transactions

Inventory systems are concurrency systems. Lock the row, verify available quantity, then write the reservation in the same transaction. It’s the simplest correct starting point.

Deadlocks happen under load. When the operation is safe to retry, rescue the deadlock exception and retry with jitter. Keep retries bounded and log when it happens.

Database transactions ensure data integrity when multiple operations must succeed or fail together. I use @transaction.atomic on views or functions to wrap them in a transaction. For partial rollbacks, I use transaction.atomic() as a context manager a

The atomic decorator/context manager ensures all-or-nothing database operations. I wrap related operations in @transaction.atomic or with transaction.atomic() blocks. If any operation fails, the entire transaction rolls back. This prevents partial dat