Spring JPA查询检查参数列表中是否至少存在一个列表元素

Question

@Query("select item from Item item where item.allowedGroups.id in ?1")
Page<Object> findByAllowedGroups(List<Long> userGroupIds, Pageable pageable);

org.hibernate.QueryException: illegal attempt to dereference collection [item0_.id.allowedGroups] with element property reference [id]

@Entity
@Table(name = "item")
@Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
public class Item extends AbstractAuditingEntity implements Serializable,Comparable<File> {

private static final long serialVersionUID = 1L;

@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;

@ManyToMany(fetch = FetchType.EAGER)
@Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
@JoinTable(name = "item_allowed_groups",
    joinColumns = @JoinColumn(name="item_id"),
    inverseJoinColumns = @JoinColumn(name="group_id"))
private Set<Group> allowedGroups = Sets.newHashSet();

// getters and setters

小组类：

@Entity
@Table(name = "group")
@Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
public class Group implements Serializable {

private static final long serialVersionUID = 1L;

@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;

@NotNull
@Size(max = 50)
@Column(name = "name", length = 50, nullable = false)
private String name;

// getters and setters

Answer 1

我通过设置Spring JPA QueryDSL并在这个堆栈溢出答案中实现解决方案来解决这个问题:https://stackoverflow.com/a/33455117/3285398。我将BooleanExpression修改为以下内容：

public static BooleanExpression hasItemAccess(List<Group> groups) {
    QItem item = QItem.item;
    return item.allowedGroups.any().in(groups);
}

并向ItemRepository添加了一个查询方法：

public interface ItemRepository extends JpaRepository<Item,Long>, QueryDslPredicateExecutor<Item> {

@Query("select item from Item item where item.user.login = ?#{principal.username}")
Page<Item> findByUserIsCurrentUser(Pageable pageable);

Page<Item> findAll(Predicate predicate, Pageable pageable);

}