Initailizing collection problem

soledad · **Joined:** Mon Apr 30, 2007 7:05 am **Posts:** 1

Hi all,

I have a one-to-many relationship between Wachlist class and Profile class
(a watchlist contains one or more profiles)

the mapping is like that :

Watchlist.hbm.xml
<map name="profiles" inverse="true"
cascade="all-delete-orphan">
<key column="WATCHLIST_ID" />
<map-key column="STOCK_ID" type="long" />
<one-to-many class="Profile" />
</map>

Profile.hbm.xml
<many-to-one name="watchlist" class="Watchlist" column="WATCHLIST_ID" not-null="true" unique-key="WATCHLIST_UNIQUE" cascade="lock"/>

in code i want to add a profile to a watchlist so i worte the following line

Code:

watchlist.getProfiles().put(stock.getId(),profile);

when using hibernate 3.1 CR1 the above line of code initialize the map and add the new profile successfully.

But when using hibernate 3.2.0 GA the above line of code just INITAILIZE the map and ignore the put method

to overcome this, i explicitly initialize the map

Code:

Hibernate.initialize(watchlist.getProfiles());
watchlist.getProfiles().put(stock.getId(),profile);

So I wonder if there any problem initializing the map and putting a new element at the same time when using hibernate hibernate 3.2.0 GA?
Thanks

cbredesen · **Posted:** Mon Apr 30, 2007 9:59 am

On your bidirectional association you need to manage both sides in Java (Hibernate takes care of this relationally). I highly recommend you add a method to Watchlist that does this, i.e.

Code:

getProfiles().add(..);
profile.setWatchlist(this);

http://www.hibernate.org/hib_docs/v3/re ... usingbidir

You should probably even make the getter/setter for the Map !public unless you really need to replace the entire Map.

-Chris