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Re: opposite method to objectMatchingKeyAndValue
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Re: opposite method to objectMatchingKeyAndValue


  • Subject: Re: opposite method to objectMatchingKeyAndValue
  • From: Chuck Hill <email@hidden>
  • Date: Sat, 21 Feb 2009 16:20:21 -0800


On Feb 21, 2009, at 3:46 PM, Paul Hoadley wrote:

On 22/02/2009, at 1:52 AM, Mike Schrag wrote:

I see a thread from 2003 [1] that seems to indicate that uniqueness of an attribute isn't expressible in an EO model. I take it the only way to add such a constraint, then, is manually?

AFAIK: yes.

However, it *might* be possible to enhance EntityModeler to include this info in the EOModel, and thereby to generate SQL that does this for you... It would not be information present at runtime, in the programatic rep of the model, which could be a source of confusion, but it might be a convenient feature nevertheless. And who knows, maybe Apple would pick up on it and include this info in the EOModel standard... Any thoughts on this from WOProject folks?
5.4 added this, and Entity Modeler already supports it ... It depends on your plugin as to whether or not SQL will be generated for it, and I don't think migrations look at that (because the API isn't available in 5.3).

AFAICS, PostgresqlPlugIn doesn't support this---can anyone confirm? (That is, I've created an entityIndex in my model, and there doesn't seem to be any new SQL as a result. But I could be doing it wrong.)


IIRC, EOF does not even support this. The ground work is laid, but it is not quite cooked yet. Maybe in 5.5?

Chuck

--
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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References: 
 >opposite method to objectMatchingKeyAndValue (From: Gustavo Pizano <email@hidden>)
 >Re: opposite method to objectMatchingKeyAndValue (From: Alan Ward <email@hidden>)
 >Re: opposite method to objectMatchingKeyAndValue (From: Paul Hoadley <email@hidden>)
 >Re: opposite method to objectMatchingKeyAndValue (From: Stamenkovic Florijan <email@hidden>)
 >Re: opposite method to objectMatchingKeyAndValue (From: Mike Schrag <email@hidden>)
 >Re: opposite method to objectMatchingKeyAndValue (From: Paul Hoadley <email@hidden>)

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