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.