NSCounted set ignoring a property

Question

I'm trying to do a NSCountedSet but I need to ignore a property, I tried overriding the isEqual method of my object, and doing a manual compare of all the properties except the one I want to ignore but it doesn't work

Any idea on how to achieve it?

UPDATE

My class

@interface GSOrderMenuMenuContent : GSBaseModel

@property (copy, nonatomic) NSNumber        *order_content_id;
@property (copy, nonatomic) NSNumber        *item_id;

@property (copy, nonatomic) NSNumber        *price;
@property (copy, nonatomic) NSNumber        *priceWithModifiers;

@property (copy, nonatomic) NSString        *course;
@property (copy, nonatomic) NSString        *itemName;

@property (nonatomic) GSMenuItem*           item;
@property (nonatomic) NSMutableArray        *modifiers;

@property (copy, nonatomic) NSNumber        *isAlreadyPrinted;

@property (copy,nonatomic)  NSNumber        *isDeleted;

-(GSOrderMenuMenuContent*)deepCopy;

-(GSOrderContent*)  orderContent;

-(BOOL)isEqual:(GSOrderMenuMenuContent*)object;
@end

Usage:

    NSCountedSet* countedSet    = [[NSCountedSet alloc] initWithArray:contents];

Where contents is an array of class objects

Adding a breakpoint to the isEqual gets not called (however it is if doing a [NSarray containsObject:...]

Answer 1

As mentioned in the docs for the isEqual: method, you must always implement a corresponding hash method. Those two methods must always be implemented together.

Two objects that compare as equal must also return the same hash value.