Question

这是我不得不注释的JPQL：

@Query(
 "SELECT a from Employee a WHERE eid = :eid and hireDate between :first and :last order by projectId"
)

因为我无法让它工作：

public List<Employee>
findByEidAndHireDateBetweenOrderByProjectId(
  String eid, Date first, Date last);

我的方法名是否正确遵循Spring Data查询方法名称的命名约定？

Answer 1

可以通过在其中附加OrderBy子句来应用静态排序查询方法引用属性 并提供排序方向 （Asc或Desc）。 Spring Data JPA - Reference Documentation

可能的问题：

“findByid ...”＆lt; - ID为小写
您提到要搜索“ eid ”，因此它应该是“findByEid ...”
您没有指定订单方向＆lt; - 这可能是主要问题;

存储库：

public interface EmployeeRepository extends
    PagingAndSortingRepository<Employee, Integer> {

    public List<Employee> findByEidAndHireDateBetweenOrderByProjectIdDesc(
        String eid, Date first, Date last);
}

员工实体：

@Entity
@Table(name = "employee")
public class Employee implements Serializable {
    private static final long serialVersionUID = 1L;

    @Id
    @SequenceGenerator(name = "employee_sequence", sequenceName = "employee_sequence",     allocationSize = 1)
    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "employee_sequence")
    @Column(name = "id", unique = true, nullable = false)
    private Integer id;

    @Column(name = "eid", nullable = false)
    private String eid;

    @Temporal(TemporalType.TIMESTAMP)
    @Column(name = "hire_date", nullable = false)
    private Date hireDate;

    @Column(name = "projectId", nullable = false)
    private Integer projectId;

    public Employee() {
    }

    // ...
    // Setters / Getters
    // ...

    // ...
    // eclipse generated hashCode / equals / toString
    // ...
}

此代码适用于我的机器：

数据库：PostgreSQL
ORM实现：hibernate 4.1.9
Spring：3.2.0.RELEASE
Spring-Data：1.2.0.RELEASE

如果要创建支持动态排序的查询方法 - Spring Data JPA - 1.3.2.3. Special parameter handling

Spring Data方法名称中的关键字优先级

1 个答案: