How to avoid unncessary selects when having combo boxes?

pasha · **Joined:** Sat Nov 27, 2004 4:13 am **Posts:** 137

Hi
Hibernate promises that it lets us use correct object model.

In my application I have some code-description types which are referenced by some other objects (for example country for an address), what is the best practice to reference to these objects in web GUI?

I use combo boxes in web tier, and use the primary key of referenced object as value for combo box. Must I retrieve the code-description object using its primary key and then assign it to other objects? I think this is agains performance.

for example:

Code:

public class Country{
  private Long id;
  private String name;
  ...
}

public class Address{
  private Long id;
  private Country country;
...
}

should I do as follow:

Code:

   Coutnry country = (Country)session.get(country.class, countryId);
   address.setCountry(country);
   session.save(address);

or can I do the job without retrieving the Country object (which is not necessary, because only its primary key is needed in updating the database).

michael · **Posted:** Sat Nov 27, 2004 11:19 am

Make country proxyable and use load in the code you posted