How to convert object to JSON when object have inner object

Question

I have custom class object that contains user object in it:

@interface Order : NSObject

@property (nonatomic, retain) NSString *OrderId;
@property (nonatomic, retain) NSString *Title;
@property (nonatomic, retain) NSString *Weight;
@property (nonatomic, retain) User *User
- (NSMutableDictionary *)toNSDictionary;
...
- (NSMutableDictionary *)toNSDictionary
{

    NSMutableDictionary *dictionary = [[NSMutableDictionary alloc] init];
    [dictionary setValue:self.OrderId forKey:@"OrderId"];
    [dictionary setValue:self.Title forKey:@"Title"];
    [dictionary setValue:self.Weight forKey:@"Weight"];

    return dictionary;
}

In toNSDictinary function I didn't mapped User object.
What is a good way to convert object to nsdictionary in situation like this?

Answer 1

Modify your toNSDictionary method:

- (NSMutableDictionary *)toNSDictionary
{

    NSMutableDictionary *dictionary = [[NSMutableDictionary alloc] init];
    [dictionary setValue:self.OrderId forKey:@"OrderId"];
    [dictionary setValue:self.Title forKey:@"Title"];
    [dictionary setValue:self.Weight forKey:@"Weight"];

    NSMutableDictionary *userDictionary = [NSMutableDictionary dictionary];
    [userDictionary setValue:self.User.someProperty1 forKey:@"someProperty1"];
    [userDictionary setValue:self.User.someProperty2 forKey:@"someProperty2"];
    [dictionary setValue:userDictionary forKey:@"User"];

    return dictionary;
}