[英]How to select only certain fields with Quarkus Panache?
Quarkus
simplifies Hibernate ORM mappings with Panache
. Quarkus
使用Panache
简化了 Hibernate ORM 的映射。
Here is an example of my entity
and PanacheRepository
:这是我的entity
和PanacheRepository
的示例:
@Entity
public class Person {
@Id @GeneratedValue private Long id;
private String firstName;
private String lastName;
private LocalDate birth;
private Status status;
}
@ApplicationScoped
public class PersonRepository implements PanacheRepository<Person> {
// example
public Person findByName(String name){
return find("name", name).firstResult();
}
// ! and this is what I tried, but it's not possible to do it this way
// all the methods return Person or something of type Person like List<Person>
// so basically this won't even compile
public List<String> findAllLastNames() {
return this.find("select p.lastName from Person p").list();
}
}
All the guides explain how to write different queries, but is not clear how to select only certain attributes.所有指南都解释了如何编写不同的查询,但不清楚如何 select 只有某些属性。
If I don't need the whole Person
object, but rather the lastName
of all persons in my DB?如果我不需要整个Person
lastName
,而是我数据库中所有人的姓氏?
Is it possible to select only certain attributes with Quarkus Panache
?是否有可能 select 仅使用Quarkus Panache
的某些属性?
This is currently not possible, you can subscribe to this issue regarding projection for Hibernate with Panache: https://github.com/quarkusio/quarkus/issues/6261目前这是不可能的,您可以订阅这个关于 Hibernate 投影的问题: https://github.com/quarkusio/quarkus/issues/6261
Don't hesistate to vote for it (+1 reaction) and provides feedback.不要犹豫投票(+1 反应)并提供反馈。
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