@Table("sys_user")
@TableIndexes({@Index(name = "INDEX_SYS_USER_LOGINNAMAE", fields = {"loginname"}, unique = true)})
public class Sys_user extends BaseModel implements Serializable {
 @Column
    @Name
    @Comment("ID")
    @ColDefine(type = ColType.VARCHAR, width = 32)
    @Prev(els = {@EL("uuid()")})
    private String id;

    @Column
    @Comment("用户名")
    @ColDefine(type = ColType.VARCHAR, width = 120)
    private String loginname;

    @Column
    @Comment("密码")
    @ColDefine(type = ColType.VARCHAR, width = 100)
    private String password;

@Column
    @Comment("微信登录unionid")
    @ColDefine(type = ColType.VARCHAR, width = 100)
    private String unionid;

后台获取数据时,除了unionid都能得到,只有它为空,但是数据库里面确定有值.怎么回事