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kotlin-backend-jpa-entity-mapping

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Model Kotlin persistence code correctly for Spring Data JPA and Hibernate. Covers entity design, identity and equality, uniqueness constraints, relationships, fetch plans, and common ORM (Object-Relational Mapping) traps specific to Kotlin. Use when creating or reviewing JPA (Java Persistence API) entities, diagnosing N+1 or LazyInitializationException, placing indexes and uniqueness rules, or preventing Kotlin-specific bugs such as data class entities and broken equals/hashCode.

When to use

• creating JPA entities
• reviewing JPA entities
• diagnosing N+1 queries
• diagnosing LazyInitializationException
• placing indexes and uniqueness rules
• preventing data class entity bugs
• fixing broken equals/hashCode

Skill page

Source