schemas/schema.h
#import <Realm/Realm.h>
@class Parent;
@interface Child : RLMObject
@property BOOL likes_math;
@property NSInteger favourite_number;
@property NSString *name;
@property NSString *sex;
@property NSDate *birthday;
@property Parent *mother;
@property Parent *father;
@end
RLM_ARRAY_TYPE(Child)
@interface Parent : RLMObject
@property NSString *job;
@property NSString *name;
@property NSString *sex;
@property NSDate *birthday;
@property BOOL likes_ruby;
@property NSInteger apps_in_appstore;
@property RLMArray<Child *> <Child> *children;
@end