Ruby on rails - 回形针未保存到数据库 [英] Ruby on rails - paperclip not saving to database

问题描述

我正在尝试在 Rails 中创建产品页面.这包括添加多个图像.我有一种用于产品的模型，一种用于照片和用户.我正在使用回形针宝石上传照片.但我有两个问题.

I'm trying to make a create product page in rails. This includes adding multiple images. I have one model for products one for photos and for users. I'm using the paperclip gem for photo upload. But I have 2 problems.

1. 我的文件输入不允许允许我选择多个图像
2. 当我查看产品时没有图片显示，因为图片没有保存到数据库

附言我使用 HAML，但没有照片控制器.

P.S. I use HAML and I dont have a photo controller.

产品控制器

class ProductsController < ApplicationController
    before_filter :current_user, only: [:create, :destory]
    before_filter :correct_user, only: :destory

  def new 
@product = Product.new
    @photo = Photo.new
    5.times { @product.photos.build }
  end

  def create

  @photo = current_user.photos.build(params[:photo])

  @product = current_user.products.build(params[:product])
    if @product.save
        render "show", :notice => "Sale created!"
    else
        render "new", :notice => "Somehting went wrong!"
    end
end

def show
@product = Product.find(params[:id]) 
end

创建产品页面

= form_for @product, :html => { :multipart => true } do |f|
  - if @product.errors.any?
    .error_messages
      %h2 Form is invalid
      %ul
        - for message in @product.errors.full_messages
          %li
            = message
  %p
    = f.label :name
    = f.text_field :name
  %p
    = fields_for :photos do |f_i|
      =f_i.file_field :image 

  %p.button
    = f.submit

产品型号

class Product < ActiveRecord::Base
  attr_accessible :description, :name, :price, :condition, :ship_method, :ship_price, :quantity, :photo
  has_many :photos, dependent: :destroy
  accepts_nested_attributes_for :photos
  belongs_to :user

照片模型

class Photo < ActiveRecord::Base
  attr_accessible :product_id

  belongs_to :product
  has_attached_file :image,
    :styles => {
      :thumb=> "100x100#",
      :small  => "300x300>",
      :large => "600x600>"
        }
end

用户模型

class User < ActiveRecord::Base
  attr_accessible :email, :password, :password_confirmation, :name

  attr_accessor :password
  has_many :products, dependent: :destroy
  has_many :photos,:through=>:products

显示产品页面

  %b seller
  = @product.user.name
  %br 
  - @product.photos.each do |photo|
    = image_tag photo.image.url

推荐答案

您是否使用 Resque 作为后台作业，如果是，那么您需要使用 rake resque:work QUEUE= 启动它'*'.in rails 通常 Resque 用于处理涉及邮寄和图片上传的后台作业.使用回形针配置 Amazon S3.

Are you using Resque for background job,if yes then u need to start it using rake resque:work QUEUE='*'.in rails usually Resque is used to handle background jobs which involves mailer and picture upload.OR an example below for product.html.erb having partial for photos upload for that product with paperclip configures with Amazon S3.

product.html.erb

product.html.erb

<%= render :partial => 'photos' %>

_photos.html.erb 至少需要一张图片

_photos.html.erb for atleast one image mandatory

       <% if @product.photos[0].nil? %>
                <a href="javascript:void(0);" class="add-photos" >
                <img src="/assets/default/product-add-photos.png" alt="Add product photos"/>              
                 </a>   
        <% end %>
 <img src="<%= (@product.product_photos[0].nil? ? "" : @product.photos[0].image.url(:small)) %>" id="photos_1" class="product-photos-src <%=@product.photos[0].nil? ? 'dontdisplay' : ''%> "/>

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