[fix] Spring Boot Data JPA - No identifier specified for entity

If you are using Spring Boot + Spring Data or JPA and you get the below exception,

Exception Stack:
Caused by: org.hibernate.AnnotationException: No identifier specified for entity: 
        at org.hibernate.cfg.InheritanceState.determineDefaultAccessType(InheritanceState.java:264) 
        at org.hibernate.cfg.InheritanceState.getElementsToProcess(InheritanceState.java:209) 
        at org.hibernate.cfg.AnnotationBinder.bindClass(AnnotationBinder.java:676)


As you can read from the Stacktrace that it is an AnnotationException, so either you have missed adding @ID annotation to your entity or you have made use of the wrong @ID import.


Replace: import org.springframework.data.annotation.Id; with import jakarta.persistence.Id;

Spring Boot Fix - No identifier specified for entity exception


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