当策略为标识时，Hibernate RX插入、刷新和刷新返回异常

Question

当我尝试hibernate rx库并运行示例时

        // obtain a reactive session
        factory.withTransaction(
                // persist the Authors with their Books in a transaction
                (session, tx) -> session.persist(author1, author2)
                        .flatMap(Mutiny.Session::flush)
                        .flatMap(s -> s.refresh())
        )

和

class Author {
    @Id @GeneratedValue(strategy = GenerationType.IDENTITY)
    Integer id;

它将抛出CompletionException

Exception in thread "main" java.util.concurrent.CompletionException: org.hibernate.PropertyAccessException: Could not set field value [1] value by reflection : [class org.hibernate.example.reactive.Author.id] setter of org.hibernate.example.reactive.Author.id

我在https://github.com/semistone/hibernate-reactive/commit/398b1570666ed81a7d257020166f2ae59f1c5eb8中推送测试代码

有人能帮我检查一下吗？

谢谢

Answer 1

更新：This is a bug将在Hibernate Reactive 1.0 CR1中修复

答案在评论中，但我会在这里重复一遍。

您需要添加一个设置器，并将id类型更改为Long才能使其正常工作。Author类变为：

@Entity
@Table(name="authors")
class Author {
    @Id @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @NotNull @Size(max=100)
    private String name;

    @OneToMany(mappedBy = "author", cascade = PERSIST)
    private List<Book> books = new ArrayList<>();

    Author(String name) {
        this.name = name;
    }

    Author() {}

    void setId(Long id) {
        this.id = id;
    }

    Long getId() {
        return id;
    }

    String getName() {
        return name;
    }

    List<Book> getBooks() {
        return books;
    }
}

而且，您不需要添加刷新操作(.flatMap(Mutiny.Session::flush))，因为withTransaction已经为您完成了该操作。

而且你也不需要s.refresh。不知道你为什么需要它。