spring data - how to filter users of a particular userProfile by userProfileType? - spring-data

Question

My User entity follows:
#Entity
#Table
public class User {
private static final long serialVersionUID = 1L;
#Id
#GeneratedValue(generator = "uuid")
#GenericGenerator(name = "uuid", strategy = "uuid2")
#Column(name = "id", unique = true, insertable = true)
private String id;
// non relevant attributes
#ManyToMany(fetch = FetchType.EAGER)
#Fetch(FetchMode.SELECT)
#JoinTable(name = "user2userProfile",
joinColumns = #JoinColumn(name = "userId"),
inverseJoinColumns = #JoinColumn(name = "userProfileId"))
private Set<UserProfile> userProfileSet;
// getters and setters
}
The UserProfile entity follows:
#Entity
#Table(name = "userProfile")
public class UserProfile {
private static final long serialVersionUID = 1L;
#Id
#GeneratedValue(generator = "uuid")
#GenericGenerator(name = "uuid", strategy = "uuid2")
#Column(name = "id", unique = true, insertable = true)
private String id;
#Column(name = "type", length = 15, unique = true, nullable = false)
private String type = UserProfileType.USER.getUserProfileType();
// constructors, getter and setter
}
The UserProfileType enum is
public enum UserProfileType {
USER("USER"),
READER("READER"),
WRITER("WRITER"),
ADMIN("ADMIN");
// constructor and getter
}
My UserJpaRepository is:
public interface UserJpaRepository extends JpaRepository<User, String> {
// non relevant code
List<User> findAllByUserProfileType(UserProfileType userProfileType);
}
The way it stands now, I get the following error message on the console:
org.springframework.data.mapping.PropertyReferenceException: No property userProfileType found for type User!
What is the correct declaration on UserJpaRepository to get a list of users that have a specific UserProfileType (i.e. a list of all users that have a UserProfile of type READER)?

Answer 1

I don't really understand why you need to have a many to many relationship from your user to your user profile.
So if we would correct that to a many to one relationship like:
in User:
#OneToMany(mappedBy = "user")
private Set<UserProfile> profiles;
in UserProfile:
#ManyToOne
#JoinColumn(name = "user_id")
private User user;
you could just setup a search by String type in your UserProfileRepository:
List<UserProfile> findAllByType(String type);
If you now iterate the List you get, you can get all users with a certain UserProfileType:
List<User> users = userProfileRepository.findAllByType(UserProfileType.USER.toString()).stream().map(profile -> profile.getUser()).collect(Collectors.toList());