Rails 5 Fog CarrierWave 照片上傳到 Amazon S3 沒有將字符串隱式轉換為數組

Question

我是 Ruby on Rails 的絕對初學者。 我遇到了一個錯誤，不知道如何處理。

我想要做什么：將照片上傳到 Amazon S3 存儲桶。

錯誤：沒有將 Array 隱式轉換為 String 。

當@prototype.save 在prototypes_controller.rb 中的prototype#create 操作失敗時出現錯誤

問題：為了解決這個問題，我應該在什么時候將 Array 轉換為 String？

Webrick 服務器中顯示的參數。

{"utf8"=>"✓",
 "prototype"=>
   {"name"=>"dafda",
    "prototype_images_attributes"=>
      {"0"=>
        {"content"=>
           #<ActionDispatch::Http::UploadedFile:0x007fe07491b778
           @content_type="image/jpeg",
           @headers="Content-Disposition: form-data; name=\"prototype[prototype_images_attributes][0][content]\"; filename=\"card100002057_1.jpg\"\r\nContent-Type: image/jpeg\r\n",
           @original_filename="card100002057_1.jpg",
           @tempfile=#<File:/var/folders/yy/42bpgmdj4t16rf0_5xsly3tc0000gp/T/RackMultipart20170815-70968-fzdoey.jpg>>,
        "status"=>"main"},
       "1"=>{"status"=>"sub"},
       "2"=>{"status"=>"sub"}},
    "catchcopy"=>"fdafda",
    "concept"=>"fdafda"},
  "commit"=>"Publish"}

以下是可能與錯誤有關的文件。

原型控制器.rb

def create
  @prototype = current_user.prototypes.new(prototype_params)

  if @prototype.save
    flash[:notice] = 'Prototype was successfully created.'
    redirect_to root_path
  else
    flash[:alert] = 'Prototype was not successfully created.'
    render :new
  end
end

private
def prototype_params
  params.require(:prototype)
    .permit(:name,
            :catchcopy,
            :concept,
            prototype_images_attributes: [:content, :status]
    )
end

def set_prototype
  @prototype = Prototype.find(params[:id]).decorate
end

prototype_image_uploader.rb

class PrototypeImageUploader < CarrierWave::Uploader::Base
  storage :fog

  def store_dir
    'uploads'
  end

  def extension_whitelist
    %w(jpg jpeg gif png)
  end
end

配置/初始化程序/carrierwave.rb

require 'carrierwave/storage/abstract'
require 'carrierwave/storage/file'
require 'carrierwave/storage/fog'

CarrierWave.configure do |config|
  config.storage = :fog
  config.fog_credentials = {
    provider: 'AWS',
    aws_access_key_id: ENV['AWS_ACCESS_KEY_ID'],
    aws_secret_access_key: ENV['AWS_SECRET_ACCESS_KEY'],
    region: 'ap-northeast-1'
  }

  case Rails.env
    when 'production'
      config.fog_directory = ENV['S3_BUCKET'],
      config.asset_host = ENV['S3_BUCKET_HOST']
    when 'development'
      config.fog_directory = ENV['S3_BUCKET'],
      config.asset_host = ENV['S3_BUCKET_HOST']
    when 'test'
      config.storage = :file
  end
end

回溯

{"utf8"=>"✓",
 "prototype"=>
   {"name"=>"dafda",
    "prototype_images_attributes"=>
      {"0"=>
        {"content"=>
           #<ActionDispatch::Http::UploadedFile:0x007fe07491b778
           @content_type="image/jpeg",
           @headers="Content-Disposition: form-data; name=\"prototype[prototype_images_attributes][0][content]\"; filename=\"card100002057_1.jpg\"\r\nContent-Type: image/jpeg\r\n",
           @original_filename="card100002057_1.jpg",
           @tempfile=#<File:/var/folders/yy/42bpgmdj4t16rf0_5xsly3tc0000gp/T/RackMultipart20170815-70968-fzdoey.jpg>>,
        "status"=>"main"},
       "1"=>{"status"=>"sub"},
       "2"=>{"status"=>"sub"}},
    "catchcopy"=>"fdafda",
    "concept"=>"fdafda"},
  "commit"=>"Publish"}
User Load (0.4ms)  SELECT  `users`.* FROM `users` WHERE `users`.`id` = 2 ORDER BY `users`.`id` ASC LIMIT 1
     BEGIN
   SQL (0.3ms)  INSERT INTO `prototypes` (`name`, `catchcopy`, 
`concept`, `created_at`, `updated_at`, `user_id`) VALUES ('fdfad', 
 'fdfad', 'fdfd', '2017-08-15 13:05:29', '2017-08-15 13:05:29', 2)
  SQL (0.2ms)  INSERT INTO `prototype_images` (`content`, 
 `prototype_id`, `created_at`, `updated_at`, `status`) VALUES 
 ('13248473_1049158575176323_1670750882476661352_o.jpg', 56, '2017-08-
 15 13:05:29', '2017-08-15 13:05:29', 0)
 (0.6ms)  ROLLBACK
 Completed 500 Internal Server Error in 32ms (ActiveRecord: 2.0ms)

 TypeError (no implicit conversion of Array into String):

 app/controllers/prototypes_controller.rb:24:in `create'

如果有人遇到下面的錯誤，你能給我一些線索嗎？ 任何建議將不勝感激！ 提前致謝！

Answer 1

我建議您在CarrierWave.configure塊中添加以下幾行：

  config.ignore_integrity_errors = false
  config.ignore_processing_errors = false
  config.ignore_download_errors = false

它可以幫助獲得更容易理解的錯誤。

Answer 2

看一下設置fog_directory行

config.fog_directory = 'my_bucket_name',

看到最后那個逗號了嗎？ 它把它變成一個數組。

當fog_credentials位設置為需要在每行末尾使用逗號的對象時，很容易犯錯誤。