org.hibernate.PersistentObjectException:分离的实体传递给持久化

我已经成功地写了我的第一个主孩子的例子与hibernate。几天后,我再次和升级一些图书馆。不知道我做了什么,但我永远不能让它再次运行。有人会帮助我弄清楚什么是错误的代码,返回以下错误消息:

org.hibernate.PersistentObjectException: detached entity passed to persist: example.forms.InvoiceItem
    at org.hibernate.event.def.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:127)
    at org.hibernate.impl.SessionImpl.firePersist(SessionImpl.java:799)
    at org.hibernate.impl.SessionImpl.persist(SessionImpl.java:791)
    .... (truncated)

hibernate映射:

<hibernate-mapping package="example.forms">
    <class name="Invoice" table="Invoices">
        <id name="id" type="long">
            <generator class="native" />
        </id>
        <property name="invDate" type="timestamp" />
        <property name="customerId" type="int" />
        <set cascade="all" inverse="true" lazy="true" name="items" order-by="id">
            <key column="invoiceId" />
            <one-to-many class="InvoiceItem" />
        </set>
    </class>
    <class name="InvoiceItem" table="InvoiceItems">
        <id column="id" name="itemId" type="long">
            <generator class="native" />
        </id>
        <property name="productId" type="long" />
        <property name="packname" type="string" />
        <property name="quantity" type="int" />
        <property name="price" type="double" />
        <many-to-one class="example.forms.Invoice" column="invoiceId" name="invoice" not-null="true" />
    </class>
</hibernate-mapping>

编辑:InvoiceManager.java

class InvoiceManager {

    public Long save(Invoice theInvoice) throws RemoteException {
        Session session = HbmUtils.getSessionFactory().getCurrentSession();
        Transaction tx = null;
        Long id = null;
        try {
            tx = session.beginTransaction();
            session.persist(theInvoice);
            tx.commit();
            id = theInvoice.getId();
        } catch (RuntimeException e) {
            if (tx != null)
                tx.rollback();
            e.printStackTrace();
            throw new RemoteException("Invoice could not be saved");
        } finally {
            if (session.isOpen())
                session.close();
        }
        return id;
    }

    public Invoice getInvoice(Long cid) throws RemoteException {
        Session session = HbmUtils.getSessionFactory().getCurrentSession();
        Transaction tx = null;
        Invoice theInvoice = null;
        try {
            tx = session.beginTransaction();
            Query q = session
                    .createQuery(
                            "from Invoice as invoice " +
                            "left join fetch invoice.items as invoiceItems " +
                            "where invoice.id = :id ")
                    .setReadOnly(true);
            q.setParameter("id", cid);
            theInvoice = (Invoice) q.uniqueResult();
            tx.commit();
        } catch (RuntimeException e) {
            tx.rollback();
        } finally {
            if (session.isOpen())
                session.close();
        }
        return theInvoice;
    }
}

Invoice.java

public class Invoice implements java.io.Serializable {

    private Long id;
    private Date invDate;
    private int customerId;
    private Set<InvoiceItem> items;

    public Long getId() {
        return id;
    }

    public Date getInvDate() {
        return invDate;
    }

    public int getCustomerId() {
        return customerId;
    }

    public Set<InvoiceItem> getItems() {
        return items;
    }

    void setId(Long id) {
        this.id = id;
    }

    void setInvDate(Date invDate) {
        this.invDate = invDate;
    }

    void setCustomerId(int customerId) {
        this.customerId = customerId;
    }

    void setItems(Set<InvoiceItem> items) {
        this.items = items;
    }
}

InvoiceItem.java

public class InvoiceItem implements java.io.Serializable {

    private Long itemId;
    private long productId;
    private String packname;
    private int quantity;
    private double price;
    private Invoice invoice;

    public Long getItemId() {
        return itemId;
    }

    public long getProductId() {
        return productId;
    }

    public String getPackname() {
        return packname;
    }

    public int getQuantity() {
        return quantity;
    }

    public double getPrice() {
        return price;
    }

    public Invoice getInvoice() {
        return invoice;
    }

    void setItemId(Long itemId) {
        this.itemId = itemId;
    }

    void setProductId(long productId) {
        this.productId = productId;
    }

    void setPackname(String packname) {
        this.packname = packname;
    }

    void setQuantity(int quantity) {
        this.quantity = quantity;
    }

    void setPrice(double price) {
        this.price = price;
    }

    void setInvoice(Invoice invoice) {
        this.invoice = invoice;
    }
}

EDIT:从客户端发送的JSON对象:

{"id":null,"customerId":3,"invDate":"2005-06-07T04:00:00.000Z","items":[
{"itemId":1,"productId":1,"quantity":10,"price":100},
{"itemId":2,"productId":2,"quantity":20,"price":200},
{"itemId":3,"productId":3,"quantity":30,"price":300}]}

编辑:一些细节:
我试图通过以下两种方式保存发票:

>手工制作上面提到
json对象并将其传递给新鲜
会话服务器。在这种情况下绝对
在呼叫之前没有进行任何活动
保存方法所以不应该有任何打开会话
除了在保存方法中打开的那个
>使用加载现有数据
getInvoice方法和它们传递的相同
删除键值后的数据。这也是我相信
应在关闭会话之前保存为
事务正在getInvoice方法中提交。

在这两种情况下,我得到相同的错误消息,迫使我相信,使用hibernate配置文件或实体类或保存方法有问题。

请让我知道我是否应该提供更多的细节

最佳答案
你没有提供很多相关的细节,所以我猜你调用了getInvoice,然后你使用结果对象设置一些值,并调用保存假设你的对象更改将被保存。

但是,持久化操作用于全新的临时对象,如果已经分配了id,它将失败。在你的情况下,你可能想调用saveOrUpdate而不是persist。

你可以在这里找到一些讨论和参考“detached entity passed to persist error” with JPA/EJB code

转载注明原文:org.hibernate.PersistentObjectException:分离的实体传递给持久化 - 代码日志