Re: WO NewBie
Re: WO NewBie
- Subject: Re: WO NewBie
- From: LD <email@hidden>
- Date: Tue, 1 Feb 2005 11:03:44 +1100
Hi there,
do follow Zak's suggestion...
You might also like to look at...
http://developer.apple.com/documentation/WebObjects/
http://developer.apple.com/documentation/WebObjects/Enterprise_Objects/
index.html
And various helpful Programming Topics linked from the Legacy Docs
(strangely not from the current docs):
http://developer.apple.com/documentation/LegacyTechnologies/WebObjects/
WebObjects_5/Topics/TopicsTOC.html
an example [fetch] code is greatly appriciated...
So, I assume that you've made Attribute myID the primary key (Key
Symbol in EOModeler) and is also available as a class attribute
(Diamond symbol). Your myValue attribute will just have the diamond.
Then you've exported the java class.
Fetching the values is really going to depend on how else you're
dealing with the fetched object(s) (i.e., rows) if at all. Can the user
see a list of available keys, for example? If yes, then it'll make more
sense to do in-memory filtering (see first link above) on the objects
you have already fetched. If no, raw row fetching could make better
sense (see both links). etc etc You'll need to decide how you are using
the data, whether the user can edit the objects etc.
After you've gone through the tutorial Zak mentioned (make sure you
understand the concepts there), then the below may make more sense...
Example (without exception handling, action methods, etc) snippets...
pkey = new Integer(userInputKey);
// in-memory filter example snippet
kvq = new EOKeyValueQualifier("myID",
EOQualifier.QualifierOperatorEqual, pkey);
filteredArray = EOQualifier.filteredArrayWithQualifier(fetchedEntities,
kvq);
if (...) {
selectedEntity = filteredArray.objectAtIndex(0);
}
// _or_
// EOUtilities fetch example snippet
selectedEntity = (T_TEST)EOUtilities.objectWithPrimaryKeyValue(ec,
"T_TEST", pkey);
HTH somewhat...
with regards,
--
Lachlan Deck
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