java - 通过多个映射为实体映射中的重复列

Question

我不明白为什么我仍然得到hibernate.MappingException：

Repeated column in mapping for entity: PanelCategoryOption column: category_id (should be mapped with insert="false" update="false")

PanelCategoryOption 映射

@Entity
@Table(name = "eq_panel_category_option")
public class PanelCategoryOption {

    @EmbeddedId
    private PanelCategoryOptionId id;    
}

PanelCategoryOptionId 映射

@Embeddable
public class PanelCategoryOptionId implements Serializable {

        @ManyToOne(fetch = FetchType.LAZY)
        @JoinColumns({
                @JoinColumn(name = "panel_id", referencedColumnName = "panel_id"),
                @JoinColumn(name = "category_id", referencedColumnName = "category_id")})
        private PanelCategory panelCategory;

        @ManyToOne(fetch = FetchType.LAZY)
        @JoinColumns({
                @JoinColumn(name = "category_option_id", referencedColumnName = "id", insertable = false, updatable = false),
                @JoinColumn(name = "category_id", referencedColumnName = "category_id", insertable = false, updatable = false)})
        private CategoryOption categoryOption;

}

架构

标签： javahibernatejpamany-to-oneembeddable

Answer 1

为什么您在 PanelCategoryOption 表中有 category_id 参考。这不是规范化的数据库设计，因为它不满足第二范式。尝试并更新您的数据库设计。

此外，如果您不想更改数据库设计，则需要进行以下更改，

  @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumns({
            @JoinColumn(name = "category_option_id", referencedColumnName = "id", insertable = false, updatable = false) })
    private CategoryOption categoryOption;

 @JoinColumns({
                @JoinColumn(name = "category_id", referencedColumnName = "category_id", insertable = false, updatable = false)})
 private Category category;