FYI, prototypes of derived columns don't exactly work in EntityModeler. So you need to write the derived prototype config on a piece of paper and recreate those derived attributes from your notes on that piece of paper instead ;-)
http://issues.objectstyle.org/jira/browse/WOL-1153 On Jun 1, 2010, at 7:35 PM, Chuck Hill wrote: > Now there is a bit of smart thinking! Make it a prototype and you retain > some measure of database independence. > > Chuck > > > On Jun 1, 2010, at 4:20 PM, Johnny Miller wrote: > >> Could he follow your advice, about using SQL, and create a derived column in >> his model and then use a standard qualifier against the derived column? >> >> On Jun 1, 2010, at 12:53 PM, Chuck Hill 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. >>> >>> >>> Define "possible". :-P The SQL way is >>> >>> 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 >>> >>> >>> >>> >>> >>> >>> >>> _______________________________________________ >>> Do not post admin requests to the list. They will be ignored. >>> Webobjects-dev mailing list ([email protected]) >>> Help/Unsubscribe/Update your Subscription: >>> http://lists.apple.com/mailman/options/webobjects-dev/jlmiller%40kahalawai.com >>> >>> This email sent to [email protected] >> >> Johnny Miller >> Kahalawai Media Corp >> http://www.kahalawai.com >> >> >> > > -- > 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 > > > > > > > > _______________________________________________ > Do not post admin requests to the list. They will be ignored. > Webobjects-dev mailing list ([email protected]) > Help/Unsubscribe/Update your Subscription: > http://lists.apple.com/mailman/options/webobjects-dev/kieran_lists%40mac.com > > This email sent to [email protected] _______________________________________________ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list ([email protected]) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to [email protected]
