使用RubyMine调试Ruby on Rails遇加载问题求助（Ruby2.3.3/Rails5.1.6）

Hey there, let’s work through this Rails file loading issue you’re hitting in RubyMine. I’ve dealt with similar headaches using older Ruby/Rails combinations, so here are practical steps to get things sorted:

• Open RubyMine and head to File > Settings > Languages & Frameworks > Ruby SDK and Gems (on macOS, it’s RubyMine > Preferences > ... instead).
• Confirm the selected SDK is exactly your Ruby 2.3.3 installation—sometimes RubyMine accidentally picks up a system Ruby or a different version from your version manager.
• Look for the rails gem (version 5.1.6) in the list of installed gems under that SDK. If it’s missing, run gem install rails -v 5.1.6 in your terminal, then click the refresh icon in RubyMine’s gem list to update it.

• If you use rbenv, rvm, or another version manager, make sure RubyMine is using the same gemset/environment as your terminal. The IDE usually detects .ruby-version or .rvmrc files, but it never hurts to verify.
• Open RubyMine’s built-in terminal (bottom toolbar > Terminal) and run bundle install. Missing or mismatched gems are a super common cause of file loading failures in Rails projects.
• After running bundler, check that the Gemfile.lock reflects Rails 5.1.6 and Ruby 2.3.3 correctly.

• Stale cache files are the bane of IDE weirdness. Go to File > Invalidate Caches..., check all the boxes, and click Invalidate and Restart.
• Once RubyMine reopens, let it finish reindexing the project (you’ll see a progress bar in the bottom right). This forces the IDE to re-scan all your Rails files and rebuild its internal references.

• Go to Run > Edit Configurations to pull up your debug settings.
• For your Rails debug profile, confirm:
  • The Ruby SDK is set to your 2.3.3 installation.
  • The Working directory points directly to your project’s root folder.
  • The Environment is set to development (or whichever environment you’re trying to debug in).

• Run rails server in your regular terminal (not RubyMine’s). If your app fails to start here, the problem is with your project setup, not the IDE. Fix those terminal errors first, then come back to RubyMine.
• If the server runs fine outside the IDE, the issue is definitely isolated to RubyMine’s configuration, so focus on the steps above.

• If all else fails, corrupted IDE config files might be the culprit. Close RubyMine, rename the .idea folder in your project root to .idea_old, then reopen the project. RubyMine will recreate the configuration files from scratch, which often fixes stubborn issues.

内容的提问来源于stack exchange，提问作者jackmin