当您有多个上传时，Carrierwave需要一个数组。这由您传递给mount_uploaders的名称决定：
请确保使用write（mount_uploaders）而不是（mount_uploader）装载上载程序，以避免在上载多个文件时出错
确保你的文件输入字段被设置为多个文件字段。例如在Rails中，你会想做类似这样的事情：
<%= form.file_field :avatars, multiple: true %>个
此外，确保上传控制器允许多文件上传属性，指向散列中的空数组。例如：
params.require(:user).permit(:email, :first_name, :last_name, {avatars: []})
请访问：https://github.com/carrierwaveuploader/carrierwave#multiple-file-uploads

@product = Product.create(
  # ActiveModel does not really care if you mix string and symbol keys
  row.slice(
    'name', 'active', 'costprice', 'category_id', 
    'price', 'provider', 'tipo', 'description'
  ).merge(
    images: ["square-1.jpg"]
  )
end

def self.my_import(file)
    CSV.foreach(file.path, headers: true) do |row|
      images = "https://" + row['images']
      uploader = ImagesUploader.new
      uploader.download! images
      output = uploader.store!(images)

      @product = Product.new(
        name: row['name'],
        active: row['active'],
        costprice: row['costprice'],
        category_id: row['category_id'],
        price: row['price'],
        provider: row['provider'],
        tipo: row['tipo'],
        description: row['description'],
        images: [uploader]
      )

      puts @product.images

      @product.save
      if @product.save
        puts "Saved!"
      else
        puts @product.errors.full_messages
      end
    end
  end