Hibernate @ManyToOne引用了一个未知的实体

问题描述

我收到以下Hibernate异常：

MatchO.awayTeam上的@OneToOne或@ManyToOne引用未知实体：Team $ b

简化的Matchup类看起来像这样：

  @Entity public class Matchup实现Serializable 
 {
 protected team awayTeam; 
 
 @ManyToOne 
 @JoinColumn（name =away_team_id）
 public Team getAwayTeam（）{
 return awayTeam; 
 
 
 
 
 $ b 
简化的Team类看起来像这样：
  @Entity 
 public class Team implements Serializable {
 protected List< Matchup>对决; 
 
 @OneToMany（mappedBy =awayTeam，targetEntity = Matchup.class，
 fetch = FetchType.EAGER，cascade = CascadeType.ALL）
 public List< Matchup> getMatchups（）{
返回匹配; 
 
 
 $ / code $ / pre 
 $ b $注意：
 
 
 
 
 Matchup和Team都有子类。我不确定这是否会影响这种情况。
 
 
包含
的Matchup和Team都列在我的persistence.xml中。
 
 
如果我在两个getter方法中都放置了@Transient注解，那么错误
就会消失。
 
 
 
 
 
任何人都可以阐明为什么这个异常正在发生？
解决方案
我想出了问题：我没有将类Team添加到Hibernate  AnnotationConfiguration 对象。因此，Hibernate没有认识到这个类。  
I am receiving the following Hibernate Exception:

@OneToOne or @ManyToOne on Matchup.awayTeam references an unknown entity: Team

The simplified Matchup class looks like this:
@Entity public class Matchup implements Serializable 
{
   protected Team awayTeam;

   @ManyToOne 
   @JoinColumn(name="away_team_id")
   public Team getAwayTeam() {
      return awayTeam;
   }
}
The simplified Team class looks like this:
@Entity
public class Team implements Serializable {
    protected List<Matchup> matchups;

    @OneToMany(mappedBy="awayTeam", targetEntity = Matchup.class,
    fetch=FetchType.EAGER, cascade=CascadeType.ALL)
    public List<Matchup> getMatchups() {
       return matchups;
    }
}
Notes:
Both Matchup and Team have subclasses. I'm not sure if this impacts the situation.
Both Matchup and Team are listed in my persistence.xml as beingincluded.
If I put @Transient annotations on both getter methods, the errordisappears.
Can anybody shed light on why this exception is occurring?
 解决方案 
I figured out the problem: I was not adding class Team to the Hibernate AnnotationConfiguration object. Thus, Hibernate was not recognizing the class. 
                        
这篇关于Hibernate @ManyToOne引用了一个未知的实体的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！