Rails活动存储-如何将本地文件迁移到s3存储桶

Question

早些时候，我的文件上载到存储文件夹中。但是现在我想在s3存储桶上上传图像。如何迁移s3存储桶上现有的本地数据？

我在这里找到了脚本https://www.stefanwienert.de/blog/2018/11/05/active-storage-migrate-between-providers-from-local-to-amazon/但是得到了一个错误

为活动存储调用私有方法打开

那么，我应该如何将本地数据迁移到s3存储桶呢？

有更简单的方法吗？

Answer 1

嗨，我也遇到了这个错误，我将脚本更改为rake任务，如下所示：

# frozen_string_literal: true

namespace :active_storage do
  desc 'Migrate ActiveStorage files from local to Amazon S3'
  task migrate: :environment do
    module ActiveStorage
      class Downloader
        def initialize(blob, tempdir: nil)
          @blob    = blob
          @tempdir = tempdir
        end

        def download_blob_to_tempfile
          open_tempfile do |file|
            download_blob_to file
            verify_integrity_of file
            yield file
          end
        end

        private

        attr_reader :blob, :tempdir

        def open_tempfile
          file = Tempfile.open(["ActiveStorage-#{blob.id}-", blob.filename.extension_with_delimiter], tempdir)

          begin
            yield file
          ensure
            file.close!
          end
        end

        def download_blob_to(file)
          file.binmode
          blob.download { |chunk| file.write(chunk) }
          file.flush
          file.rewind
        end

        def verify_integrity_of(file)
          raise ActiveStorage::IntegrityError unless Digest::MD5.file(file).base64digest == blob.checksum
        end
      end
    end

    module AsDownloadPatch
      def open(tempdir: nil, &block)
        ActiveStorage::Downloader.new(self, tempdir: tempdir).download_blob_to_tempfile(&block)
      end
    end

    Rails.application.config.to_prepare do
      ActiveStorage::Blob.send(:include, AsDownloadPatch)
    end

    def migrate(from, to)
      configs = Rails.configuration.active_storage.service_configurations
      from_service = ActiveStorage::Service.configure from, configs
      to_service   = ActiveStorage::Service.configure to, configs

      ActiveStorage::Blob.service = from_service

      puts "#{ActiveStorage::Blob.count} Blobs to go..."
      ActiveStorage::Blob.find_each do |blob|
        print '.'
        file = Tempfile.new("file#{Time.now}")
        file.binmode
        file << blob.download
        file.rewind
        checksum = blob.checksum
        to_service.upload(blob.key, file, checksum: checksum)
      rescue Errno::ENOENT
        puts 'Rescued by Errno::ENOENT statement.'
        next
      end
    end

    migrate(:local, :s3)
  end
end