org.hibernate.QueryException：重复的@ManyToOne关联路径条件

我有两个类有它们之间的关系。这些都是org.hibernate.QueryException：重复的@ManyToOne关联路径条件

com.edfx.adb.persist.Activity：

package com.edfx.adb.persist.entity; 

import java.util.List; 

import javax.persistence.Column; 
import javax.persistence.FetchType; 
import javax.persistence.JoinColumn; 
import javax.persistence.Lob; 
import javax.persistence.ManyToOne; 
import javax.persistence.OneToMany; 
import javax.persistence.Table; 
import javax.persistence.Transient; 

import org.hibernate.annotations.Cascade; 
import org.hibernate.annotations.CascadeType; 
import org.hibernate.annotations.NaturalId; 

@javax.persistence.Entity 
@Table(name = "ACTIVITY") 
public class Activity extends Entity { 

    @Transient 
    private static final long serialVersionUID = 4741665931936809028L; 

    private String activityId; 
    private String activityName; 
    private String activityDescription; 
    private Customer customer; 
    private ActivityType activityType; 
    private boolean active; 
    private Double mandays; 
    private Double price; 
    private String manager; 
    private List<Participation> participations; 

    public Activity() { 
     super(); 
    } 

    @NaturalId 
    @Column(name = "ACTIVITY_ID", nullable = false) 
    public String getActivityId() { 
     return activityId; 
    } 

    public void setActivityId(String activityId) { 
     this.activityId = activityId; 
    } 

    @Lob 
    @Column(name = "ACTIVITY_NAME", nullable = false) 
    public String getActivityName() { 
     return activityName; 
    } 

    public void setActivityName(String activityName) { 
     this.activityName = activityName; 
    } 

    @Lob 
    @Column(name = "ACTIVITY_DESCRIPTION", nullable = false) 
    public String getActivityDescription() { 
     return activityDescription; 
    } 

    public void setActivityDescription(String activityDescription) { 
     this.activityDescription = activityDescription; 
    } 

    @ManyToOne 
    @JoinColumn(name = "CUSTOMER_ID", nullable = false) 
    public Customer getCustomer() { 
     return customer; 
    } 

    public void setCustomer(Customer customer) { 
     this.customer = customer; 
    } 

    @ManyToOne 
    @JoinColumn(name = "ACTIVITY_TYPE_ID", nullable = false) 
    public ActivityType getActivityType() { 
     return activityType; 
    } 

    public void setActivityType(ActivityType activityType) { 
     this.activityType = activityType; 
    } 

    @Column(name = "ACTIVE", nullable = false) 
    public boolean isActive() { 
     return active; 
    } 

    public void setActive(boolean active) { 
     this.active = active; 
    } 

    @Column(name = "MANDAYS") 
    public Double getMandays() { 
     return mandays; 
    } 

    public void setMandays(Double mandays) { 
     this.mandays = mandays; 
    } 

    @Column(name = "PRICE") 
    public Double getPrice() { 
     return price; 
    } 

    public void setPrice(Double price) { 
     this.price = price; 
    } 

    @Column(name = "CUSTOMER_SIDE_MANAGER") 
    public String getManager() { 
     return manager; 
    } 

    public void setManager(String manager) { 
     this.manager = manager; 
    } 

    @OneToMany(mappedBy = "activity", fetch = FetchType.LAZY) 
    @Cascade(CascadeType.SAVE_UPDATE) 
    public List<Participation> getParticipations() { 
     return participations; 
    } 

    public void setParticipations(List<Participation> participations) { 
     this.participations = participations; 
    } 
}

com.edfx.adb.persist.ActivityType：

package com.edfx.adb.persist.entity; 

import javax.persistence.Column; 
import javax.persistence.Table; 
import javax.persistence.Transient; 

@javax.persistence.Entity 
@Table(name = "ACTIVITY_TYPE") 
public class ActivityType extends Entity { 

    @Transient 
    private static final long serialVersionUID = 2322745769010162801L; 

    private String parent; 
    private String name; 
    private String activityId; 

    public ActivityType() { 

    } 

    @Column(name = "PARENT", nullable = false) 
    public String getParent() { 
     return parent; 
    } 

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

    @Column(name = "NAME", nullable = false) 
    public String getName() { 
     return name; 
    } 

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

    @Column(name = "ACTIVITY_ID", nullable = false) 
    public String getActivityId() { 
     return activityId; 
    } 

    public void setActivityId(String activityId) { 
     this.activityId = activityId; 
    } 
}

他们两个扩展com.edfx.adb.persist.entity.Entity：

package com.edfx.adb.persist.entity; 

import java.io.Serializable; 
import java.util.Date; 

import javax.persistence.Column; 
import javax.persistence.GeneratedValue; 
import javax.persistence.GenerationType; 
import javax.persistence.Id; 
import javax.persistence.MappedSuperclass; 
import javax.persistence.Temporal; 
import javax.persistence.TemporalType; 
import javax.persistence.Transient; 
import javax.persistence.Version; 

import org.hibernate.proxy.HibernateProxyHelper; 

@MappedSuperclass 
public class Entity implements Serializable { 

    @Transient 
    private static final long serialVersionUID = 7470288121057059283L; 

    private Long id; 
    private Date createTimestamp; 
    private Date lastUpdateTimestamp; 
    private Long version; 

    public Entity() { 
     super(); 
    } 

    @Id 
    @GeneratedValue(strategy = GenerationType.IDENTITY) 
    @Column(name = "ID", updatable = false, nullable = false, unique = true) 
    public Long getId() { 
     return id; 
    } 

    @SuppressWarnings("unused") 
    private void setId(Long id) { 
     this.id = id; 
    } 

    @Temporal(TemporalType.TIMESTAMP) 
    @Column(name = "CREATE_TIMESTAMP") 
    public Date getCreateTimestamp() { 
     return createTimestamp; 
    } 

    public void setCreateTimestamp(Date createTimestamp) { 
     this.createTimestamp = createTimestamp; 
    } 

    @Temporal(TemporalType.TIMESTAMP) 
    @Column(name = "LAST_UPDATE_TIMESTAMP") 
    public Date getLastUpdateTimestamp() { 
     return lastUpdateTimestamp; 
    } 

    public void setLastUpdateTimestamp(Date lastUpdateTimestamp) { 
     this.lastUpdateTimestamp = lastUpdateTimestamp; 
    } 

    @Version 
    @Column(name = "VERSION") 
    public Long getVersion() { 
     return version; 
    } 

    @SuppressWarnings("unused") 
    private void setVersion(Long version) { 
     this.version = version; 
    } 

    @Override 
    public int hashCode() { 
     final int prime = 31; 
     int result = 1; 
     return prime * result + ((getId() == null) ? super.hashCode() : getId().hashCode()); 
    } 

    @Override 
    public boolean equals(Object obj) { 
     if (this == obj) { 
      return true; 
     } 

     if (obj == null) { 
      return false; 
     } 

     if (!getClass().equals(HibernateProxyHelper.getClassWithoutInitializingProxy(obj))) { 
      return false; 
     } 

     final Entity other = (Entity) obj; 

     if (getId() != other.getId()) { 
      if (getId() == null) { 
       return false; 
      } 
      if (!getId().equals(other.getId())) { 
       return false; 
      } 
     } 

     return true; 
    } 
}

现在我使用Primefaces数据表显示，其中List<Activity>我在字段0上进行过滤的ActivityType。 ActivityType与Activity通过@ManyToOne关联。

用于过滤List<Activity>我使用：

Criteria criteria = getSessionFactory().getCurrentSession().createCriteria(Activity.class); 
criteria.createCriteria("activityType").add(Restrictions.like("name", value.toString(), MatchMode.START));

我越来越：

null: org.hibernate.QueryException: duplicate association path: activityType 
    at org.hibernate.loader.criteria.CriteriaQueryTranslator.createAssociationPathCriteriaMap(CriteriaQueryTranslator.java:172) [hibernate-core-4.1.8.Final.jar:4.1.8.Final] 
    at org.hibernate.loader.criteria.CriteriaQueryTranslator.<init>(CriteriaQueryTranslator.java:111) [hibernate-core-4.1.8.Final.jar:4.1.8.Final] 
    at org.hibernate.loader.criteria.CriteriaLoader.<init>(CriteriaLoader.java:84) [hibernate-core-4.1.8.Final.jar:4.1.8.Final] 
    at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1602) [hibernate-core-4.1.8.Final.jar:4.1.8.Final] 
    at org.hibernate.internal.CriteriaImpl.list(CriteriaImpl.java:374) [hibernate-core-4.1.8.Final.jar:4.1.8.Final] 
    at com.edfx.adb.dao.ActivityDao.loadActivities(ActivityDao.java:54) [classes:] 
    at com.edfx.adb.service.ActivityService.loadActivities(ActivityService.java:101) [classes:]

这个错误并不总是永不表示第一负载之后。过滤表5-6次后，我有这个错误。

我很担心，如果映射和标准是否正确。任何建议都会非常有帮助。

来源

2013-02-15 Tapas Bose

我认为你需要提供一个别名，所以你应该这样更改代码：

Criteria criteria = getSessionFactory().getCurrentSession().createCriteria(Activity.class); 

criteria.createCriteria("activityType", "at") 
    .add(
     Restrictions.like("at.name", value.toString(), MatchMode.START));

来源

2013-02-15 13:53:08

感谢。我得到错误'null：org.hibernate.QueryException：无法解析属性：activityType.name：com.edfx.adb.persist.entity.Activity'当我做了'criteria.add（Restrictions.like（“activityType.name “，value.toString（），MatchMode.ANYWHERE））;' – 2013-02-15 14:17:45

尝试为'activityType'创建一个别名，就像我在回答中编辑的那样 – 2013-02-15 14:32:16

org.hibernate.QueryException：重复的@ManyToOne关联路径条件

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