Item.java

package com.oliwier.listmebackend.domain.model;

import jakarta.persistence.*;
import lombok.Getter;
import lombok.NoArgsConstructor;
import lombok.Setter;

import java.math.BigDecimal;
import java.time.Instant;
import java.util.HashSet;
import java.util.Set;
import java.util.UUID;

@Entity
@Table(name = "items")
@Getter @Setter @NoArgsConstructor
public class Item {

    @Id
    private UUID id;

    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "list_id", nullable = false)
    private ShoppingList list;

    @Column(nullable = false, length = 500)
    private String name;

    @Column(nullable = false)
    private boolean checked;

    @Column(nullable = false)
    private int position;

    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "category_id")
    private Category category;

    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "created_by_device", nullable = false, updatable = false)
    private Device createdByDevice;

    @Column(name = "quantity", precision = 10, scale = 2)
    private BigDecimal quantity;

    @Column(name = "quantity_unit", length = 20)
    private String quantityUnit;

    @Column(name = "price", precision = 10, scale = 2)
    private BigDecimal price;

    @Column(name = "image_url", length = 500)
    private String imageUrl;

    @ManyToMany
    @JoinTable(
        name = "item_labels",
        joinColumns = @JoinColumn(name = "item_id"),
        inverseJoinColumns = @JoinColumn(name = "label_id")
    )
    private Set<Label> labels = new HashSet<>();

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

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

    @Column(name = "deleted_at")
    private Instant deletedAt;

    @PrePersist
    void prePersist() {
        if (id == null) id = UUID.randomUUID();
        Instant now = Instant.now();
        if (createdAt == null) createdAt = now;
        if (updatedAt == null) updatedAt = now;
    }

    @PreUpdate
    void preUpdate() {
        updatedAt = Instant.now();
    }
}