Hibernate Criteria，Joins，Or

Question

我正在尝试使用连接表，使用Restrictions.or和Restrictions.ilike来完成即席查询

我的实体看起来像：

@Entity
@Table(name="CASE_REVIEW")
public class CaseReview {

    @Id
    @Column(name = "REVIEW_ID", unique = true, nullable = false, length = 19)
    private Long reviewId;

    @ManyToOne(fetch = FetchType.EAGER)
    @JoinColumn(name = "CASE_ID", nullable = false)
    private Case reviewCase;

 }

 @Entity
 @Table(name = "CASE")
 public class Case {

    @Id
    @Column(name = "ID", unique = true, nullable = false, length = 19)
    private Long id;

    @OneToOne( fetch=FetchType.EAGER )
    @JoinColumn( name="STUDENT_ID" , referencedColumnName="ID", 
    private StudentInformation studentInformation;

 }

 @Entity
 @Table( name="STUDENT")
 public class StudentInformation {
    @Id
    @Column( name="ID")
    private Long id;

    @Column( name="LAST_NAME")
    private String lastName;

    @Column( name="FIRST_NAME")
    private String firstName;
 }

我的代码执行如下操作：

Criteria c = session.createCriteria( CaseReview.class );
c.createAlias( "reviewCase" , "reviewCase"); 
c.createAlias( "reviewCase.studentInformation" , "reviewCasestudentInformation");
c.add( Restrictions.or( Restrictions.ilike("reviewCasestudentInformation.lastName" , "%e%" ), Restrictions.ilike( "reviewCasestudentInformation.firstName" , "%e" )));

我收到org.hibernate.QueryException：无法解析属性：reviewCasestudentInformation：CaseReview。我也尝试过创建多层别名：

c.createAlias( "reviewCase.studentInformation" , "reviewCaseStudentInformation");

并在restriction.or中使用它，结果相同。奇怪的是，任何一组别名都适用于

Order.asc( "reviewCaseStudentInformation.lastName")

几乎不知所措。建议？

Answer 1

您需要创建另一个标准 - 即子标准 - 如下所示：

Criteria criteraCaseReview = session.createCriteria(CaseReview.class);
Criteria criteraReviewCase = criteraCaseReview.createCriteria("reviewCase");
criteraReviewCase.add(Restrictions.or(Restrictions.ilike("lastName", "%e%"), Restrictions.ilike( "firstName", "%e")));

PS。我认为ReviewCase是CaseReview上的一个字段并没有帮助...它会使代码相当混乱！