如何解决Sorbet在Rails项目中无法解析常量RSpec的问题？

Got it, let's tackle this Sorbet error you're seeing after adding RSpec to your Rails project. The core issue is that Sorbet doesn't automatically recognize RSpec's constants or know where to look for its type definitions out of the box. Here's how to fix it step by step:

• Generate RSpec type definitions (RBIs) for Sorbet
  Sorbet relies on RBI files to understand external gem constants. Run this command to generate RBIs specifically for RSpec gems:

  srb rbi gems rspec-core rspec-expectations rspec-mocks
  

  Alternatively, if you want to generate RBIs for all installed gems at once, use:

  srb rbi gems
  

  This creates the necessary type stubs so Sorbet knows what RSpec is.

• Update Sorbet's config to include the spec directory
  Open your config/sorbet/config file and add the --dir spec flag. This tells Sorbet to scan and process files in the spec directory, which it might be ignoring by default. Your config should look something like this:

  --dir app
  --dir config
  --dir spec
  --dir lib
  --typed true
  

• Verify your spec_helper.rb has the correct type annotation
  At the top of spec/spec_helper.rb, make sure you have a type annotation (even # typed: true works). This tells Sorbet to process the file with type checking:

  # typed: true
  require 'rspec/rails'
  
  RSpec.configure do |config|
    # ... your config here
  end
  

• Optional: Temporary workaround if issues persist
  If you need a quick fix while sorting out the RBIs or config, you can wrap the RSpec reference in T.unsafe to tell Sorbet to skip type checking for that line:

  T.unsafe(RSpec).configure do |config|
    # ...
  end
  

  Note: This is a band-aid solution—focus on the first two steps for a proper fix.

After running these steps, re-run srb tc and the "Unable to resolve constant RSpec" error should be gone.

内容的提问来源于stack exchange，提问作者steel