我有两个模型,Location
和LocationAttribute
,具有多对多关系。
我有一个LocationAttribute ID列表,并希望找到至少有一个的所有位置
那些属性。
Location.java:
@Entity
public class Location {
@Id
@GeneratedValue
@Column(name="LOCATION_ID")
protected int id;
@ManyToMany(targetEntity = LocationAttribute.class)
@JoinTable(name="LOCATION_TO_LOCATION_ATTRIBUTE",
joinColumns = @JoinColumn(name="LOCATION_ID", referencedColumnName = "LOCATION_ID"),
inverseJoinColumns = @JoinColumn(name="LOCATION_ATTRIBUTE_ID", referencedColumnName = "LOCATION_ATTRIBUTE_ID")
)
private List<LocationAttribute> locationAttributes;
}
LocationAttribute.java:
@Entity
public class LocationAttribute {
@Id
@GeneratedValue
@Column(name="LOCATION_ATTRIBUTE_ID")
protected int id;
}
我尝试了以下QueryDSL代码:
List<Integer> locationAttributeIds = new ArrayList<Integer>();
locationAttributeIds.add(1);
locationAttributeIds.add(2);
locationAttributeIds.add(3);
QLocation location = QLocation.location;
JPAQuery query = new JPAQuery(entityManager, JPQLTemplates.DEFAULT);
query.from(location) .where(location.locationAttributes.any().id.in(locationAttributeIds));
query.list(location);
如果locationAttributeIds具有0或1个元素,则代码可以正常工作。但是,当我有超过1个元素时,我收到此错误:
java.lang.IllegalArgumentException: org.hibernate.hql.internal.ast.QuerySyntaxException: unexpected token: , near line 5, column 53 [select location
from ch.locatee.test.querydslerror.locatee.Location location
where exists (select location_locationAttributes_cc6d8
from location.locationAttributes as location_locationAttributes_cc6d8
where location_locationAttributes_cc6d8.id in :x1_0_, :x1_1_, :x1_2_)]
at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1750)
at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1677)
at org.hibernate.jpa.internal.QueryImpl.getResultList(QueryImpl.java:458)
at com.mysema.query.jpa.impl.AbstractJPAQuery.getResultList(AbstractJPAQuery.java:194)
at com.mysema.query.jpa.impl.AbstractJPAQuery.list(AbstractJPAQuery.java:246)
at ch.locatee.test.querydslerror.locatee.AppTest.testSomething(AppTest.java:63)
我在问题中发现了不少相关网站,但我不确定如何解决问题。
我做了一个快速测试项目,你可以在Github上找到它:https://github.com/bekoeppel/QueryDslInErrorTest。 mvn test
会产生上述错误。
如果我能找到列表中至少有一个Locations
的所有LocationAttribute.id
,我们将不胜感激。谢谢!
答案 0 :(得分:1)
使用以下JPAQuery构造函数
new JPAQuery(entityManager);
JPQLTemplates
提供了通用序列化,但没有找到所有Hibernate的JPQL变体。只有EntityManager参数,Querydsl将为您选择正确的JPQLTemplates子类实例。