Spring Data JPA：创建一个抽象存储库 [英] Spring Data JPA : Creating an abstract repository

问题描述

给出以下类：

@MappedSuperclass
@Inheritance(strategy=InheritanceType.TABLE_PER_CLASS)
@DiscriminatorColumn(name="animalType",discriminatorType=DiscriminatorType.STRING)
@QueryExclude
public abstract class Animal  {}

@Entity
@DiscriminatorValue("dog")
public class Dog {}

@Entity
@DiscriminatorValue("cat")
public class Cat {}

是否有可能以某种方式为 Animal 配置JPA存储库？

Is it possible somehow to configure a JPA Repository for Animal?

我已经尝试了

public interface AnimalRepository extends JpaRepository<Animal,Long>

然而这失败了：

java.lang.IllegalArgumentException：不是托管类型：Animal

java.lang.IllegalArgumentException: Not an managed type: Animal

有没有办法配置？

我希望能够执行以下任务：

I'd like to be able to perform tasks like:

@Autowired
private AnimalRepository repository;

public void doSomething()
{
    Animal animal = repository.findById(123);
    animal.speak();
}

推荐答案

我有类似的错误。我通过添加我的实体类到我的persistence.xml文件的映射来解决它。

I had similiar error. I solved it by adding mapping of my entity class to my persistence.xml file.

所以可能会在你的persistence.xml中添加这样的东西：

So maybe add something like this to your persistence.xml:

<persistence-unit>
...   
<class>yourpackage.Animal</class>
...
</persistence-unit>

这篇关于Spring Data JPA：创建一个抽象存储库的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！