hibernate - MapKey枚举为字符串

Question

@ElementCollection(fetch = FetchType.EAGER)
@CollectionTable(name = "entity_identifier")
@MapKeyEnumerated(EnumType.STRING)
@MapKey(name = "type")
@Column(name = "identifier")
val identifiers: MutableMap<IdentifierType, String> = mutableMapOf()

抛出这个

Caused by: org.hibernate.AnnotationException: Associated class not found: java.lang.String

表格很简单

create table entity(
    id serial primary key
);
create table entity_identifier(
    entity_id bigint references entity ( id ),
    identifier text,
    type text,
);

有什么办法可以让这个Map工作吗？

Answer 1

看起来我需要使用@MapKeyColumn，我不知道为什么

@ElementCollection( fetch = FetchType.EAGER)
@CollectionTable(name="entity_identifier")
@MapKeyColumn(name="type")
@MapKeyEnumerated(EnumType.STRING)
@Column(name = "identifier")
val identifiers: MutableMap<IdentifierType, String> = mutableMapOf()