[DDC-1507] State change detection for version incrementation (for optimistic locking) in combination with orphanRemoval Created: 23/Nov/11  Updated: 27/Nov/11

Status: Open
Project: Doctrine 2 - ORM
Component/s: ORM
Affects Version/s: 2.1.4
Fix Version/s: None
Security Level: All

Type: Improvement Priority: Major
Reporter: Georg Wächter Assignee: Benjamin Eberlei
Resolution: Unresolved Votes: 1
Labels: None


 Description   

As i understand the documentation correctly, orphanRemoval associations have the meaning of a "part of" relationship. In the example (http://www.doctrine-project.org/docs/orm/2.0/en/reference/working-with-associations.html#orphan-removal) the adresses are part of the contact.

In my opinion we should reason that the state of the adress consists of the states of all nested contacts. As a consequence we should flag the contact as "dirty" when the adresses change.

This is relevant for optimistic locking scenarios or event handlers. In my application i tried to use optimistic locking for "contacts", which does not work if i don't change anything in the contact but only in the nested addresses.



 Comments   
Comment by Benjamin Eberlei [ 27/Nov/11 ]

This is still only an approvement, you can workaround this and handle is in your domain code.

Comment by Georg Wächter [ 27/Nov/11 ]

Not in all cases. The first problem is that my domain code can't modify the version property, doctrine seems to block any manipulations to it. So i'm not able to increment the variable myself.

The only solution is to implement optimistic locking on my own or to add a dummy persistent boolean field that gets inversed by my domain code .. which would trigger the doctrine implementation for the optimistic locking.

I think it's clear that the second option shouldn't be a choice. If doctrine doesn't handle the overall case exactly it should allow me to increment the version number myself.

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