Java Querydsl 在查询中设置获取模式
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时间：2020-08-14 00:23:20 来源:igfitidea点击:
Querydsl set fetch mode in a query
提问by Marko
I have a situation where a Card entity has a foreign key to a Person.
我有一个卡实体有一个人的外键的情况。
public class Card implements java.io.Serializable {
private String cardid;
private Person person;
@ManyToOne(fetch=FetchType.LAZY)
@JoinColumn(name="USERID")
public Person getPerson() {
return this.person;
}
}
The default fetch type for the person is LAZY. Can I specify the fetch type to EAGER within a query:
该人的默认提取类型是 LAZY。我可以在查询中指定 EAGER 的提取类型吗：
QCard qCard = QCard.card;
JPQLQuery query = getQuery().from(qCard);
query.list(qCard);
Thanks for any help.
谢谢你的帮助。
采纳答案by Timo Westk?mper
Did you try
你试过了吗
QCard qCard = QCard.card;
List<Card> cards = getQuery().from(qCard)
.innerJoin(qCard.person).fetch()
.list(qCard);
For QueryDSL 4.0.2+
对于 QueryDSL 4.0.2+
QCard qCard = QCard.card;
List<Card> cards = getQuery().from(qCard)
.innerJoin(qCard.person).fetchJoin()
.select(qCard).fetch();
