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The Race Your Rails Validation Cannot Prevent

by Syed Aslam —

A source-backed explanation of why two Rails uniqueness validations can pass concurrently, how a composite unique index arbitrates the inserts, and how Active Record exposes the losing write.

https://railsrevelry.substack.com/p/the-race-your-rails-validation-cannot-prevent?r=4jsb&utm_source=rubyflow&utm_medium=referral&utm_campaign=rails_uniqueness_race

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