我正在使用rails 5.2，Shrine 2.19和tus server 2.3来上传文件
routes.rb

mount Tus::Server => '/files'

model，file_resource.rb

class FileResource < ApplicationRecord
  # adds an `file` virtual attribute
  include ResumableFileUploader::Attachment.new(:file)

controllers/files_controller.rb

def create
      file = FileResource.new(permitted_params)
      ...
      file.save

config/initializers/shrine.rb

s3_options = {
  bucket: ENV['S3_MEDIA_BUCKET_NAME'],
  access_key_id: ENV['S3_ACCESS_KEY'],
  secret_access_key: ENV['S3_SECRET_ACCESS_KEY'],
  region: ENV['S3_REGION']
}

Shrine.storages = {
  cache: Shrine::Storage::S3.new(prefix: 'file_library/shrine_cache', **s3_options),
  store: Shrine::Storage::S3.new(**s3_options), # public: true,
  tus: Shrine::Storage::Tus.new
}

Shrine.plugin :activerecord
Shrine.plugin :cached_attachment_data

config/initializers/tus.rb

Tus::Server.opts[:storage] = Tus::Storage::S3.new(
  prefix: 'file_library',
  bucket: ENV['S3_MEDIA_BUCKET_NAME'],
  access_key_id: ENV['S3_ACCESS_KEY'],
  secret_access_key: ENV['S3_SECRET_ACCESS_KEY'],
  region: ENV['S3_REGION'],
  retry_limit: 3
)
Tus::Server.opts[:redirect_download] = true

我的问题是我不能覆盖Shrine类的generate_location方法来将文件存储在AWS s3中的不同文件夹结构中。
所有文件都在s3://bucket/file_library/（tus.rb中提供的前缀）中创建。我想要类似s3://bucket/file_library/:user_id/:parent_id/文件夹结构的东西。
我发现Tus配置覆盖了我所有的resumable_file_uploader类自定义选项，对上传没有影响。
可上传文件.rb

class ResumableFileUploader < Shrine
  plugin :validation_helpers  # NOT WORKS
  plugin :pretty_location     # NOT WORKS

  def generate_location(io, context = {})  # NOT WORKS
    f = context[:record]
    name = super # the default unique identifier

    ['users', f.author_id, f.parent_id, name].compact.join('/')
  end

  Attacher.validate do                    # NOT WORKS
    validate_max_size 15 * 1024 * 1024, message: 'is too large (max is 15 MB)'
  end

end

那么，我如何在S3中使用tus选项创建自定义文件夹结构（因为shrine选项不起作用）？