Java 检查ElementCollection映射是否具有匹配的条目

我有一个

@ElementCollection
@CollectionTable(
  name = "orgattributes", joinColumns = @JoinColumn(name = "org_id"))
@MapKeyColumn(name = "attribute")
@Column(name = "value")
Map<String,String> attributes

---

使用

列表

或

集合

执行此操作的标准方法是

成员

。我从未用

Map

尝试过。但是你可以试试

@Query（“从组织o中选择o，其中？o.attributes的1个成员”）

---

作为参数值，请尝试键或映射的值。键可能会起作用。

不过我需要它同时包含键和值。

@Query("from Organization o join o.attributes a where ?1 in entry(a)")
List<Organization> findOrganizationsWithAttribute(Map.Entry<String,String> attributeValue) ;

default List<Organization> findOrganizationsWithAttribute(String attribute, String value) {
    return findOrganizationsWithAttribute(Map.entry(attribute, value));
}

@Query("from Organization o join o.attributes a where ?1 in entry(a)")
List<Organization> findOrganizationsWithAttribute(Map<String,String> attributeValue) ;

default List<Organization> findOrganizationsWithAttribute(String attribute, String value) {
    return findOrganizationsWithAttribute(Map.of(attribute, value));
}

@Query("from Organization o join o.attributes a where key(a) = ?1 and value(a) = ?2")
List<Organization> findOrganizationsWithAttribute(Map<String, String> attributeValue);

select * from organization o where o.orgid in (select orgid from orgattribute a where a.attribute = ?1 and a.value = ?2)