java - @Column 和 @Enumerated 在嵌入实体中不起作用

Question

我有主要实体:

@Entity
@Table(name = "partners")
public class Partner {
    @ElementCollection
    @CollectionTable(
            name = "external_login",
            joinColumns = @JoinColumn(name = "partner_id")
    )
    private List<ExternalLogin> externalLogins;
...
}

ExternalLogin是嵌入实体

@Embeddable
public class ExternalLogin {
    @Column(name = "type")
    @Enumerated(value = EnumType.STRING)
    private ExternalLoginType type;
    @Column(name = "login")
    private String login;
    @Column(name = "password_value")
    private String passwordValue;
}

public enum ExternalLoginType {
    ABC;
}

@Column 和 @Enumerated 不适用于 ExternalLogin 实体。

例如，查询中将是 external_login.passwordValue 而不是 external_login.password_value。

@Enumerated(value = EnumType.STRING) 也不起作用。 Hibernate 正在尝试获取字段的 int 值，而不是 string。

有人可以帮助我吗？

Answer 1

您滥用了注释@Embeddable。请参阅 oracle 文档 https://docs.oracle.com/javaee/6/api/javax/persistence/Embeddable.html 中的描述

Defines a class whose instances are stored as an intrinsic part of an owning entity and share the identity of the entity. Each of the persistent properties or fields of the embedded object is mapped to the database table for the entit

@Embeddable 注释仅对单数关联字段有意义。将列表字段注释为 @Embeddable 是错误的。

直接替换即可

@Embeddable
public class ExternalLogin {

至

@Entity
public class ExternalLogin {