Core Data relationship to same entity - ios

Question

I have been using archiving and I am switching to Core Data--however, I don't know how to implement a certain entity that I want to add to the database.
Here is how I would have written the header file not using Core Data...
#interface SELCase : NSObject <NSCoding>
#property (nonatomic) NSString *name;
#property (nonatomic) NSString *caseKey;
#property (nonatomic) BOOL individual;
#property (nonatomic) float indivAmount;
#property (nonatomic) SELCase *indivType;
#end
Data that would be loaded every time would be the name, caseKey, and individual. If individual was YES then that would be the end of it, but if it wasn't an individual then indivAmount and indivType would be loaded.
The problem is that I need a relationship to another SELCase and I have no idea how to do that. Any help?

Answer 1

Just create a relationship that points to the same entity.
Here's an example:
#property (nonatomic, retain) NSString * goalName;
#property (nonatomic, retain) NSData * goalPicture;
#property (nonatomic, retain) NSNumber * indexOrder;
#property (nonatomic, retain) NSNumber * wordPicture;
#property (nonatomic, retain) NSSet *item;
#property (nonatomic, retain) Goal *parent;
#property (nonatomic, retain) NSSet *subGoals;
#property (nonatomic, retain) User *user;
#property (nonatomic, retain) NSSet *video;
#property (nonatomic, retain) NSSet *stats;
#end
#interface Goal (CoreDataGeneratedAccessors)
- (void)addItemObject:(Item *)value;
- (void)removeItemObject:(Item *)value;
- (void)addItem:(NSSet *)values;
- (void)removeItem:(NSSet *)values;
- (void)addSubGoalsObject:(Goal *)value;
- (void)removeSubGoalsObject:(Goal *)value;
- (void)addSubGoals:(NSSet *)values;
- (void)removeSubGoals:(NSSet *)values;
- (void)addVideoObject:(Video *)value;
- (void)removeVideoObject:(Video *)value;
- (void)addVideo:(NSSet *)values;
- (void)removeVideo:(NSSet *)values;
- (void)addStatsObject:(Stats *)value;
- (void)removeStatsObject:(Stats *)value;
- (void)addStats:(NSSet *)values;
- (void)removeStats:(NSSet *)values;
In this case, the subGoals is a set consisting of the same type of entity.
In your model you'll just make a relationship (one/one, one/many, whatever) that points to the same entity.