JPQL（休眠實現）與連接問題選擇

我有2個實體：

package org.oscarehr.common.model; 

import java.util.List; 
import java.util.ArrayList; 
import java.util.Iterator; 

import javax.persistence.Column; 
import javax.persistence.Entity; 
import javax.persistence.Id; 
import javax.persistence.Table; 
import javax.persistence.OneToMany; 
import javax.persistence.PrePersist; 
import javax.persistence.JoinColumn; 
import javax.persistence.CascadeType; 
import javax.persistence.FetchType; 
import javax.persistence.GeneratedValue; 
import javax.persistence.GenerationType; 

@Entity 
@Table(name="spireAccessionNumberMap") 
public class SpireAccessionNumberMap extends AbstractModel<Integer> { 

    @Id 
    @GeneratedValue(strategy = GenerationType.IDENTITY) 
    private Integer id; 
    @Column(name="uaccn") 
    private Integer uaccn; 

    @OneToMany(cascade=CascadeType.ALL, fetch=FetchType.EAGER) 
    @JoinColumn(name="uaccn_id", referencedColumnName="id") 
    private List<SpireCommonAccessionNumber> commonAccessionNumbers = new ArrayList<SpireCommonAccessionNumber>(); 

    public SpireAccessionNumberMap() { 
    } 

    public SpireAccessionNumberMap(Integer uniqueAccn) { 
     this.uaccn = uniqueAccn; 
    } 


    //@Override 
    public Integer getId() { 
     return id; 
    } 

    public void setId(Integer id) { 
     this.id = id; 
    } 

    public Integer getUniqueAccessionNumber() { 
     return uaccn; 
    } 

    public void setUniqueAccessionNumber(Integer uaccn) { 
     this.uaccn = uaccn; 
    } 

    public List<SpireCommonAccessionNumber> getCommonAccessionNumbers() { 
     return commonAccessionNumbers; 
    } 

    @PrePersist 
    public void prePersist() { 
     Iterator<SpireCommonAccessionNumber> i = this.commonAccessionNumbers.iterator(); 
     SpireCommonAccessionNumber commonAccessionNumber; 
     while(i.hasNext()) { 
      commonAccessionNumber = i.next(); 
      commonAccessionNumber.setUniqueAccessionId(this.uaccn);   
     } 
    } 

}

和

package org.oscarehr.common.model; 

import javax.persistence.Column; 
import javax.persistence.Entity; 
import javax.persistence.Id; 
import javax.persistence.Table; 
import javax.persistence.JoinColumn; 
import javax.persistence.ManyToOne; 
import javax.persistence.GeneratedValue; 
import javax.persistence.GenerationType; 

@Entity 
@Table(name="spireCommonAccessionNumber") 
public class SpireCommonAccessionNumber extends AbstractModel<Integer> { 

    @Id 
    @GeneratedValue(strategy = GenerationType.IDENTITY) 
    private Integer id; 
    @Column(name="caccn") 
    private String caccn; 
    @ManyToOne 
    @JoinColumn(name="uaccn_id", referencedColumnName="id") 
    private Integer uaccn_id; 




    //@Override 
    public Integer getId() { 
     return id; 
    } 

    public void setId(Integer id) { 
     this.id = id; 
    } 

    public String getCommonAccessionNumber() { 
     return caccn; 
    } 

    public void setCommonAccessionNumber(String caccn) { 
     this.caccn = caccn; 
    } 


    public Integer getUniqueAccessionId() { 
     return uaccn_id; 
    } 

    public void setUniqueAccessionId(Integer uaccn_id) { 
     this.uaccn_id = uaccn_id; 
    } 
}

基本上，我有 '地圖' 對象，它具有與之相關聯的唯一號碼。地圖對象有一個'鏈接'到一個或多個'commonNumber'對象，它們存儲一個'公共'號碼。

這個想法是能夠使用JPQL和「Dao's」將許多常用數字映射到唯一的數字。

然而，當我部署我的Java WAR文件，我得到這個錯誤：

2013-01-04 13:42:12,344 INFO [Version:14] Hibernate Commons Annotations 3.1.0.GA 
2013-01-04 13:42:12,347 INFO [Version:16] Hibernate EntityManager 3.4.0.GA 
2013-01-04 13:42:17,753 ERROR [ContextLoader:215] Context initialization failed 
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [spring_jpa.xml]: Invocati 
on of init method failed; nested exception is org.hibernate.AnnotationException: @OneToOne or @ManyToOne on org.oscarehr.common.model.SpireCommonAccessionNumber.uaccn_ 
id references an unknown entity: java.lang.Integer 
     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1455) 
     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519) 
     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456) 
     at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294) 
     at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225) 
     at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291) 
     at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193) 
     at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:567) 
     at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913) 
     at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464) 
     at org.oscarehr.common.web.OscarSpringContextLoader.createWebApplicationContext(OscarSpringContextLoader.java:97) 
     at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:199) 
     at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:45) 
     at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4206) 
     at org.apache.catalina.core.StandardContext.start(StandardContext.java:4705) 
     at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:799) 
     at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:779) 
     at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:601) 
     at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:943) 
     at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:778) 
     at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:504) 
     at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1385) 
     at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:306) 
     at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142) 
     at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1389) 
     at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1653) 
     at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1662) 
     at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1642) 
     at java.lang.Thread.run(Thread.java:679) 
Caused by: org.hibernate.AnnotationException: @OneToOne or @ManyToOne on org.oscarehr.common.model.SpireCommonAccessionNumber.uaccn_id references an unknown entity: java.lang.Integer 
     at org.hibernate.cfg.ToOneFkSecondPass.doSecondPass(ToOneFkSecondPass.java:81) 
     at org.hibernate.cfg.AnnotationConfiguration.processEndOfQueue(AnnotationConfiguration.java:456) 
     at org.hibernate.cfg.AnnotationConfiguration.processFkSecondPassInOrder(AnnotationConfiguration.java:438) 
     at org.hibernate.cfg.AnnotationConfiguration.secondPassCompile(AnnotationConfiguration.java:309) 
     at org.hibernate.cfg.Configuration.buildMappings(Configuration.java:1148) 
     at org.hibernate.ejb.Ejb3Configuration.buildMappings(Ejb3Configuration.java:1226) 
     at org.hibernate.ejb.EventListenerConfigurator.configure(EventListenerConfigurator.java:173) 
     at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:854) 
     at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:425) 
     at org.hibernate.ejb.HibernatePersistence.createContainerEntityManagerFactory(HibernatePersistence.java:131) 
     at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:257) 
     at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:310) 
     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1514) 
     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1452) 
     ... 28 more

我在這裏有點不知所措......我已經嘗試用不同的方法來映射擺弄左右'地圖'對象的'普通'對象，但我不斷收到錯誤。

任何人都可以爲我闡明這一點嗎？

來源

2013-01-04 Jarrett

@ManyToOne的映射看起來應該是。

@ManyToOne() 
@JoinColumn(name="uaccn_id") 
private SpireAccessionNumberMap spireAccessionNumberMap; 


public SpireAccessionNumberMap getSpireAccessionNumberMap() { 
    return spireAccessionNumberMap; 
} 

public void setSpireAccessionNumberMap(
     SpireAccessionNumberMap spireAccessionNumberMap) { 
    this.spireAccessionNumberMap = spireAccessionNumberMap; 
}

OneToMany方面需要以下映射。

@OneToMany(cascade=CascadeType.ALL, fetch=FetchType.EAGER,mappedBy="spireAccessionNumberMap") 
private List<SpireCommonAccessionNumber> commonAccessionNumbers = new ArrayList<SpireCommonAccessionNumber>();

來源

2013-01-04 19:11:34

嗯...感謝@Manuel，現在部署:)但我發現了一個異常時，我嘗試保存：從服務器空，消息：'的SQLException「列uaccn_id「不能爲空」 '我很困惑tho，因爲我認爲jpql會'處理'爲我設置uaccn_id ... – Jarrett

嗯......我在mysql表上有一個'NOT NULL'條件，一旦我刪除了，我沒事......不知道爲什麼。我可能會給你的解決方案一個鏡頭，也許它會與「非空」條件。謝謝@曼努埃爾 – Jarrett

JPQL（休眠實現）與連接問題選擇

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