Question

I am using core data, so all my numbers are NSNumbers (since it’s an old model I did not use scalar automatic conversion which seems to be available for the new core data).

So my code is full with these conversion statements:

[myNSNumberFromCoreDataObject intValue]   which is pretty annoying...

Is there any convenient solution for this or am I trapped now, since I could not use scalar core data modelling?

Edit:
Ideally one could write some sort of preprocessor statement that checks these cases and automatically just substitutes this automatically – is this possible somehow?

Answer 1

You can always declare the properties on your managed objects as scalars and handle the conversion in getters/setters. Example:

Header

@interface MyEntity : NSManagedObject

@property (nonatomic, assign, readwrite) NSUInteger count;

@end

Implementation

@interface MyEntity ()

@property (nonatomic, retain, readwrite) NSNumber* dbCount;

@end

@implementation MyEntity

@dynamic dbCount;

- (void)setCount:(NSUInteger)count {
    self.dbCount = [NSNumber numberWithUnsignedInteger:count];
}

- (NSUInteger)count {
    return [self.dbCount unsignedIntegerValue];
}

@end