AutoIncrement Id PostgreSQL i Spring Boot Data JPA

Question

Mam problemy podczas próby utworzenia nowego rekordu w mojej bazie danych PostgreSQL. Chcę tylko pocztą na usługi REST nowego użytkownika (int id, string: email, String: hasło), ale mam ten błąd:

"exception": "org.springframework.dao.DataIntegrityViolationException", 
"message": "could not execute statement; SQL [n/a]; constraint [id]; nested exception is org.hibernate.exception.ConstraintViolationException: could not execute statement 

Są to moje klasy Java:

Domain

@Entity 
@Table(name = "users") 
public class User { 
    @Id 
    @GeneratedValue(strategy = GenerationType.IDENTITY) 
    private Integer id; 
    private String email; 
    private String password; 

    public User() {} 

    public Integer getId() { 
    return id; 
    } 

    public void setId(Integer id) { 
    this.id = id; 
    } 

    public String getEmail() { 
    return email; 
    } 

    public void setEmail(String email) { 
    this.email = email; 
    } 

    public String getPassword() { 
    return password; 
    } 

    public void setPassword(String password) { 
    this.password = password; 
    } 
} 

Controller

@RestController 
@RequestMapping("/users") 
public class UserController { 
    @Autowired 
    private UserService userService; 

    @RequestMapping(method = RequestMethod.GET) 
    public List<User> findAll() { 
    return userService.findAll(); 
    } 

    @RequestMapping(method = RequestMethod.POST) 
    public User addUser(@RequestBody User user) { 
    userService.addUser(user); 
    return user; 
    } 
} 

usługi

@Service 
public class UserService { 
    @Autowired 
    private UserRepository userRepository; 

    public List<User> findAll() { 
    return (List<User>) userRepository.findAll(); 
    } 

    public User addUser(User user) { 
    userRepository.save(user); 
    return user; 
    } 
} 

Repository

public interface UserRepository extends CrudRepository<User, Integer> { 
    // TODO 
} 

SQL

CREATE TABLE users(
    id INT PRIMARY KEY NOT NULL, 
    email TEXT NOT NULL, 
    password CHAR(20) NOT NULL 
); 

proszę, ktoś może mi pomóc, bo nie wiem, jak rozwiązać ten problem.

Answer 1

znalazłem rozwiązanie. Muszę zmienić scenariusz dla tych One:

CREATE TABLE users(
    id SERIAL PRIMARY KEY NOT NULL, 
    email TEXT NOT NULL, 
    password TEXT NOT NULL 
); 

Następnie jednostka powinna być opatrzone tym:

@Entity 
@Table(name = "users") 
public class User { 
    @Id 
    @GeneratedValue(strategy = GenerationType.IDENTITY) 
    @Column(columnDefinition = "serial") 
    private Long id; 
    private String email; 
    private String password; 

    public User() {} 

    public Long getId() { 
    return id; 
    } 

    public void setId(Long id) { 
    this.id = id; 
    } 

    public String getEmail() { 
    return email; 
    } 

    public void setEmail(String email) { 
    this.email = email; 
    } 

    public String getPassword() { 
    return password; 
    } 

    public void setPassword(String password) { 
    this.password = password; 
    } 
} 

Answer 2

SQL powinny być tak ..

CREATE TABLE users(
    id INT PRIMARY KEY BIGINT NOT NULL AUTO_INCREMENT, 
    email TEXT NOT NULL, 
    password CHAR(20) NOT NULL 
);