Hibernate：“实体中重复的列映射”与“属性中不允许混合可更新和不可更新的列”

Question

我有遗产数据库。

+----+  +------------+ +------------+
|Site|  |Content     | |Program     |
+----+  +------------+ +------------+
|id  |  |id:PK       | |siteId:PK,FK|
|name|  |siteId:FK   | |code:PK     |
+----+  |prog_code:FK| |name        |
        |prog_param  | +------------+
        +------------+  

表内容有一个PK列。siteId列不是PK的一部分。表程序有两个PK列(siteId、code)。它是复合PK。此表用作模板。程序中唯一的变量是parameter，它位于表内容的prog_param列上。

+-----------+  +------------+  +-----------+  +---------------+
|Site       |  |Program     |  |ProgramId  |  |Content        |
+-----------+  +------------+  +-----------+  +---------------+
|id:long    |  |id:ProgramId|  |site:Site  |  |id:long        |
|name:String|  |name:String |  |code:String|  |site:Site      |
+-----------+  |param:String|  +-----------+  |program:Program|
               +------------+                 +---------------+

+-----------+  +------------+  +-----------+  +-------------------+
|Site       |  |Program     |  |ProgramId  |  |Content            |
+-----------+  +------------+  +-----------+  +-------------------+
|id:long    |  |id:ProgramId|  |site:Site  |  |id:long            |
|name:String|  |name:String |  |code:String|  |site:Site          |
+-----------+  +------------+  +-----------+  |program:Program    |
                                              |programParam:String|
                                              +-------------------+

作为代码

@Entity
@Table(name = "SITE")
@Getter @Setter
public class Site {
    @Id
    @Column(name = "SITE")
    protected String id;

    @Column(name = "NAME")
    protected String name;
}


@Entity
@Table(name = "PROGRAM")
@Getter @Setter
public class Program {
    @EmbeddedId
    protected ProgramId id;
    @Column(name = "NAME")
    protected String name;
}

@Embeddable
@Getter @Setter @EqualsAndHashCode
public class ProgramId implements Serializable{
    @ManyToOne
    @JoinColumn(name = "SITE")
    protected Site site;

    @Column(name = "code")
    protected String code;
}

@Entity
@Table(name="CONTENT")
@Getter
@Setter
public class Content {
    @Id
    @Column(name = "ID")
    protected Long id;

    @ManyToOne
    @JoinColumn(name = "SITEID",referencedColumnName="SITE")
    protected Site site;


    @OneToOne
    @JoinColumns({
        @JoinColumn(name="SITEID",referencedColumnName="SITE"),
        @JoinColumn(name="PROG_CODE",referencedColumnName="CODE"), 
    })
    protected Program program;
}

但这不是工作。Hibernate引发“实体映射中重复列”异常。

所以我研究了一些解决方案。最后，我发现这个'Republic column in mapping for Entity'异常抛出，当Hibernated无法确定使用哪个属性时。

因此，我尝试将“insertable=false,updatable=false”设置为内容的属性“program”

    @OneToOne
    @JoinColumns({
        @JoinColumn(name="SITEID",referencedColumnName="SITE", insertable=false, updatable=false),
        @JoinColumn(name="PROG_CODE",referencedColumnName="CODE"), 
    })
    protected Program program;

这也不是工作。“不允许在属性中混合可更新列和不可更新列”引发异常。

因此，我将set'insertable=false,updatable=false‘设置为'PROG_CODE'，当然，当我设置不同的PROG_CODE时，Hibernate不会更改PROG_CODE。

Answer 1

我也有同样的问题，两个复合键共享一个属性失败，“实体映射中的重复列”。我认为这可能是一个bug，参见:https://hibernate.atlassian.net/browse/hhh-4582。我使用的是Hibernate 3.6.4