Create Ticket Validation Entity

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In this lesson, we'll create the ticket validation entity that records the validation of a ticket when attendees enter an event.

This entity tracks important details like the validation method used (QR code scan or manual) and the validation status, forming a key part of our ticket management system.

Creating the Ticket Validation Entity

The TicketValidation entity represents a single validation attempt of a ticket:

@Entity
@Table(name = "ticket_validations")
@Getter
@Setter
@AllArgsConstructor
@NoArgsConstructor
@Builder
public class TicketValidation {

    @Id
    @Column(name = "id", nullable = false, updatable = false)
    @GeneratedValue(strategy = GenerationType.UUID)
    private UUID id;

    @Column(name = "status", nullable = false)
    @Enumerated(EnumType.STRING)
    private TicketValidationStatusEnum status;

    @Column(name = "validation_method", nullable = false)
    @Enumerated(EnumType.STRING)
    private TicketValidationMethod validationMethod;

    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "ticket_id")
    private Ticket ticket;

    @CreatedDate
    @Column(name = "created_at", updatable = false, nullable = false)
    private LocalDateTime createdAt;

    @LastModifiedDate
    @Column(name = "updated_at", nullable = false)
    private LocalDateTime updatedAt;
}

Establishing the Relationship with Ticket

We need to update the Ticket class to maintain the relationship with its validations:

@Entity
@Table(name = "tickets")
@Getter
@Setter
@NoArgsConstructor
@AllArgsConstructor
@Builder
public class Ticket {

    @Id
    @Column(name = "id", nullable = false, updatable = false)
    @GeneratedValue(strategy = GenerationType.UUID)
    private UUID id;

    @Column(name = "status", nullable = false)
    @Enumerated(EnumType.STRING)
    private TicketStatusEnum status;

    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "ticket_type_id")
    private TicketType ticketType;

    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "purchaser_id")
    private User purchaser;

    @OneToMany(mappedBy = "ticket", cascade = CascadeType.ALL)
    private List<TicketValidation> validations = new ArrayList<>();

    // TODO: QrCode

    @CreatedDate
    @Column(name = "created_at", updatable = false, nullable = false)
    private LocalDateTime createdAt;

    @LastModifiedDate
    @Column(name = "updated_at", nullable = false)
    private LocalDateTime updatedAt;

}

Summary

Created TicketValidation class to model a ticket being validated at the event
Added validations reference to the Ticket class