CODEWITHSUNDEEP
iosobjective-c
casillas
casillas

Reputation: 16813

This class is not key value coding-compliant for the key

I am getting the following error. restaurantData.itemArray contains array of ProductData objects and I am trying to filter it with id as follows. I wonder what I am doing wrong in my implementation.

*** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[ valueForUndefinedKey:]: this class is not key value coding-compliant for the key id.'

+ (NSString *)menuItemForItemId:(NSString *)itemId
{
    ProductData *restaurantData = [ProductData restaurantDataInstance];

    NSString *item = @"";

    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"(%K == %@)", kItemId, itemId];
    // the error is thrown in the following line
    NSArray *filteredArray = [restaurantData.itemArray filteredArrayUsingPredicate:predicate];
    if ([filteredArray count] > 0)
        item = [(NSDictionary *)[filteredArray objectAtIndex:0] objectForKey:kItem];

    return item;
}

Here is my ProductData class if it is needed.

ProductData.m

#import "ProductData.h"

#define kTitleKey        @"pName"
#define kPriceKey        @"price"
#define kIdKey           @"id"

@implementation ProductData
@synthesize pId, pImage, pPrice, pName, itemArray;

+(ProductData*) restaurantDataInstance {
    static ProductData *restaurantDataInstance;
    @synchronized(self) {
        if(!restaurantDataInstance){
            restaurantDataInstance = [[ProductData alloc] init];
        }
    }
    return restaurantDataInstance;
}

- (id)init
{
    if (self = [super init]) {
        if (!itemArray || !itemArray.count){
            itemArray = [NSMutableArray arrayWithCapacity:10];
        }
    }
    return self;
}

-(id)initWithDictionary:(NSDictionary *)aDict{
    self = [self init];
    if (self){
        self.pId = [aDict objectForKey:@"id"];
        self.pPrice = [aDict objectForKey:@"price"];
        self.pName = [aDict objectForKey:@"name"];
    }
    return self;
}

Upvotes: 3

Views: 2726

Answers (1)

janusfidel
janusfidel

Reputation: 8106

Your ProductData does not have a property named id, from your sample code I can see that it has pId

The line below tries to access a property named id, which does not exist.

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"(%K == %@)", kItemId, itemId];

Upvotes: 2

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