Question

所以基本上我有一个Rails网站的小事件部分我正在处理，简短的故事是你上传一个带有图像，日期，标题，描述等的事件。图像是使用carrierwave上传的并通过雾托管在Amazon S3上。然而，虽然我能够上传和保存书面信息，但由于我认为在POST行动期间发生的事情，图片不会出现在索引视图中：

   Started POST "/events" for ::1 at 2016-11-03 13:17:50 -0700
Processing by EventsController#create as HTML
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"CxSgDMK1+fsZfLNImzK/KV1TwTaRX7uhHq0OJEbbEZzTyC18SAEy7laK+mIVdd/jjzB5ZJ5qGs3jfYl2Yhi3mQ==", "event"=>{"title"=>"asdfdsfdsf", "image"=>#<ActionDispatch::Http::UploadedFile:0x007f8f09f48f90 @tempfile=#<Tempfile:/var/folders/vg/xzxwmlt12qz27hmcwq5d_q4r0000gn/T/RackMultipart20161103-73790-1pl5juy.JPG>, @original_filename="054.JPG", @content_type="image/jpeg", @headers="Content-Disposition: form-data; name=\"event[image]\"; filename=\"054.JPG\"\r\nContent-Type: image/jpeg\r\n">, "image_cache"=>"", "date"=>"2012-01-06", "time"=>"dsafdsafa", "body"=>"sadfadsfasfdf", "public"=>"1"}, "commit"=>"Save"}
  User Load (0.1ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = ?  ORDER BY "users"."id" ASC LIMIT 1  [["id", 2]]
   (0.0ms)  begin transaction
   (0.1ms)  rollback transaction
  Rendered events/_form.html.erb (4.2ms)
  Rendered events/new.html.erb within layouts/application (5.9ms)
  Rendered layouts/_navbar.html.erb (0.7ms)
  Rendered subscribers/_form.html.erb (0.8ms)
Completed 200 OK in 112ms (Views: 86.7ms | ActiveRecord: 0.2ms))

考虑到这一点，我觉得图片上传过程应该一起失败，但是当我第一次上传图片并发生render :new操作时，您可以看到上传的图片，除非我离开此页面（即使再次保存图像后）该图像也不会出现在索引视图中：

Imgur

首先要提到的是image的{{1}}属性在上传时，对象即将出现。

图片上传器

Event

新活动视图＆amp;表格部分

# encoding: utf-8

class EventImageUploader < CarrierWave::Uploader::Base

  # Include RMagick or MiniMagick support:
  # include CarrierWave::RMagick
  include CarrierWave::MiniMagick

  # Choose what kind of storage to use for this uploader:
  # storage :file
  storage :fog

  # Override the directory where uploaded files will be stored.
  # This is a sensible default for uploaders that are meant to be mounted:
  def store_dir
    "uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
  end

  # Provide a default URL as a default if there hasn't been a file uploaded:
  # def default_url
  #   # For Rails 3.1+ asset pipeline compatibility:
  #   # ActionController::Base.helpers.asset_path("fallback/" + [version_name, "default.png"].compact.join('_'))
  #
  #   "/images/fallback/" + [version_name, "default.png"].compact.join('_')
  # end

  # Process files as they are uploaded:
  # process :scale => [200, 300]
  #
  # def scale(width, height)
  #   # do something
  # end

  process :resize_to_fill => [400, 225]
  # Create different versions of your uploaded files:
  # version :thumb do
  #   process :resize_to_fit => [50, 50]
  # end

  # Add a white list of extensions which are allowed to be uploaded.
  # For images you might use something like this:
  # def extension_white_list
  #   %w(jpg jpeg gif png)
  # end

  # Override the filename of the uploaded files:
  # Avoid using model.id or version_name here, see uploader/store.rb for details.
  # def filename
  #   "something.jpg" if original_filename
  # end

end

表格部分

<div class="container">
  <div class="row">
    <div class="col-md-6 form-font">
      <div class="divider-vertical">
        <h1>New Event</h1>
         <p>Guidelines for Event:</p>
         <ul>
           <li>Leave the proper location and date.</li>
           <li>Explain the event in under 35 words.</li>
           <li>Explaine the pricing.</li>
         </ul>
       </div>
     </div>
     <div class="col-md-6 form-font">
       <h1>Add an Event</h1>
       <%= render partial: 'form', locals: { event: @event } %>
     </div>
   </div>
 </div>

事件控制器的相关摘录

<%= form_for event do |f| %>
  <div class="form-group">
    <%= f.label :title %>
    <%= f.text_field :title, class: 'form-control', placeholder: "Enter a title" %>
  </div>
  <% if event.image? %>
     <div class="form-group">
       <p>Current Image</p>
       <%= image_tag( event.image.url, style: 'max-height: 100px;' ) %>
     </div>
  <% end %>
  <div class="form-group">
    <%= f.label :image %>
    <%= f.file_field :image %>
    <%= f.hidden_field :image_cache %>
  </div>
  <div class="row">
    <div class="col-md-4">
      <div class="form-group">
        <%= f.label :date %>
        <%= f.date_field :date, class: 'datepicker form-control' %>
      </div>
    </div>
    <div class="col-md-8">
      <div class="form-group">
        <%= f.label :time %>
        <%= f.text_field :time, class: 'form-control' %>
      </div>
    </div>
  </div>
  <div class="form-group">
    <%= f.label :body %>
    <%= f.text_area :body, rows: 8, class: 'form-control', placeholder: "Enter the event info" %>
  </div>
  <div class="form-group">
    <%= f.label :public, class: 'checkbox' do %>
      <%= f.check_box :public %> Public event
    <% end %>
  </div>
  <%= f.submit "Save", class: 'btn btn-success' %>
<% end %>

考虑到Event.image属性即将出现，大多数视图都不相关。

请提出您希望查看的任何其他文件。

使用Carrierwave回滚事务

0 个答案: