java.sql.SQLException：无法添加或更新子行：外键约束失败

有人可以帮助我理解为什么当我试图持续存在以下错误ServiceProvider实体？java.sql.SQLException：无法添加或更新子行：外键约束失败

java.sql.SQLException: Cannot add or update a child row: a foreign key constraint fails (`springmvc/businesslocation`, CONSTRAINT `FK5CB747B5A26ED80E` FOREIGN KEY (`state_id`) REFERENCES `state` (`id`)) 
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2975) 
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1600) 
at com.mysql.jdbc.ServerPreparedStatement.serverExecute(ServerPreparedStatement.java:1129) 
at com.mysql.jdbc.ServerPreparedStatement.executeInternal(ServerPreparedStatement.java:681) 
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1368) 
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1283) 
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1268) 
at org.apache.commons.dbcp.DelegatingPreparedStatement.executeUpdate(DelegatingPreparedStatement.java:102) 
at org.hibernate.id.IdentityGenerator$GetGeneratedKeysDelegate.executeAndExtract(IdentityGenerator.java:72) 
at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:33) 
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2163) 
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2643) 
at org.hibernate.action.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:48) 
at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:279) 
at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:298) 
at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:181) 
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:107) 
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:187) 
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:172) 
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.performSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:94) 
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:70) 
at org.hibernate.impl.SessionImpl.fireSaveOrUpdate(SessionImpl.java:511) 
at org.hibernate.impl.SessionImpl.saveOrUpdate(SessionImpl.java:503) 
at org.hibernate.engine.CascadingAction$5.cascade(CascadingAction.java:218) 
at org.hibernate.engine.Cascade.cascadeToOne(Cascade.java:268) 
at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:216) 
at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:169) 
at org.hibernate.engine.Cascade.cascadeCollectionElements(Cascade.java:296) 
at org.hibernate.engine.Cascade.cascadeCollection(Cascade.java:242) 
at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:219) 
at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:169) 
at org.hibernate.engine.Cascade.cascade(Cascade.java:130) 
at org.hibernate.event.def.AbstractSaveEventListener.cascadeAfterSave(AbstractSaveEventListener.java:456) 
at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:334) 
at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:181) 
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:107) 
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:187) 
at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:33) 
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:172) 
at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:27) 
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:70) 
at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:539) 
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:527) 
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:523) 
at org.springframework.orm.hibernate3.HibernateTemplate$12.doInHibernate(HibernateTemplate.java:642) 
at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:373) 
at org.springframework.orm.hibernate3.HibernateTemplate.save(HibernateTemplate.java:639) 
at com.inception.dao.ServiceProviderDAOImpl.save(ServiceProviderDAOImpl.java:23) 
at com.inception.service.ServiceProviderServiceImpl.addServiceProvider(ServiceProviderServiceImpl.java:21) 
at com.inception.web.RegisterServiceProviderController.processFinish(RegisterServiceProviderController.java:68) 
at org.springframework.web.servlet.mvc.AbstractWizardFormController.validatePagesAndFinish(AbstractWizardFormController.java:642) 
at org.springframework.web.servlet.mvc.AbstractWizardFormController.processFormSubmission(AbstractWizardFormController.java:492) 
at org.springframework.web.servlet.mvc.AbstractFormController.handleRequestInternal(AbstractFormController.java:265) 
at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153) 
at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48) 
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:875) 
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:809) 
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:476) 
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:441) 
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637) 
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) 
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) 
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) 
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) 
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) 
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) 
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) 
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293) 
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849) 
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583) 
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454) 
at java.lang.Thread.run(Thread.java:619)

的情况是这样的：一个的ServiceProvider具有BusinessLocation的列表和一国拥有BusinessLocation的列表。

下面，我要被保留的注释类： ServiceProvider.java

import java.io.Serializable; 
import java.util.HashSet; 
import java.util.Set; 

import javax.persistence.CascadeType; 
import javax.persistence.Entity; 
import javax.persistence.FetchType; 
import javax.persistence.GeneratedValue; 
import javax.persistence.Id; 
import javax.persistence.OneToMany; 

@Entity 
public class ServiceProvider implements Serializable{ 

private Long id; 
private Set<BusinessLocation> businessLocations = new HashSet<BusinessLocation>(); 

@Id 
@GeneratedValue 
public Long getId() { 
    return id; 
} 
public void setId(Long id) { 
    this.id = id; 
} 

@OneToMany(mappedBy="serviceProvider", targetEntity=BusinessLocation.class, cascade=CascadeType.ALL, fetch=FetchType.EAGER) 
public Set<BusinessLocation> getBusinessLocations() { 
    return businessLocations; 
} 

public void setBusinessLocations(Set<BusinessLocation> businessLocations) { 
    this.businessLocations = businessLocations; 
} 

}

BusinessLocation，JAVA

import java.io.Serializable; 

import javax.persistence.Entity; 
import javax.persistence.GeneratedValue; 
import javax.persistence.Id; 
import javax.persistence.JoinColumn; 
import javax.persistence.ManyToOne; 

@Entity 
public class BusinessLocation implements Serializable{ 

private Long id; 
private String address; 
private String city; 
private State state; 
private String pincode; 
private ServiceProvider serviceProvider; 

public BusinessLocation() { 
} 

@Id 
@GeneratedValue 
public Long getId() { 
    return id; 
} 
public void setId(Long id) { 
    this.id = id; 
} 
public String getAddress() { 
    return address; 
} 
public void setAddress(String address) { 
    this.address = address; 
} 
public String getCity() { 
    return city; 
} 
public void setCity(String city) { 
    this.city = city; 
} 

@ManyToOne 
@JoinColumn(name="state_id") 
public State getState() { 
    return state; 
} 
public void setState(State state) { 
    this.state = state; 
} 
public void setPincode(String pincode) { 
    this.pincode = pincode; 
} 

public String getPincode() { 
    return pincode; 
} 

@ManyToOne 
@JoinColumn(name="serviceProvider_id") 
public ServiceProvider getServiceProvider() { 
    return serviceProvider; 
} 
public void setServiceProvider(ServiceProvider serviceProvider) { 
    this.serviceProvider = serviceProvider; 
} 
}

State.java

@Entity 
public class State implements Serializable { 

private Long id; 
private String name; 
private List<BusinessLocation> businessLocations; 

@Id 
@GeneratedValue 
public Long getId() { 
    return id; 
} 
public void setId(Long id) { 
    this.id = id; 
} 
public void setName(String name) { 
    this.name = name; 
} 

public String getName() { 
    return name; 
} 


@OneToMany(mappedBy="state", targetEntity=BusinessLocation.class, cascade=CascadeType.ALL, fetch=FetchType.EAGER) 
public List<BusinessLocation> getBusinessLocations() { 
    return businessLocations; 
} 
public void setBusinessLocations(List<BusinessLocation> businessLocations) { 
    this.businessLocations = businessLocations; 
} 

}

期待有人把我叫醒，我可能会在这里犯下。谢谢。

来源

2010-08-24 skip

感谢您的回复。我认为这个错误正在被创建，因为我无意中试图覆盖Hibernate在我的视图中为select标记设置的路径中创建的ID。

这里是我的服务和DAO类的代码： ServiceProviderServiceImpl

@Transactional 
public class ServiceProviderServiceImpl implements ServiceProviderService{ 

    private ServiceProviderDAO serviceProviderDAO; 
    public void setServiceProviderDAO(ServiceProviderDAO serviceProviderDAO) { 
     this.serviceProviderDAO = serviceProviderDAO; 
    } 

    public void addServiceProvider(ServiceProvider serviceProvider) { 
     serviceProviderDAO.save(serviceProvider); 
     for(BusinessLocation businessLocation: serviceProvider.getBusinessLocations()) { 
      businessLocation.setServiceProvider(serviceProvider); 
      serviceProviderDAO.save(businessLocation); 
     } 

    } 

}

ServiceProviderDAOImpl 公共类ServiceProviderDAOImpl实现ServiceProviderDAO {

private HibernateTemplate hibernateTemplate; 
    public void setHibernateTemplate(HibernateTemplate hibernateTemplate) { 
     this.hibernateTemplate = hibernateTemplate; 
    } 

    public void save(ServiceProvider serviceProvider) { 
     hibernateTemplate.saveOrUpdate(serviceProvider);   
    } 

    public void save(BusinessLocation businessLocation) { 
     hibernateTemplate.saveOrUpdate(businessLocation);  
    } 

}

但是，一旦我有这个问题解决我开始有以下错误：

org.springframework.dao.InvalidDataAccessApiUsageException: object references an unsaved transient instance - save the transient instance before flushing: com.inception.domain.State; nested exception is org.hibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before flushing: com.inception.domain.State 
    at org.springframework.orm.hibernate3.SessionFactoryUtils.convertHibernateAccessException(SessionFactoryUtils.java:634) 
    at org.springframework.orm.hibernate3.HibernateAccessor.convertHibernateAccessException(HibernateAccessor.java:412) 
    at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:378) 
    at org.springframework.orm.hibernate3.HibernateTemplate.save(HibernateTemplate.java:639) 
    at com.inception.dao.ServiceProviderDAOImpl.save(ServiceProviderDAOImpl.java:23) 
    at com.inception.service.ServiceProviderServiceImpl.addServiceProvider(ServiceProviderServiceImpl.java:21) 
    at com.inception.web.RegisterServiceProviderController.processFinish(RegisterServiceProviderController.java:68) 
    at org.springframework.web.servlet.mvc.AbstractWizardFormController.validatePagesAndFinish(AbstractWizardFormController.java:642) 
    at org.springframework.web.servlet.mvc.AbstractWizardFormController.processFormSubmission(AbstractWizardFormController.java:492) 
    at org.springframework.web.servlet.mvc.AbstractFormController.handleRequestInternal(AbstractFormController.java:265) 
    at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153) 
    at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48) 
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:875) 
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:809) 
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:476) 
    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:441) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:637) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) 
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) 
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293) 
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849) 
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583) 
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454) 
    at java.lang.Thread.run(Thread.java:619) 
Caused by: org.hibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before flushing: com.inception.domain.State 
    at org.hibernate.engine.ForeignKeys.getEntityIdentifierIfNotUnsaved(ForeignKeys.java:219) 
    at org.hibernate.type.EntityType.getIdentifier(EntityType.java:397) 
    at org.hibernate.type.ManyToOneType.isDirty(ManyToOneType.java:242) 
    at org.hibernate.type.TypeFactory.findDirty(TypeFactory.java:596) 
    at org.hibernate.persister.entity.AbstractEntityPersister.findDirty(AbstractEntityPersister.java:3128) 
    at org.hibernate.event.def.DefaultFlushEntityEventListener.dirtyCheck(DefaultFlushEntityEventListener.java:478) 
    at org.hibernate.event.def.DefaultFlushEntityEventListener.isUpdateNecessary(DefaultFlushEntityEventListener.java:204) 
    at org.hibernate.event.def.DefaultFlushEntityEventListener.onFlushEntity(DefaultFlushEntityEventListener.java:127) 
    at org.hibernate.event.def.AbstractFlushingEventListener.flushEntities(AbstractFlushingEventListener.java:196) 
    at org.hibernate.event.def.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:76) 
    at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:26) 
    at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1004) 
    at org.springframework.orm.hibernate3.HibernateAccessor.flushIfNecessary(HibernateAccessor.java:390) 
    at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:374) 
    ... 27 more

我把它通过为下文实体BusinessLocation.java级联属性设置为（级联= CascadeType.ALL）解决。

@ManyToOne(cascade=CascadeType.ALL) 
@JoinColumn(name="state_id") 
public State getState() { 
    return state; 
}

非常感谢您的回复:)

来源

2010-08-25 08:40:50 skip

映射看起来是正确的，并且显示您实际尝试保留ServiceProvider实例的代码会很有趣。

特别是，我会特别注意各种双向关联，以确保您在坚持之前正确设置“双方的链接”。

你可能真的要创建这个环节的管理方法，例如在ServiceProvider：

@Entity 
public class ServiceProvider implements Serializable{ 
    private Long id; 
    private Set<BusinessLocation> businessLocations = new HashSet<BusinessLocation>(); 

    @Id @GeneratedValue 
    public Long getId() { 
     return id; 
    } 
    public void setId(Long id) { 
     this.id = id; 
    } 

    @OneToMany(mappedBy="serviceProvider", targetEntity=BusinessLocation.class, cascade=CascadeType.ALL, fetch=FetchType.EAGER) 
    public Set<BusinessLocation> getBusinessLocations() { 
     return businessLocations; 
    } 

    public void setBusinessLocations(Set<BusinessLocation> businessLocations) { 
     this.businessLocations = businessLocations; 
    } 

    public void addToBusinessLocations(BusinessLocation businessLocation) { 
     this.getBusinessLocations().add(businessLocation); 
     businessLocation.setServiceProvider(this); 
    } 

    public void removeFromBusinessLocations(BusinessLocation businessLocation) { 
     this.getBusinessLocations().remove(businessLocation); 
     businessLocation.setServiceProvider(null); 
    }   
}

在State同样的事情。

未正确设置链接的两侧可能是问题的原因。

来源

2010-08-24 20:00:30

java.sql.SQLException：无法添加或更新子行：外键约束失败

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