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[ARTICLE · art-108337] src=dev.to ↗ pub= topic=developer-tools verified=true sentiment=· neutral

The Joy of Old-School Coding After a Stupid Mistake

A developer recounts debugging an Entity Framework Core mapping error, where a one-to-one relationship was incorrectly mapped using a collection, and only integration tests caught the issue. The developer initially considered using AI tools like Copilot but resolved the problem with a one-line code change, reflecting on the satisfaction of old-school debugging.

read1 min views1 publishedAug 24, 2026

The other day, it happened again.

I had an error message that made me scratch my head.

For a moment, I thought, "God, why am I doing this? I should start a garden or something." I copy-pasted the error message into Google.

StackOverflow didn't help that much.

I was tempted to go to Copilot. But I held my horses.

A few moments later, "Oooohh, here it is!"

A one-line code change fixed it.

Stupid Entity Framework Core!

I was in a rush a few days before and I missed a small detail:

I used a collection to map a one-to-one relationship. Simple! I know. Only integration tests caught it.

For a moment, an error message made me want to quit. A second later, I was back in the game.

Yet again. For the nth time.

I guess AI doesn't give you that feeling—or does it?

Whether you code the old way or with AI, check out Street-Smart Coding—It covers debugging, testing, and many 28 more lessons to help you code like a pro.

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