Controller Me Business Logic Likhna Galat Kyun Hai? | Day 3 Backend #shortsfeed #youtubeshorts

Day 3 of my backend learning journey.

Aaj samjha:
- Controller layer ka actual role kya hota hai
- Business logic service layer me kyun rakhte hain
- JPA Repository kaise database ke sath kaam karti hai
- findBy methods SQL kaise generate kar dete hain
- JPQL aur query parameters kaha fail ho jaate hain

Spring Boot backend sirf code likhne ka naam nahi hai.
Architecture aur debugging samajhna equally important hai.

Day 4 me aur real backend problems aane wali hain.

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Видео Controller Me Business Logic Likhna Galat Kyun Hai? | Day 3 Backend #shortsfeed #youtubeshorts канала FuturisticCoder_Official