Update collection in Hibernate

Faeton · **Joined:** Sat Feb 06, 2010 11:25 am **Posts:** 3

Hello
I've got the following problem: I have class Product , and the list(ArrayList) of objects Feature (class Feature) in this class This list is mapped by @OneToMany(fetch = FetchType.EAGER,cascade = CascadeType.ALL ) Class Feature is not connected to class Product by any relationship. So connection is singledirectional
Hibenate creates a table "prduct_feature" for associating primary keys from both tables
I save class Product by:

Code:

getHibernateTemplate().save(product);

In this case everything saves properly, But if i try to update the product i will meet the following problem:
for example i've got the following lines in table Features: 1 2 3 They all belongs to the same product - product1
if i change 3 to 4 and perform :

Code:

getHibernateTemplate().update(product1);

i will get the following lines in my Features table - 1 2 3 1 2 4 => it means that everytime i update my product i've got new Features list for it
So, i can't understand the reason of such behaviour
Please tell me how can i solve such problem, or is it possible at all? Thanks...

pb00067 · **Joined:** Tue Jun 16, 2009 3:36 am **Posts:** 990

How do you change 3 to 4 exactly ?
Can you please attach your source code.

Faeton · **Joined:** Sat Feb 06, 2010 11:25 am **Posts:** 3

I've found the reason of the problem
It was my mistake
Thanks!

Cameron McKenzie · **Posted:** Wed Feb 10, 2010 8:50 am

Well, what was the mistake???

Faeton · **Joined:** Sat Feb 06, 2010 11:25 am **Posts:** 3

Every time while editing Product the new instance of Feature was created
The code is not mine, so i had no idea about the reasons of such behaviour