How to predicate the nested objects ios

Question

I am trying to predicate the nested objects value here is a structure of nested objects.

@interface APContact : NSObject
@property (nullable, nonatomic, strong) NSArray <APPhone *> *phones;
@end

@interface APPhone : NSObject
@property (nullable, nonatomic, strong) NSString *number;
@end

I am trying to predicate like this as show in below block of code. I want to predicate the number string. how to do this

for (APContact *contact in duplucateDataArray) {
    NSMutableArray *countArray = [[NSMutableArray alloc] init];
    NSPredicate *morningAttendees  = [NSPredicate predicateWithFormat:@"SELF.%K.%K MATCHES %@",@"phones[0]",@"number", contact.phones[0].number];
    NSArray <APContact*> *predicateContact = [duplucateDataArray filteredArrayUsingPredicate:morningAttendees];
    NSLog(@"predicate contact%@",predicateContact);
}

On running above code getting below exception

*** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<APContact 0x2824da6d0> valueForUndefinedKey:]: this class is not key value coding-compliant for the key phones[0].'

 Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Can't do regex matching on object (
    "+91 88815 12534"
).

Any suggestions would be more appreciated.

guru · Accepted Answer · 2019-06-13 09:58:36Z

1

Remove phones[0] as error says you can not use phones[0] APContact has the key phones.

Use below line -

 NSPredicate *morningAttendees  = [NSPredicate predicateWithFormat:@"SELF.%K.%K MATCHES %@",@"phones",@"number", contact.phones[0].number];

answered Jun 13, 2019 at 9:58

guru

2,8173 gold badges29 silver badges41 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

zack Over a year ago

This give me error

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Can't do regex matching on object (     "+1 (888) 123-1725" ).'

Perversio · Accepted Answer · 2019-06-14 10:19:43Z

0

Replace MATCHES with LIKE.

MATCHES assumes your argument is a regex, LIKE assumes your argument is string with wildcard symbols. source

Also, when using nested predicates use ANY, SOME or ALL operators.

NSPredicate *morningAttendees  = [NSPredicate predicateWithFormat:@"ANY phones.number LIKE %@",contact.phones[0].number];

answered Jun 14, 2019 at 10:19

Perversio

466 bronze badges

Collectives™ on Stack Overflow

How to predicate the nested objects ios

2 Answers 2

1 Comment

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Related