Question

我做错了什么？ Exceprion说我需要制作＆＃34; id＆＃34;字段不可插入且不可更新。但我已经有了这些注释。我甚至删除了＆＃34; id＆＃34;的setter方法，但它没有效果。缺少什么？

weblogic.application.ModuleException: org.hibernate.MappingException: Repeated column in mapping for entity: com.shop.database.entities.Object column: OBJECT_ID (should be mapped with insert="false" update="false"):org.hibernate.MappingException:Repeated column in mapping for entity: com.shop.database.entities.Object column: OBJECT_ID (should be mapped with insert="false" update="false")
    at org.hibernate.mapping.PersistentClass.checkColumnDuplication(PersistentClass.java:696)
    at org.hibernate.mapping.PersistentClass.checkPropertyColumnDuplication(PersistentClass.java:718)
    at org.hibernate.mapping.PersistentClass.checkColumnDuplication(PersistentClass.java:740)
    at org.hibernate.mapping.PersistentClass.validate(PersistentClass.java:493)
    at org.hibernate.mapping.RootClass.validate(RootClass.java:270)
    Truncated. see log file for complete stacktrace

My Object.class：

@Entity
@Table(name = "LAB3_OBJECTS")
public class Object {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "OBJECT_ID", length = 10, insertable = false, updatable = false, nullable = false)
    private int id;
    @Column(name = "NAME")
    private String name;
    @ManyToOne
    @JoinColumn(name = "OBJECT_TYPE_ID", referencedColumnName = "OBJECT_TYPE_ID")
    private ObjectType objectType;
    @ManyToOne
    @JoinColumn(name = "OBJECT_ID")
    private Object parent;

public Object() {
}

public Object(String name, ObjectType objectType) {
    this.name = name;
    this.objectType = objectType;
}

public int getId() {
    return id;
}

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public ObjectType getObjectType() {
    return objectType;
}

public void setObjectType(ObjectType objectType) {
    this.objectType = objectType;
}

public Object getParent() {
    return parent;
}

public void setParent(Object parent) {
    this.parent = parent;
}

}

Answer 1

OBJECT_ID已用作id列，因此无法用于加入。使用新列

public class MyObject {
    ...
    @ManyToOne
    @JoinColumn(name = "PARENT_OBJECT_ID")
    private MyObject parent;

org.hibernate.MappingException似乎没有任何理由发生

1 个答案: