attached_file :image, :styles => { :large => "600x170", :medium => "250x250!",:thumb => "100x100>" }, :default_url => lambda { |photo| photo.instance.set_default_url} 
    validates_attachment_content_type :image, :content_type => ["image/jpg", "image/jpeg", "image/png", "image/gif"] 

    validates_attachment_presence :datafile unless :datafile 
end 


    class Classified < ApplicationRecord 
    belongs_to :user 

    has_many :photos,inverse_of: :classified 
    accepts_nested_attributes_for :photos 



end 

tôi nghĩ vì một số lý do trong rails 5, cho nested_attributes hoạt động, bạn cần sử dụng inverse_of, mặc dù im không đủ điều kiện để giải thích nó.