Re: Empty relationship that isn't null
Re: Empty relationship that isn't null
- Subject: Re: Empty relationship that isn't null
- From: Chuck Hill <email@hidden>
- Date: Wed, 18 May 2005 13:12:59 -0700
We are talking about a specific object that is related to a specific
row in the database. Does that row have a non-null value for the
EntityB FK? If so, is it valid or do you have a referential integrity
problem in your data? If you have a referential integrity problem
(which is what it sounds like), then you are seeing what is called a
"Dummy Fault EO" see
http://lists.apple.com/archives/webobjects-dev/2003/Aug/msg00433.html
and other Google hits.
Chuck
On May 18, 2005, at 12:46 PM, DevReseune wrote:
Hi,
It's an optional to-one relationship, there is none EntityB in
database, and the entityB FK is null by default, but this property is
hidden (not the related object, but its ID).
I don't understand.
Frédéric
Le 16 mai 05 à 21:24, Chuck Hill a écrit :
This is a to-one relationship? Is it marked as optional or
mandatory? Is the entityB FK in the EntityA object null, or does it
have a value?
Chuck
On May 16, 2005, at 11:19 AM, DevReseune wrote:
Hi,
I have 2 entities bound with a relationship:
- EntityA
- entityB -> EntityB
- EntityB
When I fetch an EntityA, the relationship entityB is initialited
with an EOAccessDeferredFaultHandler (takeStoredValueForKey) while
the SQL select statement returns 0 row.
When I try to access to the relationship entityB, it is updated with
an _EOVectorKeyGlobalID (takeStoredValueForKey).
But, I expected a null value. What's the problem?
Webobjects 5.2.4
MacOS X Tiger (I have the same behavior on X.3).
Frédéric _______________________________________________
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Practical WebObjects - a book for intermediate WebObjects developers
who want to increase their overall knowledge of WebObjects, or those
who are trying to solve specific application development problems.
http://www.global-village.net/products/practical_webobjects
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