@Repository
public interface TopicRepository extends CrudRepository<Topic, String>{
@Query(value = "SELECT u from topic u where u.name = ?1")
List<Topic> findEverything(String name);
}
According to the spring documentation, I can do the above @query. However, it gives me Caused by: org.hibernate.hql.internal.ast.QuerySyntaxException: topic is not mapped error.
However, when i do this below, it works.
@Repository
public interface TopicRepository extends CrudRepository<Topic, String>{
@Query(value="SELECT * FROM topic WHERE topic.name = ?1", nativeQuery = true)
List<Topic> findEverything(String name);
}
I am using mySQL database. I need to know why. please help me thank you.
if you're using a JPQL query, try to annotate and name your param, instead of relying on positional params, like so:
@Query(value = "SELECT u from topic u where u.name = :name")
List<Topic> findEverything(@Param("name")String name);
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