Question

当我尝试在我的应用程序中创建一个新类别时，我收到以下错误，这是抱怨FK约束。然而，FK抱怨将类别描述映射到类别，因为两者都在同时创建，我不知道为什么会出现问题。

我可以毫无问题地更新类别和类别说明。

错误

ERROR - Cannot add or update a child row: a foreign key constraint fails (`crcart3`.`categorydescription`, CONSTRAINT `FKC6C4CBFE6FD28044` FOREIGN KEY (`category_description_id`) REFERENCES `categorydescription` (`category_id`))

类别表

@Table(name = "Category")
public class Category {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "category_id")
    private int categoryId;

    @JoinTable(
            name = "ImageMapping",
            joinColumns = @JoinColumn(name = "category_id"),
            inverseJoinColumns = @JoinColumn(name = "image_id")
    )
    @OneToOne(fetch = FetchType.EAGER, cascade = CascadeType.ALL)
    private Image categoryImageId;

    @JoinTable(
            name="CategoryDescription",
            joinColumns = @JoinColumn(name="category_id"),
            inverseJoinColumns = @JoinColumn(name="category_description_id")
    )
    @OneToOne(fetch = FetchType.EAGER, cascade = CascadeType.ALL)
    private CategoryDescription categoryDescription;

    @JoinTable(
            name = "CategoryMapping",
            joinColumns = @JoinColumn(name = "category_id"),
            inverseJoinColumns = @JoinColumn(name = "parent_category_id")
    )
    @ManyToOne(fetch = FetchType.EAGER, cascade = CascadeType.ALL)
    private Category parentCategory;

    @Column(name = "category_sort_order")
    private int sortOrder;

    @Column(name = "date_added")
    private Timestamp dateAdded;

    @Column(name = "last_modified")
    private Timestamp lastModified;

类别说明表

@Table(name="CategoryDescription")
public class CategoryDescription {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "category_description_id")
    private int categoryDescriptionId;

    @Column(name="category_id")
    private int categoryId;

    @OneToOne
    @JoinColumn(name="language_id")
    private Language languageId;

    @Column(name="category_name")
    private String categoryName;

    @Column(name="category_text")
    private String categoryText;

Answer 1

错误消息显示：

(`crcart3`.`categorydescription`, 
 CONSTRAINT `FKC6C4CBFE6FD28044` FOREIGN KEY (`category_description_id`) 
 REFERENCES `categorydescription` (`category_id`))

这意味着在表categorydescription中，列category_description_id是相同表category_id的列categorydescription的外键

这对我来说不合适。在这个表中有一个category_id列似乎是不对的。

由于FK，Hibernate JPA无法创建

1 个答案: