服务器日志中的ActiveStorage :: FileNotFoundError（ActiveStorage :: FileNotFoundError），但在控制台中不可复制

Question

我有以下模型：

class Section < ApplicationRecord
  has_many_attached :files
  def to_dir
    [client.to_dir, operation.to_dir, self.name.parameterize].join('/')
  end
  after_save :transload_files

  def transload_files
    TransloadService.sync( self.to_dir, self.files )
  end
end

transload_files方法就是问题。这是转载服务：

class TransloadService

    class << self

        def sync(check_dir, files)
            # First we have to check the transload dir for files that have been deleted on the app
            transloaded_files = Request.list(check_dir)
            cull_list = transloaded_files.reject{ |e| files.map{|t| t.filename }.include? Request.filename(e)}
            if cull_list.count > 0
                Request.trim(cull_list)
                p "#{cull_list.count} files trimed from #{check_dir}."
            end

            # Next we have to upload files which arent present in the transload dir

            send_list = files.reject{ |e| transloaded_files.map{|t| Request.filename(t) }.include? e.filename.to_s }
            if send_list.count > 0
                Request.upload_to(check_dir, send_list)
                p "#{send_list.map{|r| r.filename.to_s}.join(', ')} uploaded to #{check_dir}"
            end
        end

    end

end

这是request.rb中的相关代码

class Request
    class << self
        def upload_to(destination, files)
            files.each do |file|
                send_to = connection.object("#{destination}/#{file.filename}")
                file.open{ |tmp| send_to.upload_file(tmp) }
            end
        end
    end
end

我面临的问题是：after_save回调运行transload_files方法时，它返回ActiveStorage::FileNotFoundError (ActiveStorage::FileNotFoundError)

当我在控制台中运行Section.last.transload_files时，其性能完全符合预期。我在这里想念什么？

Answer 1

经过大约两天的实验，我得出的结论是，尽管创建了ActiveStorage记录，但在任何模型回调中它都将不可用。正式的AS文档引用了after-create-commit回调here，但是像所包含的示例一样，我无法调用blob.open或blob.download。但是，可以从控制台运行。