为什么我收到错误“HV000030：找不到类型为：java.lang.Integer的验证器。”

Question

我收到以下错误，

"HV000030: No validator could be found for type: java.lang.Integer."

我的MySQL表格如下所示，

员工

雇主

我的JPA实体位于下方，

@Entity
@Table(name = "employee")
public class Employee implements java.io.Serializable {

@Id
@GeneratedValue(strategy = GenerationType.AUTO) 
private Integer id;

@JoinColumn(name = "employer_id", nullable = false)
@ManyToOne(fetch = FetchType.EAGER)
private Employer employer;

getter and setter ....

}

@Entity
@Table(name = "employer")
 public class Employer implements java.io.Serializable {

@Id
@GeneratedValue(strategy = GenerationType.AUTO) 
@NotNull
private Integer id;

@Column(name = "city")
@Size(max = 16)
private String city;

getter and setter...
}

我的服务器日志显示错误，

at org.hibernate.jpa.internal.QueryImpl.getResultList(QueryImpl.java:449)
at com.mycompany.server.facade.EmployeeFacade.getEmployeesByEmployer(EmployeeFacade.java:38)

我的门面课是，

    line 35: public List<Employee> getEmployeesByEmployer(@NotNull Employer employer) {
line 36:     return getEntityManager().createQuery("from Employee where employer.id = :employerId").
line 37:             setParameter("employerId", employer.getId()).
line 38:             getResultList();
line 39: }

我在尝试从Employers rest资源访问facade方法时遇到此错误。 请帮助我提供详细信息。

Answer 1

只不过是狂野的猜测; AFAIK编号（9）将始终适合java Integer，但数字（10）不会。

尝试将int的长度降低到9（或更低）数字。