Transactions in NestJS and TypeORM Without Passing the EntityManager Around

In NestJS applications using TypeORM, transactions can fail silently if the EntityManager is not passed correctly through repository layers, leading to incomplete rollbacks without errors. This issue occurs when specific repositories remain outside the transaction scope, often remaining undetected during mocked tests. To eliminate this class of failure, the provided approach ensures that transactions open at a single point, specifically within the controller handling the request, ensuring all subsequent operations remain consistent and atomic.