我有3个表分别以客户，城市和地区命名。当客户表与城市和区连接时，城市和区被连接彼此。
当我通过hibernate保存客户信息时，错误如下所示。
org.hibernate.PersistentObjectException: detached entity passed to persist: com.bookstore.entity.City
我可以对所有这些表使用EAGER和Cascade选项，但没有任何方法可以解决问题。
这是桌子。
客户分类
@Entity
@Table(name="CUSTOMER",catalog = "JSPPROJECTDATABASE")
public class Customer implements Serializable{
...
@OneToOne(fetch = FetchType.EAGER,cascade = CascadeType.ALL)
@JoinColumn(name = "CITY")
private City city;
@OneToOne(fetch = FetchType.EAGER,cascade = CascadeType.ALL)
@JoinColumn(name = "DISTRICT")
private District district;
}
城市阶层
@Entity
@Table(name="CITY",catalog = "JSPPROJECTDATABASE")
public class City implements Serializable{
...
@OneToMany(fetch = FetchType.EAGER, mappedBy = "districtCity",cascade = CascadeType.ALL)
private Set<District> districts = new HashSet<District>();
@OneToOne(fetch = FetchType.EAGER, mappedBy = "city",cascade = CascadeType.ALL)
private Customer customer;
}
区级
@Entity
@Table(name = "DISTRICT", catalog = "JSPPROJECTDATABASE")
public class District implements Serializable {
...
@ManyToOne(fetch = FetchType.EAGER, cascade = CascadeType.ALL)
@JoinColumn(name = "CITY_ID")
private City districtCity;
@OneToOne(fetch = FetchType.EAGER, mappedBy = "district")
private Customer customer;
}
这是客户的创建选项
String customerName = request.getParameter("customer_name");
String customerSurname = request.getParameter("customer_surname");
String customerPhoneNumber = request.getParameter("customer_phoneNumber");
int cityId = Integer.parseInt(request.getParameter("city"));
int districtId = Integer.parseInt(request.getParameter("district"));
String customerAddress = request.getParameter("customer_address");
String customerZipcode = request.getParameter("customer_zipCode");
Customer newCustomer = new Customer();
newCustomer.setName(customerName);
newCustomer.setSurname(customerSurname);
newCustomer.setPhoneNumber(customerPhoneNumber);
newCustomer.setAddress(customerAddress);
newCustomer.setZipCode(customerZipcode);
City city = cityService.getCityById(cityId);
District district = districtService.getDistrictById(districtId);
newCustomer.setCity(city);
newCustomer.setDistrict(district);
customerService.createBook(newCustomer);