ejb3.0 删除对象的时候报错,请求各位哥们帮帮忙

com.keqisoft.model.Mapping#
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数据库里没有你要删除的记录。用过Hibernate的都知道，被删除的对象一定是持久态的，也就是说数据库一定要有的。JPA其实就是以Hibernate为基础的一种标准。

补充一下：
楼主要删除的对象要么是数据库里没有的，要么是一个游离的(例如new出来的且id==null or ="")

我晕，之前的回复不知道按了什么都没有了！如果是游离态对象的话，可以使用 EntityManager#merge 使其成为受托管状态，这样就可以删除了。我一般都是使用 JPQL 语句：DELETE FROM User u WHERE u.id = :id 这样删除的。

建议先load一下(别用get)，如果报错就跳过，否则删除。

先谢谢各位哥们
我补充一下，我这个删除是级联删除，
/**
* user info
* @author ygao
*
*/
@Entity
@Table(name = "sysUserInfo")
@NamedQueries( {
@NamedQuery(name = "findALlSysUserInfo", query = "SELECT u From SysUserInfo u order by u.disseq"),
@NamedQuery(name = "findSysUserInfo", query = "SELECT u FROM SysUserInfo u WHERE u.username=:username and u.password=:password and u.avaflag='0'"),
@NamedQuery(name = "findSysUserInfoById", query = "SELECT u FROM SysUserInfo u WHERE u.userid=:userid"),
@NamedQuery(name = "findSysUserInfoByUserName", query = "SELECT u FROM SysUserInfo u WHERE u.username=:username and u.avaflag='0'"),
@NamedQuery(name = "findSysUserInfoByName", query = "SELECT u FROM SysUserInfo u WHERE u.username like :username")
})
@Replicable
public class SysUserInfo implements Serializable{ private static final long serialVersionUID = -3811809093393098370L;

/**
* User ID
*/
@Id
@Column(name="userid")
private String userid ;
/**
* Domain
*/
@ManyToOne(fetch = FetchType.EAGER)
@JoinColumn(name="domainid",
referencedColumnName="domainId")
private Domain domain = null;

@OneToMany(mappedBy="sysUserInfo" ,fetch=FetchType.EAGER,cascade = {CascadeType.REMOVE})
private Set<SysUserRoleOpp> sysUserRoleOpp;

@OneToMany(mappedBy="sysUserInfo" ,fetch=FetchType.EAGER,cascade = {CascadeType.REMOVE})
private Set<Mapping> mapping;

public Set<Mapping> getMapping() {
return mapping;
}
public void setMapping(Set<Mapping> mapping) {
this.mapping = mapping;
}
/**
* User Name
*/
private String username ;
/**
* User Password
*/
private String password ;
/**
* User RealName
*/
private String realname ;
/**
* User Idecard
*/
private String idecard ;
/**
* User Linkpho
*/
private String linkpho ;
/**
* User AvaFlag
*/
private String avaflag ;
/**
* ͳUser Disseq
*/
private int disseq ;
/**
* User Re
*/
private String re ;
/**
* User Moduserid
*/
private String moduserid ;

/**
* @return the userid
*/
public String getUserid() {
return userid;
}
/**
* @param userid the userid to set
*/
public void setUserid(String userid) {
this.userid = userid;
}

/**
* @return the username
*/
@Column(nullable = false)
public String getUsername() {
return username;
} /**
* @param username the username to set
*/
public void setUsername(String username) {
this.username = username;
}
/**
* @return the password
*/

public String getPassword() {
return password;
}
/**
* @param password the password to set
*/

public void setPassword(String password) {
this.password = password;
}
/**
* @return the realname
*/
@Column(nullable = false)
public String getRealname() {
return realname;
} /**
* @param realname the realname to set
*/
public void setRealname(String realname) {
this.realname = realname;
}
/**
* @return the idecard
*/
public String getIdecard() {
return idecard;
}
/**
* @param idecard the idecard to set
*/
public void setIdecard(String idecard) {
this.idecard = idecard;
}
/**
* @return the linkpho
*/
public String getLinkpho() {
return linkpho;
}
/**
* @param linkpho the linkpho to set
*/
public void setLinkpho(String linkpho) {
this.linkpho = linkpho;
}
/**
* @return the avaflag
*/
public String getAvaflag() {
return avaflag;
}
/**
* @param avaflag the avaflag to set
*/
public void setAvaflag(String avaflag) {
this.avaflag = avaflag;
}
/**
* @return the disseq
*/
public int getDisseq() {
return disseq;
}
/**
* @param disseq the disseq to set
*/
public void setDisseq(int disseq) {
this.disseq = disseq;
}
/**
* @return the re
*/
public String getRe() {
return re;
}
/**
* @param re the re to set
*/
public void setRe(String re) {
this.re = re;
}
/**
* @return the moduserid
*/
public String getModuserid() {
return moduserid;
}
/**
* @param moduserid the moduserid to set
*/
public void setModuserid(String moduserid) {
this.moduserid = moduserid;
}
public Domain getDomain() {
return domain;
}
public void setDomain(Domain domain) {
this.domain = domain;
}
public Set<SysUserRoleOpp> getSysUserRoleOpp() {
return sysUserRoleOpp;
}
public void setSysUserRoleOpp(Set<SysUserRoleOpp> sysUserRoleOpp) {
this.sysUserRoleOpp = sysUserRoleOpp;
}}@Entity
@Table(name="mapping")
@NamedQueries( {
@NamedQuery(name = "findALlMapping", query = "SELECT c From Mapping c ")})
@Replicable
public class Mapping implements Serializable{
private static final long serialVersionUID = -5050786782338035968L;

/*
* Host serviceid ,also inner id of HyperCloud service
*/
@Id
@Column(name="mappingId")
private String mappingId;

@ManyToOne()
@JoinColumn(name="userid",
referencedColumnName="userid")
private SysUserInfo sysUserInfo;

@ManyToOne()
@JoinColumn(name="vmid",
referencedColumnName="vmid")
private VirtualMachine virtualMachine;

public SysUserInfo getSysUserInfo() {
return sysUserInfo;
} public void setSysUserInfo(SysUserInfo sysUserInfo) {
this.sysUserInfo = sysUserInfo;
} public VirtualMachine getVirtualMachine() {
return virtualMachine;
} public void setVirtualMachine(VirtualMachine virtualMachine) {
this.virtualMachine = virtualMachine;
} public String getMappingId() {
return mappingId;
} public void setMappingId(String mappingId) {
this.mappingId = mappingId;
}}
配的是sysUserInfo对象与 mapping对象一对多的关系。
在删除sysUserInfo对象时，应该把mapping对象也一起删除。现在就出现了我说的这个错误。
问题还是没有解决，希望各位哥们再帮帮忙

Mapping不仅仅是与SysUserInfo发生关系，还有一个多对一的VirtualMachine，那么virtualMachine属性上的@ManyToOne()中应该配置上级联删除。
另外还需到底层数据库管理系统中检查级联删除关系有没有配好(SQL Server中是将级联删除前面的勾勾上)。
也可以分步来做，先解除SysUserInfo与Mapping的关系(先删除Mapping)，再删除SysUserInfo。

好像不能在virtualMachine属性上配置级联删除，这样的话会删除我的VirtualMachine了。
怎么样解除SysUserInfo与Mapping的关系啊。

调试易

ejb3.0 删除对象的时候报错,请求各位哥们帮帮忙

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