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prisma-bug-reproduction

An issue where running multiple findUnique queries with non unique values (extendedWhereUnique) concurrently on a model with a compound unique constraint will cause prisma to return null instead of the record.

  • Only occurs with findUnique and when using extendedWhereUnique
  • Only occurs when the model has a @@unique() constraint
  • Only occurs when findUnique queries are run concurrently

How to reproduce

  1. Clone this repo.
  2. Create the .env file and add the DATABASE_URL env var.
  3. Run yarn or npm install.
  4. Run yarn prisma migrate dev or npm run prisma migrate dev.
  5. Run yarn dev or npm run dev.