Re: Auto-Selection of an object in a PopUp Button
Re: Auto-Selection of an object in a PopUp Button
- Subject: Re: Auto-Selection of an object in a PopUp Button
- From: Chuck Hill <email@hidden>
- Date: Tue, 9 Nov 2004 10:57:32 -0800
On Nov 9, 2004, at 7:54 AM, David Griffith wrote:
I have two questions:
Firstly, since I know those country objects were already registered
with the
defaultEditingContext previously, will they be faulted into the other
editingContext automatically by using the fetch spec?
I.e. If previously I had called
new NSMutableArray(ec.objectsWithFetchSpecification(fetchSpec));
And now I call:
New
NSMutableArray(addressContext.objectsWithFetchSpecification(fetchSpec))
;
Will the country objects be faulted into the addressContext because
they are
already registered in the default one?
Sort of. It will make a trip to the database anytime you call
objectsWithFetchSpecifications to determine which objects are affected.
At that point it may decide to use the data it already has cached.
Also, you say 'migrate' the object to the other context. How would
you go
about doing that? I didn't know you could.
See the localInstanceOfObject and localInstancesOfObjects method in
EOUtilities (EOAccess package).
These methods do not result in a trip to the DB (unless the data is
stale, but lets not confuse things yet).
Chuck
--
Practical WebObjects - a book for intermediate WebObjects developers
who want to increase their overall knowledge of WebObjects, or those
who are trying to solve specific application development problems.
http://www.global-village.net/products/practical_webobjects
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