Re: How to uninsert an EO from EC?
Re: How to uninsert an EO from EC?
- Subject: Re: How to uninsert an EO from EC?
- From: Marek Wawrzyczny <email@hidden>
- Date: Tue, 2 Nov 2004 17:14:07 +1100
Just checked :) In this case the scenario:
Three EOs:
Payment:
-> enrolments, Delete rule: nullify
Student:
-> enrolments, Delete rule: nullify
Enrolment:
-> student, Delete rule: nullify
-> payment, Delete rule: nullify
-> course, Delete rule: nullify
We manage the deletion of objects manually... the cascade deletion rule
scares me in the case of this collection of EOs.
On 02/11/2004, at 15:29, Chuck Hill wrote:
I take it there were no back pointing relationships to the referring
objects with a nullify delete rule?
At 03:08 PM 02/11/2004 +1100, Marek Wawrzyczny wrote:
Thanks for all the replies,
Indeed, ec.deleteObject(eo) works on a new EO, but... make sure
nothing
references it, that's where we went wrong.
If you don't explicitly remove the EO from all the relationships you
have added it to, it is still saved to the database. And it seems that
the only reliable way to remove the object from relationships is by
using the removeObjectFromBothSidesOfRelationshipWithKey(...)
function.
On 28/10/2004, at 12:25, Marek Wawrzyczny wrote:
Hi,
How does one correctly remove/forget/discard/kill/obliterate a new,
uncommitted EO from an editing context? The EOEditingContext methods
seem to be designed for EOs that have already been committed to the
database.
I have never been able to find the correct way to do this without
resorting to a combination of calls to EC forgetObject(...) and
deleteObject(...), removal of any references through relationships,
etc... and every now and then end up creating the EO with nulled
relationships anyway in the database when saving the ec.
It all seems like a bit of black magic to me.
Marek Wawrzyczny
software engineer
-------------------------->
ish group pty ltd
http://www.ish.com.au
7 Darghan St Glebe 2037 Australia
phone +61 2 9660 1400 fax +61 2 9660 7400
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Marek Wawrzyczny
software engineer
-------------------------->
ish group pty ltd
http://www.ish.com.au
7 Darghan St Glebe 2037 Australia
phone +61 2 9660 1400 fax +61 2 9660 7400
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Chuck Hill email@hidden
Global Village Consulting Inc.
http://www.global-village.net
Marek Wawrzyczny
software engineer
-------------------------->
ish group pty ltd
http://www.ish.com.au
7 Darghan St Glebe 2037 Australia
phone +61 2 9660 1400 fax +61 2 9660 7400
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