Hi all,
I have Car hibernate object bound to cars table; each car has its speedometer readings (List of date and speedometer value) bound to "speedometers" table,
When removing speedometer value from the car speedometer list and persisting the Car - speedometer is not deleted from the DB (save is working ok)
What am I doing wrong?
Thank you very much for your help!

CarSpeedometer object:

Car object:

Remove @JoinColumn from speedometers property.

I removed @JoinColumn annotation from speedometers property - didnt help.
Any advice will be appreciated!

Ok I think I got it, the collection reference was changed.

What happened is:

I am using Spring MVC with Form object for UI rendering

Here is flow of usage:
Controller ---> get the Truck object---> copy it to the FORM object ---> render it
User will edit the data ---> Data is copied to the FORM object ---> back to the Controller ---> get the data from the form as new object with the same ID ---> save it

Probably the truck Object lost the collection reference and didn’t invoke any delete statements.
So for example this won't work either:
Person -> phones
Person person = getPerson();
List phones = cloneToNewList(person.getPhones());

phones.remove(0);
phones.add(new phone(' 442376283-78257')); // :)
person.setPhones(phones);
persist(person);
//RESULT : new phone added but new phones won't be deleted.

Why does hibernate cares about the collection reference is not so clear when equality can be figured out thru the equals method.