Hi Matteo, It sounds like something is not right in your model. Check that - POI is either abstract or has a qualifier (e.g. qualifier type='P') - the Parent entity of Restaurant and Club is set, check that - the external (table) name of POI, Restaurant and Club is exactly identical
Chuck On 2011-10-07, at 7:55 AM, Matteo Centro wrote: > Hi all, > > kind of a stupid question but in my whole career with WO I never used Single > Table Inheritance so I'm kind of a newbie here... > > I'll try to explain with a small example: I have an entity called > PointOfInterest (POI), defined by the main attributes which are name, > latitude, longitude, type and with a relationship to a City. > I then created two subclasses of POI > Restaurant (with qualifier type='R') and some more attributes > Club (with qualifier type='C') and some different attributes > All is mapped in two tables, one for City and one for POI. Everything looked > fine in my head... > > I find puzzling though that if I ask a City for its POIs I get an array full > of duplicates in this example I'm printing out all the POIs for a City: > POI name: Open POI Class: your.app.logic.Club > POI name: Jazz Club POI Class: your.app.logic.Club > POI name: Dal Baffo POI Class: your.app.logic.Restaurant > POI name: Zushi POI Class: your.app.logic.Restaurant > POI name: Ristorante POI Class: your.app.logic.Restaurant > POI name: Dal Baffo POI Class: your.app.logic.Restaurant > POI name: Zushi POI Class: your.app.logic.Restaurant > POI name: Open POI Class: your.app.logic.Club > POI name: Jazz Club POI Class: your.app.logic.Club > POI name: Generic poi POI Class: your.app.logic.PointOfInterest > POI name: Ristorante POI Class: your.app.logic.Restaurant > > In reality I only have 6 items in my POI table: 3 Restaurants, 2 Clubs and > one row with blank type. So I was expecting of getting something like this: > POI name: Open POI Class: your.app.logic.Club > POI name: Jazz Club POI Class: your.app.logic.Club > POI name: Dal Baffo POI Class: your.app.logic.Restaurant > POI name: Zushi POI Class: your.app.logic.Restaurant > POI name: Ristorante POI Class: your.app.logic.Restaurant > POI name: Generic poi POI Class: your.app.logic.PointOfInterest > > Maybe I'm approaching the problem in the stupidest way but I'd like to > understand a little bit more about what you guys think... > > Thanks, > > > Matteo > > _______________________________________________ > 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/chill%40global-village.net > > This email sent to [email protected] -- 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/archive%40mail-archive.com This email sent to [email protected]
