Mailing Lists: Apple Mailing Lists

Image of Mac OS face in stamp
 
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Primary Key Maximum value




On Mar 20, 2007, at 11:17 AM, Miguel Arroz wrote:

Hi!

  I'm in the state of panic here...

I have modeled my DB using 8 byte primary key values. Apparently PostgreSQL takes this fine.

Today, I needed some code to obtain a primary key, and used the code at <http://en.wikibooks.org/wiki/Programming:WebObjects/EOF/ Using_EOF/Primary_Keys>.

I started suspecting that it would not work, because it checks for an Integer, and the key should be a Long value. The problem is that... it worked!

What does this mean? WO only supports 4 byte primary keys? That's not good at all... please tell me I'm going crazy for no reason and there's something tremendously obvious that I have missed.

  Yours

Miguel Arroz


It is probably working because the cast of the pk is losing data, but the pk is still unique. But it also sounds as though you already know not to rely on this behavior.


I had not looked at the wikibook documentation you refer to. For what you are trying to do, you may want to look at the databaseContextNewPrimaryKey method in the EODatabaseContext.Delegate class.

- ray

_______________________________________________
Do not post admin requests to the list. They will be ignored.
Webobjects-dev mailing list      (email@hidden)
Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/webobjects-dev/email@hidden

This email sent to email@hidden
References: 
 >Primary Key Maximum value (From: Miguel Arroz <email@hidden>)



Visit the Apple Store online or at retail locations.
1-800-MY-APPLE

Contact Apple | Terms of Use | Privacy Policy

Copyright © 2007 Apple Inc. All rights reserved.