Spring Boot - Advanced Patterns
What problem arises if a Spring Boot repository is implemented as a concrete class instead of extending JpaRepository interface?
What problem arises if a Spring Boot repository is implemented as a concrete class instead of extending JpaRepository interface?
medium📝 Debug Q6 of 15
Step-by-Step Solution
Solution:
Step 1: Understand JpaRepository role
JpaRepository provides default implementations for CRUD operations.Step 2: Consequence of concrete class
Implementing a concrete class bypasses Spring Data's auto-implementation features.Final Answer:
Spring Data JPA features like CRUD methods won't be auto-implemented -> Option BQuick Check:
JpaRepository interface enables auto CRUD methods [OK]
Quick Trick: Repositories must extend JpaRepository for auto CRUD [OK]
Common Mistakes:
- Assuming concrete classes get auto CRUD methods
- Believing missing annotations cause startup failure here
- Confusing repository with service bean
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