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Race conditions can cause p...
Setup your development environment.
Configure your production server.
Learn how to modify production to run websockets.
When things (users, jobs, etc) attempt to update the same record at the same time, we can often lose changes. Optimistic locking uses a lock version number to warn you about updating stale objects so you can handle that safely.
Track errors in Rails, Sidekiq, etc in production for free using the open source Errbit app and the Airbrake gem
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