On Jul 21, 2009, at 12:56 AM, Francesco Romano wrote:
Hi..
This is a simple (and maybe stupid) question.
No. :-)
I'm doing an application (an e-commerce application.. maybe wo is
not the best choice, but I know java better than ruby..), and I've
some pages accessed with directaction.
Maybe I'm wrong, but I can pass values to a page only with the url,
so.. only strings.
In a page I select an EntityObject and I've to pass to the other page.
If I can't pass the whole object, I would like to pass the primary
key, so fetching should be faster..
But.. I can get the key, but I can't fetch an Object with it's PK.
Yes, you can. See the EOUtilities class in the EOAccess package:
http://developer.apple.com/documentation/MacOSXServer/Reference/WO54_Reference/com/webobjects/eoaccess/EOUtilities.html#faultWithPrimaryKeyValue(com.webobjects.eocontrol.EOEditingContext,%20java.lang.String,%20java.lang.Object)
public static EOEnterpriseObject
faultWithPrimaryKeyValue(EOEditingContext ec, String entityName,
Object value)
Fetches the Enterprise Object identified by the specified primary key
value
Now i pass a name (a description string..).. but it's not unique, so
even with low probability, there can be collisions..
What can I do?
If the PK is the only unique value, you have to use it or create some
other unique value.
Chuck
--
Chuck Hill Senior Consultant / VP Development
Learn WO at WOWODC'09 East in Montréal this August!
http://www.wocommunity.org/wowodc09/east
http://arstechnica.com/apple/news/2009/07/webobjects-sliced-from-106but-prognosis-of-death-premature.ars
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