• Open Menu Close Menu
  • Apple
  • Shopping Bag
  • Apple
  • Mac
  • iPad
  • iPhone
  • Watch
  • TV
  • Music
  • Support
  • Search apple.com
  • Shopping Bag

Lists

Open Menu Close Menu
  • Terms and Conditions
  • Lists hosted on this site
  • Email the Postmaster
  • Tips for posting to public mailing lists
Re: horizontal inheritance oddity
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: horizontal inheritance oddity


  • Subject: Re: horizontal inheritance oddity
  • From: Chuck Hill <email@hidden>
  • Date: Wed, 24 May 2006 15:37:14 -0700


On May 23, 2006, at 7:45 PM, Mike Schrag wrote:

I have a model in a framework that defines Entity A and a model in my project that depends on that framework that defines Entity B as subclass of Entity A via Horizontal Inheritance. Entity A is abstract (though the same problem occurs either way). When I run my app, and create new Entity B's, the insert statements don't include the primary key (resulting in an integrity constraint violation). If i edit the model and simply remove the parent entity reference from Entity B, and restart, everything works perfectly. That fix is ACTUALLY is not that big of a deal from a runtime perspective, except that I need the parent reference for EOGenerator to work properly (basically I care more about the inherited methods than I particularly care about it actually having a relationship in the model). Anyone seen this one before? It's been driving me crazy today -- I have to believe I'm just overlooking something silly.


Are there any entities with a relationship to the parent that have the relationship marked as Propogate Primary Key? If have seen this cause the primary key to not get generated even the objects in question were created but not related. I have been bitten by that recently, and it was very hard to track down.

Another possibility is that something in the parent entitie's PK definition is different and causing EOF to think that it can't / shouldn't generate the PK.

Chuck

--
Coming in 2006 - an introduction to web applications using WebObjects and Xcode http://www.global-village.net/wointro


Practical WebObjects - for developers who want to increase their overall knowledge of WebObjects or who are trying to solve specific problems. http://www.global-village.net/products/practical_webobjects




_______________________________________________ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (email@hidden) Help/Unsubscribe/Update your Subscription: This email sent to email@hidden
  • Follow-Ups:
    • Re: horizontal inheritance oddity
      • From: Francis Labrie <email@hidden>
    • Re: horizontal inheritance oddity
      • From: Mike Schrag <email@hidden>
References: 
 >horizontal inheritance oddity (From: Mike Schrag <email@hidden>)

  • Prev by Date: Re: Another take on a NY WebObjects Users Group
  • Next by Date: Re: Alternative to Cookie during a Session Timeout
  • Previous by thread: Re: horizontal inheritance oddity
  • Next by thread: Re: horizontal inheritance oddity
  • Index(es):
    • Date
    • Thread