提供了错误类型休眠的 ID [英] Provided id of the wrong type hibernate

问题描述

我收到错误:

org.hibernate.TypeMismatchException:为类 BEntity 提供了错误类型的 id.预期:BEntity 类，获得 AEntity 类

org.hibernate.TypeMismatchException: Provided id of the wrong type for class BEntity. Expected: class BEntity, got class AEntity

public class BEntity implements Serializable{
    @Id
    @Column(name = "NUM")
    private String num;

    @Id
    @Column(name = "INIT")
    private String init;

    @Column(name = "V_CNT")
    private Integer vcnt;

   //{{{some column omitted}}}//
}

public class AEntity implements Serializable{

    @Id
    @Column(name = "NUM")
    private String num;

    @Id
    @Column(name = "INIT")
    private String init;

    @OneToOne
    @PrimaryKeyJoinColumns({
        @PrimaryKeyJoinColumn(name="NUM", referencedColumnName="NUM"),
        @PrimaryKeyJoinColumn(name="INIT", referencedColumnName="INIT")
    })
    private BEntity bEntity;
}

HQL 查询:

String queryString = "FROM AEntity AS A " +
                     "LEFT JOIN A.bEntityAS B " +
                     "WHERE A.INIT||A.NUM IN (:carList) AND A.INIT IN (:initList) AND A.NUM IN (:numberList) " + 
                     "AND B.TRUK_AXL_CNT > 0";

休眠生成代码

select aentity0_.NUMBER as NUMBER4_0_, aentity0_.INITIAL as INITIAL4_0_, bentity_p1_.NUMBER as NUMBER5_1_, bentity_p1_.INITIAL as INITIAL5_1_, aentity0_.V_CNT as VCNT3_4_0_, aentity0_.EIN as EIN4_0_, aentity0_.TYP as TYP5_4_0_, aentity0_.TRUK_CNT as TRUK6_4_0_, bentity_p1_.TRUK_AXL_CNT as TRUK3_5_1_ from USR.aentity aentity0_ left outer join USR.bentity_PRIMARY bentity_p1_ on aentity0_.NUMBER=bentity_p1_.NUMBER and aentity0_.INITIAL=bentity_p1_.INITIAL 
where (aentity0_.INITIAL||aentity0_.NUMBER in (?,?,?)) 
and (aentity0_.INITIAL in (?,?,?)) 
and (aentity0_.NUMBER in (?, ?, ?))
and bentity_p1_.TRUK_AXL_CNT>0

当我在 SQL Explorer 中运行代码时，它只能在代码中运行导致问题...

When I run the code in SQL Explorer it works only running it in code cause the issue...

推荐答案

看起来这是 hibernate version 3.2.6 中的一个缺陷，仍然没有解决.遇到了这个 JIRA.

Looks like this is a defect in hibernate version 3.2.6 which is still not resolved. Came across this JIRA.

Hibernate 支持多个 @Id 但似乎在一对一映射下失败，建议的解决方法是使用单个 CompositeKey，这意味着您创建一个 PK 类

Having multiple @Id is supported by Hibernate but seems it fails under one to one mapping, suggested way of resolving this is to use single CompositeKey, which means you create a PK class

import java.io.Serializable;

import javax.persistence.Column;
import javax.persistence.Embeddable;

@Embeddable
public class PKClass implements Serializable {

    @Column(name = "NUM")
    private String num;

    @Column(name = "INIT")
    private String init;

    //gettter setter here

}

然后在您的实体中使用它作为 ID

then in your Entity use this as the ID

public class BEntity implements Serializable{

    @Id
    private PKClass pkClass = null;

    @Column(name = "V_CNT")
    private Integer vcnt;

   //{{{some column omitted}}}//
}

public class AEntity implements Serializable{

    @Id
    private PKClass pkClass = null;

    @OneToOne
    @PrimaryKeyJoinColumns({
        @PrimaryKeyJoinColumn(name="NUM", referencedColumnName="NUM"),
        @PrimaryKeyJoinColumn(name="INIT", referencedColumnName="INIT")
    })
    private BEntity bEntity;
}

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