Rails 载波 "action"=>"create"} 允许：false>

Question

第一次尝试通过 CarrierWave 上传图片时，我正在努力思考。我可以看到正在发送的数据，但随后在控制台中我还看到了操作中的 BEGIN 和 ROLLBACK。所以，这就是我目前所拥有的

控制器

 class PhotosController < ApplicationController
 before_action :set_photo, only: [:show, :edit, :update]

def index
@photos = Photo.all
end

def new
@photos = Photo.new
end

def create
@photo = Photo.new(photo_params)

if @photo.save
  redirect_to photos_path, notice: "The photo #{@photo.name} has been uploaded."
else
  render "new"
end
end

private
def photo_params
params.require(:photo).permit(:name, :image, :id)
end

def set_photo
 @photo = Photo.find(params[:id])
 end
end

表格

  <div class="well">
  <%= form_for Photo.new, html: { multipart: true } do |f| %>
  <%= f.label :name %>
  <%= f.text_field :name %>
  <%= f.label :image %>
  <%= f.file_field :image %>
  <%= f.submit "Save", class: "btn btn-primary" %>
  <% end %>
  </div>

型号

 class Photo < ApplicationRecord
  mount_uploader :image, ImageUploader
 end

UPLOADER 与生成的差不多，存储是文件，它使用 MiniMagick 并启用了拇指版本

现在，当我点击提交按钮时，我在控制台中看到了这个：

Started POST "/photos" for 127.0.0.1 at 2017-09-14 22:11:25 +0200
Processing by PhotosController#create as HTML
Parameters: {"utf8"=>"V", "authenticity_token"=>"Aj4CyJLaxh439igdVYJ60Pz9TqLzuvPVfkh903YAcaVuIqU8bKmX0zrgbL/GvnabcQ7i/hsqWxwvG1NRQO16JA==", "photo
"=>{"name"=>"fdsfds", "image"=>#<ActionDispatch::Http::UploadedFile:0xa96f1d0 @tempfile=#<Tempfile:C:/Users/Andrea/AppData/Local/Temp/RackMultipart2
0170914-4696-1pwrynm.jpg>, @original_filename="Clipboard02.jpg", @content_type="image/jpeg", @headers="Content-Disposition: form-data; name=\"photo[
image]\"; filename=\"Clipboard02.jpg\"\r\nContent-Type: image/jpeg\r\n">}, 
"commit"=>"Save"}
(1.0ms)  BEGIN 
(0.0ms)  ROLLBACK

并且在我所在的页面运行上传，它 returns 到新表单并且文本出现在底部

<ActionController::Parameters {"utf8"=>"✓", "authenticity_token"=>"....(manuallyremoved)==", "photo"=><ActionController::Parameters {"name"=>"fdsfds", "image"=>#<ActionDispatch::Http::UploadedFile:0xa96f1d0 @tempfile=#<Tempfile:C:/Users/Andrea/AppData/Local/Temp/RackMultipart20170914-4696-1pwrynm.jpg>, @original_filename="Clipboard02.jpg", @content_type="image/jpeg", @headers="Content-Disposition: form-data; name=\"photo[image]\"; filename=\"Clipboard02.jpg\"\r\nContent-Type: image/jpeg\r\n">} permitted: false>, "commit"=>"Save", "controller"=>"photos", "action"=>"create"} permitted: false>

那么在这种情况下，究竟是什么导致了 permitted:false？我还注意到在我的 public/uploads/tmp 中创建了一个文件夹，图像实际上保存在该文件夹中

感谢您的任何建议

Answer 1

在执行 @photo.save 之前，我们需要执行 @photo.valid? 然后检查错误消息 @photo.errors.full_messages

您可以使用绑定撬来检查或将此消息发送到控制台

可能缺少某些字段，因此正在回滚

def create
@photo = Photo.new(photo_params)
# set hear a binding.pry or
@photo.valid?
puts @photo.errors.full_messages    

if @photo.save
  redirect_to photos_path, notice: "The photo #{@photo.name} has been uploaded."
else
  render "new"
end
end

Rails 载波 "action"=>"create"} 允许：false>

Rails Carrierwave "action"=>"create"} permitted: false>

file-upload

ruby-on-rails

image

carrierwave