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Re: Modeling an optional to-one relationship
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Re: Modeling an optional to-one relationship


  • Subject: Re: Modeling an optional to-one relationship
  • From: Chuck Hill <email@hidden>
  • Date: Fri, 15 Jan 2010 11:04:15 -0800


On Jan 15, 2010, at 9:44 AM, Mark Ritchie wrote:

Hi Lon,

On 14/Jan/2010, at 2:21 PM, Lon Varscsak wrote:
heh, it's not. :)  I also don't believe that sometimes having an
optional to-one is always a "thing to fix".  However, I do understand
now that EOF doesn't handle this case much better than it did in WO4.

Personally, I like the way that EOF is handling the case. It works for reading and it correctly warns you when you attempt to change something that never existed in the first place. There is also programatic access to detect the case

How are you doing this? Is it much different than the code I sent a few minutes ago?


Chuck


before you attempt to saveChanges so you can gracefully handle things before hitting a exception. However, each to their own! ;-)

Here's the example code which I was working with:
<Application.java>

Setup a new project with a copy of the Movies.eomodeld, change all entity classes to EOGenericRecord, setup a database with the tables and point the connection dictionary at it. It should be good to go. Oh, you should also set the WOAutoOpenInBrowser false since there's no point in opening the default main component.

Please let me know how this works for you!
Mark

-- Chuck Hill Senior Consultant / VP Development

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








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  • Follow-Ups:
    • Re: Modeling an optional to-one relationship
      • From: Mark Ritchie <email@hidden>
References: 
 >Modeling an optional to-one relationship (From: Lon Varscsak <email@hidden>)
 >Re: Modeling an optional to-one relationship (From: Travis Britt <email@hidden>)
 >Re: Modeling an optional to-one relationship (From: Lon Varscsak <email@hidden>)
 >Re: Modeling an optional to-one relationship (From: Chuck Hill <email@hidden>)
 >Re: Modeling an optional to-one relationship (From: Lon Varscsak <email@hidden>)
 >Re: Modeling an optional to-one relationship (From: Tom M.Blenko <email@hidden>)
 >Re: Modeling an optional to-one relationship (From: Mark Ritchie <email@hidden>)
 >Re: Modeling an optional to-one relationship (From: Lon Varscsak <email@hidden>)
 >Re: Modeling an optional to-one relationship (From: Mark Ritchie <email@hidden>)

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