phpBB3 导入在当前 Discourse 版本中因 Zeitwerk::NameError 而失败

迁移
1

我正在尝试按照官方迁移指南导入 phpBB3 论坛，但导入脚本立即因 Zeitwerk::NameError 而失败。

环境

  • Discourse 版本：v2026.2.0-latest-324（也尝试了 stable/esr 分支）
  • 安装方式：基于 Docker 的导入容器
  • 之前情况：在 2026 年 1 月初成功导入了同一个 phpBB 论坛，没有出现问题

错误信息

/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/zeitwerk-2.7.3/lib/zeitwerk/loader/callbacks.rb:31:in 'Zeitwerk::Loader::Callbacks#on_file_autoloaded': expected file /var/www/discourse/lib/freedom_patches/safe_migrations.rb to define constant FreedomPatches::SafeMigrations, but didn't (Zeitwerk::NameError)
点击展开完整的错误追踪 
discourse@vps116136-import-from-app:/var/www/discourse/script/import_scripts$ bundle exec ruby phpbb3.rb /shared/import/settings.yml
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/zeitwerk-2.7.3/lib/zeitwerk/loader/callbacks.rb:31:in 'Zeitwerk::Loader::Callbacks#on_file_autoloaded': expected file /var/www/discourse/lib/freedom_patches/safe_migrations.rb to define constant FreedomPatches::SafeMigrations, but didn't (Zeitwerk::NameError)

      raise Zeitwerk::NameError.new(msg, cref.cname)
      ^^^^^
        from /var/www/discourse/vendor/bundle/ruby/3.4.0/gems/zeitwerk-2.7.3/lib/zeitwerk/core_ext/kernel.rb:27:in 'Kernel#require'
        from /var/www/discourse/config/initializers/002-freedom_patches.rb:11:in 'block (2 levels) in <main>'
        from /var/www/discourse/config/initializers/002-freedom_patches.rb:9:in 'Array#each'
        from /var/www/discourse/config/initializers/002-freedom_patches.rb:9:in 'block in <main>'
        from /var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.4/lib/active_support/callbacks.rb:406:in 'BasicObject#instance_exec'
        from /var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.4/lib/active_support/callbacks.rb:406:in 'block in ActiveSupport::Callbacks::CallTemplate::InstanceExec0#make_lambda'
        from /var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.4/lib/active_support/callbacks.rb:178:in 'block in ActiveSupport::Callbacks::Filters::Before#call'
        from /var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.4/lib/active_support/callbacks.rb:668:in 'block (2 levels) in ActiveSupport::Callbacks::CallbackChain#default_terminator'
        from /var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.4/lib/active_support/callbacks.rb:667:in 'Kernel#catch'
        from /var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.4/lib/active_support/callbacks.rb:667:in 'block in ActiveSupport::Callbacks::CallbackChain#default_terminator'
        from /var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.4/lib/active_support/callbacks.rb:179:in 'ActiveSupport::Callbacks::Filters::Before#call'
        from /var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.4/lib/active_support/callbacks.rb:559:in 'block in ActiveSupport::Callbacks::CallbackSequence#invoke_before'
        from /var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.4/lib/active_support/callbacks.rb:559:in 'Array#each'
        from /var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.4/lib/active_support/callbacks.rb:559:in 'ActiveSupport::Callbacks::CallbackSequence#invoke_before'
        from /var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.4/lib/active_support/callbacks.rb:108:in 'ActiveSupport::Callbacks#run_callbacks'
        from /var/www/discourse/vendor/bundle/ruby/3.4.0/gems/activesupport-8.0.4/lib/active_support/reloader.rb:96:in 'ActiveSupport::Reloader.prepare!'
        from /var/www/discourse/vendor/bundle/ruby/3.4.0/gems/railties-8.0.4/lib/rails/application/finisher.rb:73:in 'block in <module:Finisher>'
        from /var/www/discourse/vendor/bundle/ruby/3.4.0/gems/railties-8.0.4/lib/rails/initializable.rb:32:in 'BasicObject#instance_exec'
        from /var/www/discourse/vendor/bundle/ruby/3.4.0/gems/railties-8.0.4/lib/rails/initializable.rb:32:in 'Rails::Initializable::Initializer#run'
        from /var/www/discourse/vendor/bundle/ruby/3.4.0/gems/railties-8.0.4/lib/rails/initializable.rb:61:in 'block in Rails::Initializable#run_initializers'
        from /var/www/discourse/vendor/bundle/ruby/3.4.0/gems/tsort-0.2.0/lib/tsort.rb:231:in 'block in TSort.tsort_each'
        from /var/www/discourse/vendor/bundle/ruby/3.4.0/gems/tsort-0.2.0/lib/tsort.rb:353:in 'block (2 levels) in TSort.each_strongly_connected_component'
        from /var/www/discourse/vendor/bundle/ruby/3.4.0/gems/tsort-0.2.0/lib/tsort.rb:434:in 'TSort.each_strongly_connected_component_from'
        from /var/www/discourse/vendor/bundle/ruby/3.4.0/gems/tsort-0.2.0/lib/tsort.rb:352:in 'block in TSort.each_strongly_connected_component'
        from /var/www/discourse/vendor/bundle/ruby/3.4.0/gems/tsort-0.2.0/lib/tsort.rb:350:in 'Rails::Initializable::Collection#each'
        from /var/www/discourse/vendor/bundle/ruby/3.4.0/gems/tsort-0.2.0/lib/tsort.rb:350:in 'Method#call'
        from /var/www/discourse/vendor/bundle/ruby/3.4.0/gems/tsort-0.2.0/lib/tsort.rb:350:in 'TSort.each_strongly_connected_component'
        from /var/www/discourse/vendor/bundle/ruby/3.4.0/gems/tsort-0.2.0/lib/tsort.rb:229:in 'TSort#tsort_each'
        from /var/www/discourse/vendor/bundle/ruby/3.4.0/gems/tsort-0.2.0/lib/tsort.rb:208:in 'TSort#tsort_each'
        from /var/www/discourse/vendor/bundle/ruby/3.4.0/gems/railties-8.0.4/lib/rails/initializable.rb:60:in 'Rails::Initializable#run_initializers'
        from /var/www/discourse/vendor/bundle/ruby/3.4.0/gems/railties-8.0.4/lib/rails/application.rb:444:in 'Rails::Application#initialize!'
        from /var/www/discourse/config/environment.rb:7:in '<top (required)>'
        from /var/www/discourse/script/import_scripts/base.rb:16:in 'Kernel#require_relative'
        from /var/www/discourse/script/import_scripts/base.rb:16:in '<top (required)>'
        from /var/www/discourse/script/import_scripts/phpbb3/support/settings.rb:5:in 'Kernel#require_relative'
        from /var/www/discourse/script/import_scripts/phpbb3/support/settings.rb:5:in '<top (required)>'
        from phpbb3.rb:17:in 'Kernel#require_relative'
        from phpbb3.rb:17:in '<module:PhpBB3>'
        from phpbb3.rb:16:in '<module:ImportScripts>'
        from phpbb3.rb:15:in '<main>'

我尝试过的方法

  1. 不同的 Discourse 版本：测试了 latest、stable 和 esr 分支——都以相同的错误失败。
  2. 不同的 Rails 环境：尝试了 RAILS_ENV=production 和 RAILS_ENV=development。
  3. 重新构建容器：多次销毁并重建导入容器。
  4. Bundle install：使用 bundle install 更新了依赖项。

根本原因分析

文件 /var/www/discourse/lib/freedom_patches/safe_migrations.rb 仅在 RAILS_ENV != "production" 时定义 SafeMigrations 常量：

if ENV["RAILS_ENV"] != "production"
  require_dependency "migration/safe_migrate"
  Migration::SafeMigrate.patch_active_record!
end

然而，初始化器 /var/www/discourse/config/initializers/002-freedom_patches.rb 尝试无条件地要求（require）此文件，在生产模式下导致了 Zeitwerk 错误。

问题

  1. 最近的 Discourse 版本中是否有人遇到过此问题？
  2. 是否有已知的解决方法或修复？
  3. 目前推荐用于 phpBB 导入的 Discourse 版本是哪个？

事实上，它在 1 月份有效但现在失败了，这表明 Discourse 核心中最近发生了影响导入的破坏性更改。任何指导都将不胜感激！