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Hibernate Many-to-One mapping

Deepaks Deshpande
Ranch Hand

Joined: Dec 06, 2007
Posts: 111

Dear All,
I am having trouble implementing Many-to-one mapping in hibernate. I have the done the following:
I have a table called Users and another table called Rank. The relationship between the two is that many users can have the same rank. So it is Many-to-One mapping. The Users and Rank tables are as follows:


The mapping files are as follows:


I am using hibernate template to insert the values in the Users table. The rank is a combobox item in the registration form. Each rank has an ID associated with it which has to be inserted in the users table's 'rankid' column.
The code for this is as follows:


My Form Controller is as follows:


When ever i try to register a new user, it is not calling the form controller. Am I doing something wrong?
Please help.
Thank you.


Regards,
Deepak

Bill Gorder
Bartender

Joined: Mar 07, 2010
Posts: 1649
    
    7

At this point it is not an ORM problem it is a Spring / JSP problem. You have a form and when you submit that form you are not getting inside your controller.

Here are my suggestions:

1. Forget about hibernate altogether you are not even getting far enough to have issues with that yet. When you do get to it do not use HIbernateTemplate. The use of this is deprecated, and is no longer needed. See the Spring reference manual for the modern way using the standard API's rather than a template.
2. Do not use SimpleFormController this also is old and deprecated. Use the modern controller style and the newest version of Spring.

Start with updating your Spring (if needed) and your controllers and get that piece working. If you need more help with that then post in our Spring forum. This link will get you started if you need an example:

http://blog.springsource.org/2010/07/22/spring-mvc-3-showcase/
https://github.com/SpringSource/spring-mvc-showcase (source code)

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subject: Hibernate Many-to-One mapping