Spring JPA :: No converter found capable of converting from type

Question

I am using spring with JPA and trying to execute query using @query with SQL query.and trying to map the result to an object. I have different entity class and mapping to other

Answer 1

If you are still looking for an answer, here is how I did

@Data
@NoArgsConstructor
@AllArgsConstructor
public class StatsDTO {
    private Integer userCount;
    private Byte typeId;
    private Instant modifiedAt;
}

and your query should be like this

public interface UserRepository extends CrudRepository {
    @Query(value = "select new com.example.package.StatsDTO(count(type_id) userCount, typeId, modifiedAt from "
                + "UserCampaignObjective where campId = ?1 group by objectiveTypeId,modifiedAt")

        List getStatsDTO(Long camp_id);
}

make sure you have a constructor present in StatsDTO to map all fields.