OneToOne自定义连接查询

Question

我想对OneToOne关系进行自定义连接查询。我需要添加一个更多的子句，因为没有它我得到More than one row with the given identifier was found: com.example.Container_$$_javassist_0@17156065, for class: com.example.AnyContainer是否有可能这样做？

Container.java

@Entity 
@Table(name = "container") 
@Inheritance(strategy = InheritanceType.JOINED) 
public abstract class Container implements Serializable { 

    private String oid; 
    private Long id; 

    @Id 
    @GeneratedValue(generator = "ContainerIdGenerator") 
    @GenericGenerator(name = "ContainerIdGenerator", strategy = "com.example.ContainerIdGenerator") 
    @Column(name = "id") 
    public Long getId() { 
     return id; 
    } 

    @Id 
    @GeneratedValue(generator = "OidGenerator") 
    @GenericGenerator(name = "OidGenerator", strategy = "com.example.OidGenerator") 
    @Column(unique = true, nullable = false, updatable = false, length = 36) 
    public String getOid() { 
     return oid; 
    } 
    ..other getters/setters 
} 

O.java：Hibernate会使用select c.ownerType, c.owner_oid, c.owner_id from any c where c.owner_oid=? and c.owner_id=?的查询，但在这里我想用这样的from AnyContainer as c where c.owner = ? and c.ownerType = 0用于为连接查询。和？应该像往常一样拥有所有者。我说有一个条件 - >ownerType = 0

@Entity 
@Table(name = "object") 
@ForeignKey(name = "fk_container") 
public abstract class O extends Container { 

    private AnyContainer extension; 

    @OneToOne(optional = true, mappedBy = "owner") 
    @ForeignKey(name = "none") 
    @Cascade({org.hibernate.annotations.CascadeType.ALL}) 
    public AnyContainer getExtension() { 
     return extension; 
    } 
    ...other getters/setters 
} 

ResourceObjectShadow.java：Hibernate会使用select c.ownerType, c.owner_oid, c.owner_id from any c where c.owner_oid=? and c.owner_id=?的查询，但在这里我想用这样的from AnyContainer as c where c.owner = ? and c.ownerType = 1用于为连接查询。和？应该像往常一样拥有所有者。我说有一个条件 - >ownerType = 1

@Entity 
@Table(name = "resource_shadow") 
@ForeignKey(name = "fk_resource_object_shadow") 
public class ResourceObjectShadow extends O { 

    private AnyContainer attributes; 

    @OneToOne(optional = true, mappedBy = "owner") 
    @Cascade({org.hibernate.annotations.CascadeType.ALL}) 
    public AnyContainer getAttributes() { 
     return attributes; 
    } 
    ...other getters/setters 
} 

@Entity 
@Table(name = "any") 
public class AnyContainer implements Serializable { 

    private RContainerType ownerType; 
    private Container owner; 

    @ForeignKey(name = "fk_reference_owner") 
    @MapsId("owner") 
    @OneToOne(fetch = FetchType.LAZY) 
    @PrimaryKeyJoinColumns({ 
      @PrimaryKeyJoinColumn(name = "owner_oid", referencedColumnName = "ownerOid"), 
      @PrimaryKeyJoinColumn(name = "owner_id", referencedColumnName = "id") 
    }) 
    public Container getOwner() { 
     return owner; 
    } 
    ..other getters/setters 
} 

RContainerType.java

public enum RContainerType { 
    O, RESOURCE_OBJECT_SHADOW 
} 

编辑：更新ManyToOne - >到OneToOne在AnyContainer 我试图用户@Loader带注释的O类命名查询和ResourceObjectShadow，但没有使用。此外，我只尝试在AnyContainer课程上使用它，但完全没有使用它。

如何处理O和ResourceObjectShadow中OneToOne关系的自定义加入？有没有办法做到这一点编程（例如通过自定义tuplizer或类似的东西）？

Answer 1

当你想联接基础上多列，你可以在HQL

from AnyBean as a join a.b with b.type = 0 

使用with运营商现在，如果你想创建这样的映射，您可以使用formula标签。

<one-to-one name="one2oneSubRef" 
class="com.manu.hibernate.mappings.domain.RefOnlyAMain" property-ref="parentARef" 
      cascade="all" > 

<formula>'A'</formula> 

<formula>a_id</formula> 

</one-to-one> 

此映射将始终基于两列连接到表。

阅读示例here或API文档here。