Re: EOQualifier to qualify NSTimestamp by month
Re: EOQualifier to qualify NSTimestamp by month
- Subject: Re: EOQualifier to qualify NSTimestamp by month
- From: Joe Kramer <email@hidden>
- Date: Tue, 1 Jun 2010 16:18:23 -0700
Hi Chuck,
Thanks for the response. Generally I avoid "non trivial" things as much as possible because I'm lazy...oops... I mean keenly focused on efficiency (that sounds better). But I think in this case the SQL approach may be worth it. In looking at the EOSQLQualifier docs I see that it is deprecated. It looks like using EOFetchSpecification.setHints() should do the trick in this case. Thanks for weighing in!
Regards,
Joe
On Tue, Jun 1, 2010 at 3:53 PM, Chuck Hill
<email@hidden> wrote:
On Jun 1, 2010, at 3:30 PM, Joe Kramer wrote:
Hi all,
I may be barking up the wrong tree here, but I wanted someone to confirm that for me. I have a simple Person EO with a NSTimestamp attribute for birthdate. I'm wondering if it is possible to create a qualifier to get all the people whose birthday is in a particular month (May, for example). The year doesn't matter so I can't do a simple ">" or "<". If this isn't possible (or efficient) I can change the data model to capture the birth month separately. Then I can just set the month programatically when a new person is created and use that value as the qualifier. Just curious what others think.
select extract(MONTH from col_name) from table_name;
So you could write a custom qualifier to do this. Generally, writing qualifiers ranks as "non trivial". I don't know of an existing qualifier that you can use. Depending on your needs, SQL might be the way to go. See EOSQLQualifier JavaDocs.
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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