Database Transactions, Done Properly
Grouping database operations so they either all succeed or all fail, keeping data consistent.
Marcus Adeyemi
Where most projects go wrong
The usual mistakes:
- API calls inside open transactions
- Transactions spanning user interaction
- Ignoring rollback handling
- Assuming default isolation fits every case
What good looks like instead
- Wrap related writes in transactions
- Keep transactions short
- Handle deadlock retries
- Avoid external calls inside transactions
- Test failure paths
Why it matters
Without transactions, interrupted operations leave half-finished data such as orders without payments.
The specs that matter
| Measure | Figure |
|---|---|
| Atomicity | all operations in a transaction succeed or none do |
| Isolation levels | control what concurrent transactions can see |
| Deadlocks | occur when transactions wait on each other |
| Long transactions | hold locks and block other work |
Knowing when to hand it over
Tip: Bring in help when data inconsistencies appear after failures.
Where this comes from
- Laravel Documentation — Database transactions
- Microsoft Learn — Transactions
The figures and practices above come from the sources listed.
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