现在有两个表。用户表s_user对应实体类SUser和用户在线表s_online对应实体类SO
nline,我要通过s_user的主键userid对s_online的主键userid进行关联查询,
其中这个s_user已经跟另外两个表进行关联查询,我就照样画葫芦加上相同的标记,然后启动tomcat的时候报错broken column mapping for: sOnline.id of: com.cn.model.SUser。
然后我再去SOnline查看sOnline属性什么情况,原来是加了一堆注解,,是一个复合主键,,我不清楚什么是复合主键,,,反正现在就是想知道怎么通过注解用s_user的userid字段查出SOnline对应的userid字段,,求帮忙
@ManyToOne
@JoinColumn(name = "groupid", insertable = false, updatable = false)
public SUsergroup getUsergroup() {
return usergroup;
}
public void setUsergroup(SUsergroup usergroup) {
this.usergroup = usergroup;
}
@ManyToOne
@JoinColumn(name = "rateid", insertable = false, updatable = false)
public SRate getsRate() {
return sRate;
}
public void setsRate(SRate sRate) {
this.sRate = sRate;
}
SOnline复合主键部分代码
private SOnlineId id;
@EmbeddedId
@AttributeOverrides({
@AttributeOverride(name = "userid", column = @Column(name = "userid", nullable = false, length = 16)),
@AttributeOverride(name = "acctstart", column = @Column(name = "acctstart", nullable = false, length = 29)),
@AttributeOverride(name = "acctid", column = @Column(name = "acctid", nullable = false, length = 32)) })
public SOnlineId getId() {
return this.id;
}
public void setId(SOnlineId id) {
this.id = id;
}