Re: Fetching Relation Empty
Re: Fetching Relation Empty
- Subject: Re: Fetching Relation Empty
- From: "Oliver Egger" <email@hidden>
- Date: Tue, 25 Sep 2007 09:42:53 +0200
Hi Daniele
I just can post an example of the InSubQueryQualifier, but this code
is very old, i'm not sure
if the current version of the InSubQueryQualifier of Bernards source
needs the same steps:
in Application.java during startup:
// need by http://lists.apple.com/archives/webobjects-dev/2005/Apr/msg00357.html
EOQualifierSQLGeneration.Support.setSupportForClass(new
InSubqueryQualifierSupport(), InSubqueryQualifier.class);
then the qualifier example.
// ... id in (select doctorFID from vispriority where product=$product)
EOKeyValueQualifier qualProduct = new EOKeyValueQualifier("product",
EOQualifier.QualifierOperatorEqual,product);
InSubqueryQualifier qualifier = new InSubqueryQualifier("id",
"VisPriority", "doctorFID", qual);
hope that gives you a starting point ...
oliver
On 9/24/07, Chuck Hill <email@hidden> wrote:
>
> On Sep 24, 2007, at 5:42 AM, Daniele Corti wrote:
>
> >
> >
> > 2007/9/21, Chuck Hill <email@hidden>: See Pierre
> > Bernards excellent "Qualifiers Additions" at http://
> > www.bernard-web.com/pierre/webobjects/code.html
> >
> > I think the ExistsInRelationshipQualifier is the one you want for
> > this.
> >
> > Thank you Chuck! Do you know if there are some Examples for the use
> > of these Qualifiers?
>
> No, just the JavaDocs.
>
> Chuck
>
>
>
> > On Sep 20, 2007, at 5:57 AM, Daniele Corti wrote:
> >
> > > Hi all,
> > > I was looking for a way to fetch an object that have empty
> > > relations using EOQualifiers
> > >
> > >
> > > I used this qualifier:
> > >
> > > keyValueQualifier = new EOKeyValueQualifier("activations",
> > > EOQualifier.QualifierOperatorEqual , EOEnterpriseObject.NullValue);
> > >
> > > but it doesn't seem to work. activations is a toMany relation of
> > > the fetched object
> > >
> > > --
> > > Daniele Corti
> > > AIM: S0CR4TE5
> > > Messenger: email@hidden
> > >
> > > --
> > > Computers are like air conditioners -- they stop working properly
> > > if you open
> > > WINDOWS
> > >
> > > --
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> > > "advertising", "can't log in", "power switch" and "what backup?"
> > > --Alistair Young
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> >
> >
> >
> >
> > --
> > Daniele Corti
> > AIM: S0CR4TE5
> > Messenger: email@hidden
> >
> > --
> > Computers are like air conditioners -- they stop working properly
> > if you open
> > WINDOWS
> >
> > --
> > What about the four lusers of the apocalypse? I nominate:
> > "advertising", "can't log in", "power switch" and "what backup?"
> > --Alistair Young
>
> --
>
> 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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--
oliver egger
neu seit 17.9.2007: bertastrasse 4, 8003 zürich
http://www.egger-loser.ch
mobile +41765795005
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