JPA 엔티티 설계

import jakarta.persistence.*;
import lombok.*;
import java.time.LocalDateTime;

@Entity
@Table(name = "users")
@Getter @Setter
@NoArgsConstructor
@AllArgsConstructor
public class User {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @Column(nullable = false, length = 50)
    private String name;

    @Column(unique = true, nullable = false)
    private String email;

    @Column(name = "created_at")
    private LocalDateTime createdAt = LocalDateTime.now();

    @OneToMany(mappedBy = "user", cascade = CascadeType.ALL)
    private List<Order> orders = new ArrayList<>();
}

@Entity
@Table(name = "orders")
@Getter @Setter @NoArgsConstructor
public class Order {
    @Id @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "user_id")
    private User user;

    private int totalAmount;
    private LocalDateTime orderedAt = LocalDateTime.now();
}