• Open Menu Close Menu
  • Apple
  • Shopping Bag
  • Apple
  • Mac
  • iPad
  • iPhone
  • Watch
  • TV
  • Music
  • Support
  • Search apple.com
  • Shopping Bag

Lists

Open Menu Close Menu
  • Terms and Conditions
  • Lists hosted on this site
  • Email the Postmaster
  • Tips for posting to public mailing lists
Linking to derived columns in EO Models
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Linking to derived columns in EO Models


  • Subject: Linking to derived columns in EO Models
  • From: Ray Ackland <email@hidden>
  • Date: Thu, 17 Jul 2003 21:33:57 +1200

Is there a way of having derived columns at the end of a link?

I am trying to devise a (probably common) method of letting people select from categories - in this case they
a) select the main grouping (eg 200), which gives them a list of choices (210, 220, 230...)
b) select from the next group (eg 220) which gives them further choices (221, 224, 225...)
c) select the final candidate from this list.


I was attempting to do it by having a derived column (levelOneCode = code / 100... etc) which links back to the same table to look up the description of the main group. Conversely, you select a main group and the records linked to it are shown. But when I do this, I am unable to use this column as a foreign key.

Any suggestions?

Ray.
_______________________________________________
webobjects-dev mailing list | email@hidden
Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/webobjects-dev
Do not post admin requests to the list. They will be ignored.

  • Prev by Date: Re: WOFileUpload docs?
  • Next by Date: Can't modify EO objects! ARGH! =(
  • Previous by thread: Re: WOFileUpload docs?
  • Next by thread: Can't modify EO objects! ARGH! =(
  • Index(es):
    • Date
    • Thread