@Enumerated(EnumType.STRING)丢失，@AttributeOverride

Question

我需要在@Embeddable对象上使用@AttributeOverride，以防止同一复杂类型的两个属性的列名发生冲突。

但是，在执行此操作时，我还会丢失/覆盖@Embedded ExternalLink对象的networkId属性的@Enumerated注释。

最后，表的列link_network的类型是integer，而不是varyingchar(255)。

如何配置@AttributeOverride以保留@Enumerated配置？

以下是我的方案：

@Embeddable
public class Address {

    @Embedded
    @AttributeOverrides({
        @AttributeOverride(name="network", column=@Column(name="link_network")),
        @AttributeOverride(name="networkAddress", column=@Column(name="link_network_address")),
        @AttributeOverride(name="element", column=@Column(name="link_element"))
    })
    private ExternalLink link;

    @Embedded
    @AttributeOverrides({
        @AttributeOverride(name="network", column=@Column(name="before_network")),
        @AttributeOverride(name="networkAddress", column=@Column(name="before_network_address")),
        @AttributeOverride(name="element", column=@Column(name="before_element"))
    })
    private ExternalLink before;
}

@Embeddable
public class ExternalLink {

    @Enumerated(EnumType.STRING)
    private NetworkId network;
    private String networkAddress;
    private String element;
}

Answer 1

我所知道的唯一方法是转换，它将NetworkId映射到String (varchar)

@Converter(autoApply = true)
public class NetworkIdConverter implements AttributeConverter<NetworkId , String> {

    @Override
    public String convertToDatabaseColumn(NetworkId attribute) {
        if (attribute == null) {
            return null;
        }
        return attribute.name();
    }

    @Override
    public NetworkId convertToEntityAttribute(String dbData) {
        if (dbData == null) {
            return null;
        }
        return NetworkId.valueOf(dbData);
    }
}