Btukfyl

I am a new member of the Spring Framework.
I have a problem, have anyone can help me?

I do not understand why after all the exceptions, all the records in all the tables are deleted.

Implement JPA repository. Have not any code delete.

@Repository

public interface UserRepository extends JpaRepository<User, Integer> {

    User findByEmail(String email);

    User findByUsername(String username);

}

Defined user entity. this class implements UserDetails.

@Entity

@Table(name = "user")

@Access(AccessType.FIELD)

public class User implements UserDetails, Serializable {

    private static final long serialVersionUID = 3921735010416402747L;



    @Basic

    @Column(name = "username", nullable = false, length = 60)

    private String username;



    @Basic

    @Column(name = "password", nullable = false, length = 60)

    private String password;



    @ManyToMany()

    @JoinTable(name = "user_role", joinColumns = @JoinColumn(name = "user_id"), inverseJoinColumns = @JoinColumn(name = "role_id"))

    @JsonIgnore

    private Set<Role> roles;



    }

LoginController performs the login.

RestController

@RequestMapping("/login/")

public class LoginController extends BaseController {



    private static final String jwtTokenCoookieName = "JWT-TOKEN";

    private static final String signingkey = "tokenkekeke";

    private static final Map<String, String> credentials = new HashMap<>();



    @Autowired

    private LoginService loginService;



    @RequestMapping(value = "login")

    @PostMapping()

    ResponseEntity<String> login(@RequestBody LoginData loginData, HttpServletRequest request, HttpServletResponse response) {

        System.out.print("start login...");

        loginService.login(loginData);



        CsrfToken csrfToken = (CsrfToken) request.getAttribute(CsrfToken.class.getName());

        if (csrfToken != null) {



            Cookie cookie = WebUtils.getCookie(request, "XSRF-TOKEN");

            String token = csrfToken.getToken();

            Authentication authentication = SecurityContextHolder.getContext().getAuthentication();

            if (cookie != null || token != null && token.equals(cookie.getValue())

                    && (authentication != null && authentication.isAuthenticated())) {



                cookie = new Cookie("XSRF-TOKEN", token);

                cookie.setPath("/");

                response.addCookie(cookie);

            }

        }



        return new ResponseEntity<>("Login Successful", null, HttpStatus.OK);

    }

}