how to set Custom attribute of NSManagedObject which is calculated from other attributes ?
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Published on 2010-04-30T16:17:35Z
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2010/04/30
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I am using core data framework to manage objects.i have an entity which has several attributes of decimal types. Among them is attribute which is mathematically calculated from other attributes. Ex :-
@interface Marks : NSManagedObject
{
}
@property (nonatomic, retain) NSDecimalNumber * answerGradeA;
@property (nonatomic, retain) NSDecimalNumber * answerGradeB;
@property (nonatomic, retain) NSDecimalNumber * answerGradeC;
@property (nonatomic, retain) NSDecimalNumber * total;
Here i want attribute total = 3xanswerGradeA + 2xanswerGradeB + 1xanswerGradeC
if it is possible to do like this, then how ? please reply. Thanks in advance.
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