Hi, all! I'm posting this question here because this list keeps coming up
when I search for information on things I'm working on, so I figure if
anyone can figure this out, it'll be here.
I'm trying to add an NSRuleEditor-like interface to my app, but I'm rolling
my own because I gave up on figuring out the official one. :) It's not that
big a task, anyway, so I'm fine with that...
I have Core Data entities Condition (abstract), CompoundCondition, and
KnowledgeCondition, each with their own custom classes. Weirdly, I get an
error only when attempting to add a third child to an existing item - I can
delete and add children one and two as much as I want without triggering the
problem, and if I (somehow - I can't reproduce it) get past that, I can
continue to delete and add then as well. It's only at the transition from
two to three that's the problem.
Anyway, the error looks like:
*2008-04-13 22:27:25.180 Dialogue[56287:10b] *** -[NSCFArray member:]:
unrecognized selector sent to instance 0x10e65f0*
*2008-04-13 22:27:25.181 Dialogue[56287:10b] *** -[NSCFArray member:]:
unrecognized selector sent to instance 0x10e65f0*
Well, yeah - it can't find the selector because it's not a set, it's an
array. But this is baffling, because I requested it with
mutableSetValueForKey! Doing po on the address gives me:
<NSCFArray 0x1229830>(
<KnowledgeCondition: 0x126f790> (entity: KnowledgeCondition; id: 0x10ff2a0
<x-coredata:///KnowledgeCondition/t93FFC617-086F-4DFB-9EC8-3A390E2F79A77> ;
data: {
character = nil;
index = 0;
knowledge = nil;
mode = 1;
parent = 0x10cf080
<x-coredata:///CompoundCondition/t93FFC617-086F-4DFB-9EC8-3A390E2F79A76>;
trigger = nil;
}),
<KnowledgeCondition: 0x10dba60> (entity: KnowledgeCondition; id: 0x10df1c0
<x-coredata:///KnowledgeCondition/t93FFC617-086F-4DFB-9EC8-3A390E2F79A78> ;
data: {
character = nil;
index = 5;
knowledge = nil;
mode = 1;
parent = 0x10cf080
<x-coredata:///CompoundCondition/t93FFC617-086F-4DFB-9EC8-3A390E2F79A76>;
trigger = nil;
})
)
Which, indeed, looks like a valid representation of my data - except for
some reason as an array rather than a set.
Does anybody have any idea how I can debug this?
By the way, this problem is similar to one described a couple years ago, but
there was no resolution in that thread. I'm hoping that means it was
something simple and silly!
http://www.cocoabuilder.com/archive/message/cocoa/2006/1/20/154873
--
Dan Knapp
"An infallible method of conciliating a tiger is to allow oneself to be
devoured." (Konrad Adenauer)
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