Question

I faced the following problem: A CrudRepository returns a wrong result that is not matches database data. There is an entity class:

@Entity
@Table(name = "ATTRIBUTE")
public class Attribute implements Serializable {

  private static final long serialVersionUID = 7360594743377794716L;
  *******

  @Id
  @Basic(optional = false)
  @GeneratedValue(strategy = GenerationType.AUTO)
  @Column(name = "ID")
  private Long id;  
  *******
  @Column(name = "R_ORGANIZATION_ID")
  private Long refOrganizationId;  
  @Column(name = "TEXT_CODE")
  private String textCode;
  *******
  /**
  getters, settrs, hashCode, etc
  **/
}

And I have an appropriate CrudRepository

public interface AttributeRepository
    extends CrudRepository<Attribute, Long> {
  *****

  boolean existsByTextCodeAndRefOrganizationId(String textCode, Long organizationId);

  *****
}

The problem is that the repository returns true for a data that is not in the DB.

For instance I am passing 'asdf' as a textCode and 0 as an organizationId. And I'm geting true despite there is no such a textCode in the DB. Here is a autogenerated code of the query:

    select
        TOP(?) attribute0_.id as col_0_0_ 
    from
        attribute attribute0_ 
    where
        attribute0_.text_code=? 
        and attribute0_.r_organization_id=?
12:00:24.805 [http-nio-8080-exec-6] TRACE o.h.t.d.s.BasicBinder - binding parameter [2] as [VARCHAR] - [asdf]
12:00:24.805 [http-nio-8080-exec-6] TRACE o.h.t.d.s.BasicBinder - binding parameter [3] as [BIGINT] - [0]

But if I run a query in any SQL manager I will get 0 rows. What can it be?

Stuff: MS SQL Server 2012, Java 1.8, spring-boot.version 1.5.4.RELEASE

Answer 1

深度调试向我展示了问题出在适当服务中方法的调用顺序。最主要的是，existsBy返回的结果考虑了在existsBy调用时不在数据库中的accout创建的实体。因此，在出现问题之前的某些步骤中，Attribute实体已创建。这意味着Attribute已在当前事务中创建，但尚未持久化，但是existsBy已将其作为结果集的一部分。

谢谢大家！

CrudRepository existsBy returns a wrong result

1 个答案: