[英]cascade = CascadeType.ALL not updating the child table
这些是我的pojo课
Orderdetail.java
package online.model;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;
@Entity
@Table(name = "orderdetail")
public class OrderDetail {
@Id
@Column(name="order_detail_id")
private int order_detail_id;
@Column(name="bill")
private float bill;
@ManyToOne
@JoinColumn(name = "p_id" )
private Product p_id;
@ManyToOne
@JoinColumn(name = "o_id" )
private Order o_id;
public int getOrder_detail_id() {
return order_detail_id;
}
public void setOrder_detail_id(int order_detail_id) {
this.order_detail_id = order_detail_id;
}
public float getBill() {
return bill;
}
public void setBill(float bill) {
this.bill = bill;
}
public Product getP_id() {
return p_id;
}
public void setP_id(Product p_id) {
this.p_id = p_id;
}
public Order getO_id() {
return o_id;
}
public void setO_id(Order o_id) {
this.o_id = o_id;
}
}
我的Order.java
package online.model;
import java.util.Date;
import java.util.List;
import java.util.Set;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.OneToMany;
import javax.persistence.Table;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
@Entity
@Table(name = "ordertable")
public class Order {
@Id
@Column(name = "order_id")
private int order_id;
@OneToMany(mappedBy = "o_id",cascade = CascadeType.ALL, fetch = FetchType.LAZY)
private List<OrderDetail> orderdetail;
@ManyToOne
@JoinColumn(name = "u_id")
private UserDetail u_id;
public UserDetail getU_id() {
return u_id;
}
public void setU_id(UserDetail u_id) {
this.u_id = u_id;
}
@Column(name = "date")
@Temporal(TemporalType.TIMESTAMP)
private Date date;
@Column(name = "totalbill")
private Float totalbill;
public Float getTotalbill() {
return totalbill;
}
public void setTotalbill(Float totalbill) {
this.totalbill = totalbill;
}
public List<OrderDetail> getOrderdetail() {
return orderdetail;
}
public void setOrderdetail(List<OrderDetail> orderdetail) {
this.orderdetail = orderdetail;
}
public int getOrder_id() {
return order_id;
}
public void setOrder_id(int order_id) {
this.order_id = order_id;
}
public Date getDate() {
return date;
}
public void setDate(Date date) {
this.date = date;
}
}
每当我尝试保存订单类时,我都希望也保存我的orderdetail类,但是当我尝试按顺序保存列表时,没有得到保存,并且hibernate没有提供可以帮助您的错误...感谢帮助
当我试图坚持订单类时
Hibernate: select orderdetai_.order_detail_id, orderdetai_.bill as bill7_, orderdetai_.o_id as o3_7_, orderdetai_.p_id as p4_7_ from orderdetail orderdetai_ where orderdetai_.order_detail_id=?
这就是我得到的输出。
这是我保存类的代码
@Override
public boolean payment(String username, Integer ordernumber, Date date,
Float totalbill, List<Integer> list) {
Session session = sessionFactory.openSession();
Transaction tranction = session.beginTransaction();
try {
Query query = session
.createQuery("from UserDetail where user_username = :username");
query.setParameter("username", username);
List<UserDetail> userdetaillist = query.list();
UserDetail userdetail = userdetaillist.get(0);
query = session
.createQuery("from ProductDetail where product_detail_id in(:list)");
query.setParameterList("list", list);
List<ProductDetail> productdetail = query.list();
Order order = new Order();
order.setOrder_id(ordernumber);
order.setDate(date);
order.setU_id(userdetail);
order.setTotalbill(totalbill);
List<OrderDetail> orderdetail = new ArrayList<OrderDetail>();
OrderDetail ordetail = new OrderDetail();
for (ProductDetail pro : productdetail) {
ordetail.setO_id(order);
ordetail.setP_id(pro.getProduct_id());
ordetail.setBill(pro.getProduct_id().getProduct_sell_price());
orderdetail.add(ordetail);
}
System.out.print("totalbill" + totalbill);
System.out.println(orderdetail);
order.setOrderdetail(orderdetail);
session.save(order);
tranction.commit();
return true;
} catch (Exception e) {
tranction.rollback();
e.getStackTrace();
}
return false;
}
我认为必须在for内部创建ordetail。您正在为每个productdetail修改相同的对象。 应该是这样的:
List<OrderDetail> orderdetail = new ArrayList<OrderDetail>();
OrderDetail ordetail = null;
for (ProductDetail pro : productdetail) {
ordetail = new OrderDetail();
ordetail.setO_id(order);
ordetail.setP_id(pro.getProduct_id());
ordetail.setBill(pro.getProduct_id().getProduct_sell_price());
orderdetail.add(ordetail);
}
嘿,我重新检查了我的pojo课,发现了我做的错误。 我进行了更改,并且现在可以正常工作。 我没有设置Orderdetail表的ID。 它是数据库中的自动增量。 因此,它给了我错误“”,因此我在orderdetail iD中进行了更改“ @GeneratedValue(strategy = GenerationType.AUTO)”。现在它可以正常工作,因为现在休眠知道该ID将从数据库获取值。 感谢您的帮助和您的时间
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