继承类型联接JPA-Spring JPA中的属性查询

Question

我很难启动服务器，因为它抱怨在查询中找不到继承的属性。

BaseContent
==============
id
createUser

Category
===============
id
otherProperties

@Inheritance(strategy = InheritanceType.JOINED)
@Table(name = "base_content")
public class BaseContent  {
...
}

@Entity
@Table(name="categories")
@Inheritance(strategy = InheritanceType.JOINED)
@PrimaryKeyJoinColumn(name = "base_content_id", referencedColumnName = "id")
public class Category extends BaseContent{
}

@Query("select c from Category c " +
            "left join fetch c.createUser " +
            "left join fetch c.lastUpdateUser " +
            "left join fetch c.galleries g " +
            "left join fetch g.media " +
            "left join fetch c.parentRelationship pr " +
            "left join fetch c.productCategoryRelationships pcr " +
            "left join fetch pcr.child " +
            "left join fetch c.appliedLayouts l " +
            "left join fetch pr.parent " +
            "where c.id = ?1")
    public Category findById(Long categoryId);

我的问题是，既然我试图将它移动到继承模型（联接），我如何在带注释的查询中引用继承的属性？

（注意，该属性是私有可见性，在BaseContent中使用public getter/setter）

谢谢。

Answer 1

啊，哎呀，我忘了超类上的@entity注释...

现在管用了。