我最近开始在java中使用hibernate。
我有一个像这样的实体工作人员:
final public class Staff {
@Id @GeneratedValue
private int staffId;
private String firstName;
private String lastName;
private String Email;
@OneToOne(cascade = CascadeType.ALL)
@JoinColumn(name = "auth_id", nullable = false)
private Authentication auth;
//And all the getters and setters
}
我的身份验证类:
final public class Authentication {
@Id @GeneratedValue
@Column(name="auth_id")
private int authId;
private String pwd;
private String secretQuestion;
private String secretAnswer;
//And all the getters and setters
}
要登录,我需要查看电子邮件和密码。所以我创建了一个哈希地图:
Map<String, String> requirements =
new HashMap<String, String>();
requirements.put("Email", "example@example.com");
requirements.put("auth.pwd", "password");
然后运行查询:
Criteria criteria = session.createCriteria(currentClass);
criteria.add(Restrictions.allEq(requirements));
staffList = (ArrayList<Staff>) criteria.list();
但是我得到了这个例外:
org.hibernate.QueryException: could not resolve property: auth.pwd of: models.Staff
我的问题是:我们如何为实体内的实体设置限制?
如果我遗漏了我应该提及的任何其他信息,请告诉我。谢谢!
答案 0 :(得分:1)
为auth
实体的Staff
属性使用别名:
Criteria crit = session.createCriteria(Staff.class, "staff");
crit.createAlias("auth", "a"); // Create alias for auth
crit.add(Restrictions.like("a.propertyName", propertyValue+"%"));