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core data, boolean attribute, and dynamic
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core data, boolean attribute, and dynamic


  • Subject: core data, boolean attribute, and dynamic
  • From: Martin Hewitson <email@hidden>
  • Date: Fri, 12 Aug 2011 13:08:50 +0200

Dear list,

In an app I have a core data model which has a File entity which has a boolean attribute isText. This attribute is declared in the corresponding NSManagedObject subclass interface as

@property (assign) BOOL isText;

and in the implementation I do

@dynamic isText;

In Lion, accessing this with

[file isText]

works fine. But it doesn't work on Snow Leopard. There I have to do

[[file valueForKey:@"isText"] boolValue]

Is this expected behaviour? Was/is something broken on SL that was fixed on Lion? Or is it now broken on Lion?

While the fix is easier, I'd like to understand what is wrong with [file isText] on SL.

Any insights or upgrades to my understanding, gratefully received.

Martin

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Martin Hewitson
Albert-Einstein-Institut
Max-Planck-Institut fuer
    Gravitationsphysik und Universitaet Hannover
Callinstr. 38, 30167 Hannover, Germany
Tel: +49-511-762-17121, Fax: +49-511-762-5861
E-Mail: email@hidden
WWW: http://www.aei.mpg.de/~hewitson
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~





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