Spring Data JPA - Pass column name and value as parameters

Question

I just wanted to know how to pass column name and its value to @Query annotation in Spring Data JPA.

Basically column names will be static and we used to put every c

Answer 1

Take a look at sping data Specifications. You can find your solution there!
Reading the docs you can see that if Calendar is your domain (I would try to find a different name for my domain, there is a Calendar class in Java SE already), then you could use something like the above,

@Repository
public interface CalendarRepository extends JpaRepository<Calendar, Integer>, JpaSpecificationExecutor<Calendar> {
}


public class CalendarSpecification implements Specification<Calendar> {

    private String randomColumnName; // A varchar column.
    private String valueToSearchFor;

    public CalendarSpecification(String randomColumnName, String valueToSearchFor) {
        this.randomColumnName = randomColumnName;
        this.valueToSearchFor = valueToSearchFor;
    }

    @Override
    public Predicate toPredicate(Root<Calendar> root, CriteriaQuery<?> query, CriteriaBuilder builder) {
        return builder.and(builder.equal(root.<String>get(this.randomColumnName), this.valueToSearchFor));
    }
}


@Service
public class CalendarService {

    @Autowired
    private CalendarRepository calendarRepository;

    public List<Calendar> findCustom(String randomColumnName, String valueToSearchFor) {
        CalendarSpecification cs = new CalendarSpecification(randomColumnName, valueToSearchFor);
        return calendarRepository.find(cs);
        // Or using lambda expression - without the need of CalendarSpecification class.
//      return calendarRepository.find((Root<ProductCategory> root, CriteriaQuery<?> query, CriteriaBuilder builder) -> {
//          return builder.and(builder.equal(root.<String>get(randomColumnName), valueToSearchFor));
//      });
    }
}

Answer 2

You can use nativeQuery=true like this..

@Query(value = "select c from Calendar c where c.:calendarDay=:value", nativeQuery = true)
List<Calendar> getPersonName(@Param("calendarDay") String calendarDay, @Param("value") String value);

Answer 3

The only dynamic parameter Spring JPA supports is #{#entityName}. Dynamic column names in @Query annotations are not supported., and that is what you are trying to accomplish.

Your only option is to construct a query manually using either QueryDSL, Specifications or Criteria API or simply by building a query string and passing it to your EntityManager. Regardless, you'll have to write code for that.

See, for instance:

• https://spring.io/blog/2011/04/26/advanced-spring-data-jpa-specifications-and-querydsl/
• How to add custom column name Spring Data JPA?