一年多前，我曾开发过一个 Ruby on Rails 应用程序，该应用程序最初设置为在 Heroku Stack 18 上运行，但我现在了解到该应用程序已被弃用。我试图让该应用程序在较新的堆栈上再次运行，但每当我尝试向上推送时，它都会告诉我 Ruby 版本（2.5.1）不存在。我希望了解如何升级我的 Ruby/Rails 版本，这样我就不需要再次从头开始创建项目。预先感谢。
当运行推送到heroku 远程时，我得到以下输出：
Preparing app for Rails asset pipeline
remote: Running: rake assets:precompile
remote: rake aborted!
remote: ArgumentError: wrong number of arguments (given 3, expected 2)
remote: /tmp/build_fbf58a0c/vendor/bundle/ruby/3.2.0/gems/actionpack-5.2.8.1/lib/action_dispatch/middleware/static.rb:111:in `initialize'
remote: /tmp/build_fbf58a0c/vendor/bundle/ruby/3.2.0/gems/actionpack-5.2.8.1/lib/action_dispatch/middleware/stack.rb:37:in `new'
remote: /tmp/build_fbf58a0c/vendor/bundle/ruby/3.2.0/gems/actionpack-5.2.8.1/lib/action_dispatch/middleware/stack.rb:37:in `build'
remote: /tmp/build_fbf58a0c/vendor/bundle/ruby/3.2.0/gems/actionpack-5.2.8.1/lib/action_dispatch/middleware/stack.rb:101:in `block in build'
remote: /tmp/build_fbf58a0c/vendor/bundle/ruby/3.2.0/gems/actionpack-5.2.8.1/lib/action_dispatch/middleware/stack.rb:101:in `each'
remote: /tmp/build_fbf58a0c/vendor/bundle/ruby/3.2.0/gems/actionpack-5.2.8.1/lib/action_dispatch/middleware/stack.rb:101:in `inject'
remote: /tmp/build_fbf58a0c/vendor/bundle/ruby/3.2.0/gems/actionpack-5.2.8.1/lib/action_dispatch/middleware/stack.rb:101:in `build'
remote: /tmp/build_fbf58a0c/vendor/bundle/ruby/3.2.0/gems/railties-5.2.8.1/lib/rails/engine.rb:510:in `block in app'
remote: /tmp/build_fbf58a0c/vendor/bundle/ruby/3.2.0/gems/railties-5.2.8.1/lib/rails/engine.rb:506:in `synchronize'
remote: /tmp/build_fbf58a0c/vendor/bundle/ruby/3.2.0/gems/railties-5.2.8.1/lib/rails/engine.rb:506:in `app'
remote: /tmp/build_fbf58a0c/vendor/bundle/ruby/3.2.0/gems/railties-5.2.8.1/lib/rails/application/finisher.rb:47:in `block in <module:Finisher>'
remote: /tmp/build_fbf58a0c/vendor/bundle/ruby/3.2.0/gems/railties-5.2.8.1/lib/rails/initializable.rb:32:in `instance_exec'
remote: /tmp/build_fbf58a0c/vendor/bundle/ruby/3.2.0/gems/railties-5.2.8.1/lib/rails/initializable.rb:32:in `run'
remote: /tmp/build_fbf58a0c/vendor/bundle/ruby/3.2.0/gems/railties-5.2.8.1/lib/rails/initializable.rb:61:in `block in run_initializers'
remote: /tmp/build_fbf58a0c/vendor/bundle/ruby/3.2.0/gems/railties-5.2.8.1/lib/rails/initializable.rb:60:in `run_initializers'
remote: /tmp/build_fbf58a0c/vendor/bundle/ruby/3.2.0/gems/railties-5.2.8.1/lib/rails/application.rb:361:in `initialize!'
remote: /tmp/build_fbf58a0c/config/environment.rb:5:in `<main>'
remote: <internal:/tmp/build_fbf58a0c/vendor/ruby-3.2.2/lib/ruby/3.2.0/rubygems/core_ext/kernel_require.rb>:37:in `require'
remote: <internal:/tmp/build_fbf58a0c/vendor/ruby-3.2.2/lib/ruby/3.2.0/rubygems/core_ext/kernel_require.rb>:37:in `require'
remote: /tmp/build_fbf58a0c/vendor/bundle/ruby/3.2.0/gems/bootsnap-1.16.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:32:in `require'
remote: /tmp/build_fbf58a0c/vendor/bundle/ruby/3.2.0/gems/railties-5.2.8.1/lib/rails/application.rb:337:in `require_environment!'
remote: /tmp/build_fbf58a0c/vendor/bundle/ruby/3.2.0/gems/railties-5.2.8.1/lib/rails/application.rb:520:in `block in run_tasks_blocks'
remote: /tmp/build_fbf58a0c/vendor/bundle/ruby/3.2.0/gems/sprockets-rails-3.4.2/lib/sprockets/rails/task.rb:61:in `block (2 levels) in define'
remote: Tasks: TOP => environment
remote: (See full trace by running task with --trace)
remote:
remote: !
remote: ! Precompiling assets failed.
remote: !
remote: ! Push rejected, failed to compile Ruby app.
remote:
remote: ! Push failed
看起来 Heroku 上支持的最旧的 Ruby 版本是 3.0.6 在 Heroku-20 上，而您使用的是 Rails 5.2。根据这个兼容性表，Ruby 3 应该达到 Rails 6.1。
对于 Rails 升级，最好遵循 官方指南，逐个版本进行升级并确保正确的行为。
对于 Ruby 来说也是如此，我推荐本指南，检查从一个版本到另一个版本的更改，并在必要时修改您的代码。