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POUnable to persist a transient object with composite key
 

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    <p>I have a <code>Hibernate(3.3)</code> entity <code>Basket</code>: </p> <pre><code>@Entity @Table(name = "BASKETS") @IdClass(BasketId.class) public class Basket { @ManyToOne @Id @JoinColumn(name = "id_order", referencedColumnName = "id_o") private Order id_order; @ManyToOne @Id @JoinColumn(name = "id_item", referencedColumnName = "id_i") private Item id_item; private int amount; public Basket() {} // generated getters and setters } </code></pre> <p>with the <code>BasketId</code> as is:</p> <pre><code>@Embeddable public class BasketId implements Serializable { private int id_order; private int id_item; public BasketId() {} public BasketId(Order o, Item i) { id_order = o.getId_o(); id_item = i.getId_i(); } // public BasketId(int id_order, int id_item) { // this.id_item = id_item; // this.id_order = id_order; // } //generated getter and setters } </code></pre> <p>The problem is when I want to save a transient <code>Order</code> with autowired <code>SessionFactory session</code> as <code>session().save(o)</code>:</p> <pre><code>@Entity @Table(name = "ORDERS") public class Order { @Id @GeneratedValue @Column(name = "id_o") private int id_o; @Column(name = "date") private Timestamp date; @OneToMany(mappedBy = "id_order") private Set&lt;Basket&gt; basketItems; public Order() {} //generated getter and setters } </code></pre> <p>I get the foolowing exception:</p> <pre><code>message Request processing failed; nested exception is org.hibernate.PropertyAccessException: could not set a field value by reflection setter of foo.server.hib.BasketId.id_item description The server encountered an internal error that prevented it from fulfilling this request. exception org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.hibernate.PropertyAccessException: could not set a field value by reflection setter of foo.server.hib.BasketId.id_item org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:894) org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:789) root cause org.hibernate.PropertyAccessException: could not set a field value by reflection setter of foo.server.hib.BasketId.id_item org.hibernate.property.DirectPropertyAccessor$DirectSetter.set(DirectPropertyAccessor.java:114) org.hibernate.tuple.component.AbstractComponentTuplizer.setPropertyValues(AbstractComponentTuplizer.java:104) ... root cause java.lang.IllegalArgumentException: Can not set int field foo.server.hib.BasketId.id_item to foo.server.hib.Item sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:146) sun.reflect.UnsafeIntegerFieldAccessorImpl.set(UnsafeIntegerFieldAccessorImpl.java:80) ... </code></pre> <p>The item in the stacktrace is: </p> <pre><code>public class Item { //other fields @OneToMany(mappedBy = "id_item") private Set&lt;Basket&gt; basketsWithThisItem; public Item() {} //generated getter and setters } </code></pre> <hr> <p>I tried with different constructors of <code>BasketId</code> (as <code>(Item, Order)</code>, and <code>(int,int)</code>) as show above, and added <code>Object</code> constructors to <code>Basket</code>. Next was doing a <code>merge()</code> instead of <code>save()</code> but nothing helps. </p> <p>Thanks in advance.</p> <p><strong>EDIT</strong> Getters and Setters are there. I use the create function implemented as:</p> <pre><code>@Transactional public class HibOrderService implements OrderService { @Autowired private SessionFactory sessionFactory; public Session session() { return sessionFactory.getCurrentSession(); } @Override public void create(Order o) { session().merge(o); } } </code></pre>
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    1. USCornelius
    1. USCornelius
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    1. COcan u show me the code for saving
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    2. COThe code is there @PSR. I added it in the edit, but it was already given in the post between BasketId and Order.
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      1. USCornelius
 

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