我对hql查询有一些问题:
@Query("Select s from Sport s JOIN s.categories as c where s.sportId = :sportId and c.categoryId = :categoryId")
Iterable<Sport> findByCategoryIdAndSportId(@Param("sportId")Long sportId, @Param("categoryId")Long categoryId);
此查询返回所有类别(似乎忽略了第二个and子句),但只返回与sportid匹配的运动。
以下是我代表运动和类别的课程:
@Entity
@Table(name = "Sports")
public class Sport implements Serializable
{
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Long sportId;
@OneToMany(mappedBy = "sportId")
@ApiModelProperty(required = true)
@JsonManagedReference
private Set<Category> categories;
@Column
private String sportName;
....get and set
和
@Entity
@Table(name = "Categories")
public class Category implements Serializable
{
@ManyToOne
@JoinColumn(name = "sportId", nullable = false)
@JsonBackReference
private Sport sportId;
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Long categoryId;
..get and set
编辑
假设:
Sport:
|sportId | SportName
|1 |Rugby
|2 |Basket
|3 |Tennis
和类别:
|categoryId | CategoryName | sportId|
|1 |Italy |1 |
|2 |England |2 |
|3 |USA |1 |
|1 |Spain |2 |
我想通过查询获得(假设sportid=1,categoryid=1):
| sportId | SportName | categoryId | CategoryName |
1 Rugby 1 Italy
有人能帮我吗?提前谢谢
1条答案
按热度按时间a1o7rhls1#
那不行。看看这个。
您可以反转查询以获取具有某些特定运动的类别: