objectFromDictionary and objectFromJSON does not handle the relationships

[devKrishnan]

I have a set of NSManagedObjects which are related to each other.

When I tried converting the JSON to NSManagedObject the application crashed because it could not handle the plain NSDictionary inside the NSSet. The library was expecting an NSManagedObject.

Line:

[instance setValue:objValue forKey:key];

Method:

• (BOOL)assignValue:(id)value instance:(id)instance key:(NSString )key propertyClass:(Class)propertyClass error:(NSError *)error

File Name:

AZReflection.m

[alexandreos]

Hi,

In order to support complex collections, you have to provide a mapping for the attribute, something like:

@interface YourClass : NSManagedObject

@property (nonatomic) NSSet *childSet;

@end

@implementation YourClass

+ (NSDictionary *)reflectionMapping
{
    return @{@"some_json_array_key" : @"childSet,<ChildClass>"};
}

@end

Can you please post the code from your class?

Thanks

[superarts]

Thanks Alexandreos, however in your example, isn't @property (nonatomic) NSSet *childSet; supposed to be @property (nonatomic) ChildClass *childSet;? Anyway it works for me perfectly.