CODEWITHSUNDEEP
javaspringhibernate
Akhil K Nambiar
Akhil K Nambiar

Reputation: 3975

Beginner : Springs with Hibernate 4 doubts

My Hibernate.xml

<bean id="transactionManager"
    class="org.springframework.orm.hibernate4.HibernateTransactionManager">
    <property name="sessionFactory" ref="sessionFactory" />
</bean>

<tx:annotation-driven transaction-manager="transactionManager" />

My controller

    @RequestMapping("/")
public String index() {
    Category category = new Category();
    category.setName("Hello");
    categoryDao.saveCategory(category);
    return "index";
}

My DAO

@Transactional
public void saveCategory(Category category) {
    Session session = sessionFactory.getCurrentSession();
    session.save(category);
    Category category2 = (Category) session.get(Category.class,
            new Integer(0));

    System.out.println("xxxx" + category2.getName());
}

I skipped my BO currently for testing purpose. Otherwise am I going somewhere? My output should have been xxxxParent which is the name of category at id = 0 however its showing xxxxHello which is being passed from Controller. Otherwise insertion is working properly. Also is there any mistake in the way am trying to access DB via Hibernate. I mean using transactional annotation or opening session.

EDIT

When I deleted the codes for saving new category the correct output is shown. On checking the console previously only insert was working but now select is also working.

Upvotes: 0

Views: 142

Answers (1)

Dhanush Gopinath
Dhanush Gopinath

Reputation: 5749

I feel the code

Category category = new Category();
category.setName("Hello");`

is creating an entity with id 0 (integer defaults to 0 if not declared) and is updating the existing entity in the DB. I don't see you explicitly setting the ID here. Please set the id and see.

Upvotes: 1

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