Java Hibernate OneTONE异常映射错误?
我有以下课程Java Hibernate OneTONE异常映射错误?,java,hibernate,one-to-one,Java,Hibernate,One To One,我有以下课程 @Entity @Table(name = "seek") public class Seek implements Serializable { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) private int id; @NotNull @Valid @OneToOne(mappedBy="url") private Url url; } @En
@Entity
@Table(name = "seek")
public class Seek implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private int id;
@NotNull
@Valid
@OneToOne(mappedBy="url")
private Url url;
}
@Entity
@Table(name = "url")
public class Url implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private int id;
@OneToOne(cascade = CascadeType.ALL)
@JoinColumn(name = "idSeek", referencedColumnName = "id")
private Seek seek;
}
我的Url表具有idSeek列,我的Seek表与Url表没有任何关系列
我收到的例外情况是:
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'seekDao': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.hibernate.SessionFactory dao.hibernate.AbstractDao.sessionFactory; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in class path resource [configuration/HibernateConfig.class]: Invocation of init method failed; nested exception is org.hibernate.AnnotationException: Referenced property not a (One|Many)ToOne: model.Url.url in mappedBy of model.Seek.url
我的DAO刚刚扩展
public abstract class AbstractDao<PK extends Serializable, T> {
private final Class<T> persistentClass;
public AbstractDao() {
this.persistentClass = (Class<T>) ((ParameterizedType) this.getClass().getGenericSuperclass()).getActualTypeArguments()[1];
}
@Autowired
private SessionFactory sessionFactory;
protected Session getSession() {
return this.sessionFactory.getCurrentSession();
}
public T getByKey(PK key) {
return (T) this.getSession().get(this.persistentClass, key);
}
public T getByColumn(String column, String value) {
Criteria criteria = this.getSession().createCriteria(this.persistentClass);
return (T) criteria.add(Restrictions.eq(column, value)).uniqueResult();
}
public void persist(T entity) {
this.getSession().persist(entity);
}
public void delete(T entity) {
this.getSession().delete(entity);
}
protected Criteria createEntityCriteria() {
return this.getSession().createCriteria(this.persistentClass);
}
protected Query getQuery(String query) {
return this.getSession().createQuery(query);
}
所以我需要手动获取insert id并将其放在我的url obj上?
谢谢您的Seek类没有指向正确的
mappedBy
属性
@Entity
@Table(name = "seek")
public class Seek implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private int id;
@NotNull
@Valid
@OneToOne(mappedBy="seek")
private Url url;
}
Seek类未指向正确的
mappedBy
属性
@Entity
@Table(name = "seek")
public class Seek implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private int id;
@NotNull
@Valid
@OneToOne(mappedBy="seek")
private Url url;
}
尝试将
@OneToOne(mappedBy=“url”)
更改为@OneToOne(mappedBy=“seek”)
尝试将@OneToOne(mappedBy=“url”)
更改为@OneToOne(mappedBy=“seek”)我认为您需要在seek类中更改为@OneToOne(mappedBy=“seek”)
,以获取url属性。可能mappedBy=“seek”
?我在尝试保存模型时收到:WARN:SQL Error:1048,SQLState:23000 Error:Column'idSeek'不能为空。。。我的问题被修改了,在单词编辑后…我想您需要在seek类中更改为@OneToOne(mappedBy=“seek”)
以获取url属性。可能mappedBy=“seek”
?我在尝试保存模型时收到:WARN:SQL错误:1048,SQLState:23000错误:列“idSeek”不能为空。。。我的问题被修改了,在这个词被编辑后…你能再解释一下吗。您的更改可能会对问题产生什么影响?mappedBy属性仅对双向关系是必需的,可以在注释中忽略此元素…谢谢,我这样做了,但现在我还有其他疑问。。。您能帮忙吗?我在尝试保存模型时收到:WARN:SQL Error:1048,SQLState:23000 Error:Column'idSeek'不能为null。。。我的问题被修改了,在这个词被编辑后…你能再解释一下吗。您的更改可能会对问题产生什么影响?mappedBy属性仅对双向关系是必需的,可以在注释中忽略此元素…谢谢,我这样做了,但现在我还有其他疑问。。。您能帮忙吗?我在尝试保存模型时收到:WARN:SQL Error:1048,SQLState:23000 Error:Column'idSeek'不能为null。。。我的问题被修改了,在单词编辑后…谢谢,我这么做了,但现在我还有其他疑问。。。您能帮忙吗?我在尝试保存模型时收到:WARN:SQL Error:1048,SQLState:23000 Error:Column'idSeek'不能为null。。。我的问题在“编辑”一词之后被修改了……因为您使用的是双向关系,所以必须使用外部引用更新这两个实体。请看这里。谢谢,我这么做了,但现在我还有其他疑问。。。您能帮忙吗?我在尝试保存模型时收到:WARN:SQL Error:1048,SQLState:23000 Error:Column'idSeek'不能为null。。。我的问题在“编辑”一词之后被修改了……因为您使用的是双向关系,所以必须使用外部引用更新这两个实体。请看这里。
@Entity
@Table(name = "seek")
public class Seek implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private int id;
@NotNull
@Valid
@OneToOne(mappedBy="seek")
private Url url;
}