Logging Errors Effectively

GrapeLogging has its own begin-rescue which will catch any exceptions, log them, and then re-raise them. This can create either double/incorrect output in the logs. To fix this, just insert GrapeLogging after Rack::Head.

class Base < Grape::API
  # ...

  # instead of `use`
  insert_after(
    Rack::Head,
    GrapeLogging::Middleware::RequestLogger,
    # ...
  )

  # ...
end

This will allow you to log the error responses the same way as the success responses. You will need to make sure you have a rescue_from(:all) handler in your APIs, otherwise any uncaught exceptions will be handled by GrapeLogging and produce inconsistent log entries.