How to search through array in Spring Boot CrudRepository

Question

Say, I have the following entity class:

Person.java

@Entity
public class Person {
  @Id
  private String name;

  private String[] c         


        

Answer 1

Ideally, You should declare cars as a separate Entity like this

@Entity
public class Person {
  @Id
  private String name;

  private List<Car> cars;

  // Constructor, getters and setters
}

If not you should change Array to List at the least. change

private String[] cars;

to

@ElementCollection
private List<String> cars;

Then You have to write a Query like this

@Query("select p from Person p WHERE :car in elements(p.cars)")
List<Person> getAllByCars...(@Param("car") String car)

Answer 2

I'm guessing at how you are currently storing the cars information and suggesting a possible solution:

@Entity
public class Car {
  @Id
  private String name;

  @Column
  private String person_name;
}

public interface CarRepository extends JpaRepository<Car, String> {
    //Result will have all cars with the person_name identifying the Person @Entity
    List<Car> findByName(String name);
}