عرض عملي: تشخيص عطل في الإنتاج من السجلات

خطوة بخطوة

1. A user reports "orders fail". Note the time and find the logs.
2. Locate the first ERROR; read the "Caused by" chain to the root cause.
3. Reproduce locally by creating the same data in a test.
4. Write the failing regression test, then fix the code, then run the test.
5. Planned mistake: changing the config and the code at the same time; revert one so you know which change fixed it.
6. Write a short bug report with root cause, fix, and test.