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POJPA2:i persist a entity ,there is no exception but the data is not saved in database
 

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  1. POJPA2:i persist a entity ,there is no exception but the data is not saved in database
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    <p>I am using EJB to write a CRUD demo code on netbeans..when i write a code that can save data into database ,there is no error and exception but the data is not saved in database code:</p> <p>entitybean:</p> <pre><code> @Entity @Table(name = "book_book") @XmlRootElement @NamedQueries({ @NamedQuery(name = "BookBook.findAll", query = "SELECT b FROM BookBook b"), @NamedQuery(name = "BookBook.findByIsbn", query = "SELECT b FROM BookBook b WHERE b.isbn = :isbn"), @NamedQuery(name = "BookBook.findByDealTotal", query = "SELECT b FROM BookBook b WHERE b.dealTotal = :dealTotal"), @NamedQuery(name = "BookBook.findBySaleTotal", query = "SELECT b FROM BookBook b WHERE b.saleTotal = :saleTotal"), @NamedQuery(name = "BookBook.findBySalePrice", query = "SELECT b FROM BookBook b WHERE b.salePrice = :salePrice"), @NamedQuery(name = "BookBook.findByDealPrice", query = "SELECT b FROM BookBook b WHERE b.dealPrice = :dealPrice")}) public class BookBook implements Serializable { private static final long serialVersionUID = 1L; @Id @Basic(optional = false) // @NotNull @Column(name = "isbn") private Long isbn; @Column(name = "deal_total") private Integer dealTotal; @Column(name = "sale_total") private Integer saleTotal; @Column(name = "sale_price") private Integer salePrice; @Column(name = "deal_price") private Integer dealPrice; @OneToMany(mappedBy = "isbn") private List&lt;BookBookdetail&gt; bookBookdetailList; </code></pre> <p>DAClass(not a sessionbean):</p> <pre><code> EntityManagerFactory factory=Persistence.createEntityManagerFactory("BookXPU"); EntityManager em=factory.createEntityManager(); public long createBook(Long isbn, Integer dealTotal, Integer saleTotal, Integer salePrice, Integer dealPrice){ BookBook book=new BookBook(); book.setDealTotal(dealTotal); book.setSalePrice(salePrice); book.setDealTotal(dealTotal); book.setDealPrice(dealPrice); book.setIsbn(isbn); List&lt;BookBookdetail&gt; list=new ArrayList&lt;BookBookdetail&gt;(); book.setBookBookdetailList(null); em.persist(book); Query query =em.createQuery("SELECT b FROM BookBook b WHERE b.isbn = :isbn"); query.setParameter("isbn",book); List list1=query.getResultList(); for (Iterator it = list1.iterator(); it.hasNext();) { BookBookDetail book1 = (BookBookDetail)it.next(); list.add(book1); } book.setBookBookdetailList(list); em.merge(book); return book.getIsbn(); } </code></pre> <p>Thanks...</p>
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    1. USuser996505
    1. USuser996505
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      1. POJPA2:i persist a entity ,there is no exception but the data is not saved in database
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      1. VTUpMod
    2. VO
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      1. VTUpMod
    1. COi try to test this code in a sessionbean and success...
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      1. USuser996505
    2. COSo, you did try and it works? Is there any problem with this code? You can't see the result in the database or using the query in the code?
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      1. USPiotr Nowicki
    3. COif this code in a common java class..i can't see the result in the database...i had to change the common class into stateless sessionbean...and i can see the result then ..but can you tell me how can i change the code in order to be success in common java class
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      1. USuser996505
 

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