这人气好，一个cmp问题，请帮忙，只剩70分了！

[forumcsdn]

一对多的关系，两张表如下：

create table teacher(
teaID int not null primary key,
teaName varchar(20)
)

create table teacherInfo (
infoID int not null primary key,
teaID int not null,
infoDesc varchar(20)
constraint teaID_FK foreign key(teaID) references teacher(teaID)
)

以下代码全部在 jbuilder8和weblogic7中生成并运行：

(cmp)TeacherBean中:
public java.lang.Integer ejbCreate(Integer teaID, String teaName) throws CreateException {
setTeaID(teaID);
setTeaName(teaName);
return null;
}
public void ejbPostCreate(Integer teaID, String teaName) throws CreateException {
}



(cmp)TeacherInfoBean中:
public java.lang.Integer ejbCreate(Integer infoID,Integer teaID, String infoDesc) throws CreateException {
setInfoID(infoID);
setInfoDesc(infoDesc);
return null;
}
public void ejbPostCreate(Integer infoID,Integer teaID, String infoDesc) throws CreateException {
setTeaID(teaID);
}


sessonBean中调用上面的个cmp　：
public void addTeacher(Integer teaID,String teaName,Integer infoID,String infoDesc) {
try {
Context ctx = new InitialContext();
TeacherHome teacherHome = (TeacherHome)ctx.lookup("Teacher");
TeacherInfoHome teacherInfoHome = (TeacherInfoHome)ctx.lookup("TeacherInfo");
Teacher teacher = teacherHome.create(teaID,teaName);
TeacherInfo teacherInfo = teacherInfoHome.create(infoID,teaID,infoDesc);
teacherInfo.setTeacher(teacher);
}catch(Exception e){
e.printStackTrace();
}
}

报错为：
javax.ejb.TransactionRolledbackLocalException: EJB Exception:; nested exception
is: javax.ejb.EJBException: When a cmp-field and a cmr-field (relationship) are
mapped to the same column, the setXXX method for the cmp-field may not be called
. The cmp-field is read-only.


应该怎么解呢？？？？请指点，谢谢！！！！马上送分！！！

[asdmonster]

create table teacherInfo (
infoID int not null primary key,
teaID int not null,
infoDesc varchar(20)
constraint teaID_FK foreign key(teaID) references teacher(teaID)
)

===========================================================================
这个表的 teaID 不能为非空，因为在cmp中这个字段是不允许被操作的，相应的应该操作其对应的cmr字段（如果你没有更改的话应该是eacherInfoBean的teacher字段）。
这一点上，除非你不用cmp，否则没有任何变通的地方（一种变通是你的teacher字段属于ejbCreate()的参数，但是teaID必须为可空）