CODEWITHSUNDEEP
iosobjective-crealm
ChokWah
ChokWah

Reputation: 105

Realm Objective‑C How to ignore when written to the database already exists the same primary key?

I get data List from Server. They are array of books. I have RLMObjects of books, book, person.

@class Person, Book;
@interface Person : RLMObject

@property (nonatomic, strong) NSString *name;
@property (nonatomic, assign) int age;
@property (nonatomic, assign) NSInteger id;
@end
RLM_ARRAY_TYPE(Person)


@interface Book : RLMObject

@property (nonatomic, strong) Person *author;
@property (nonatomic, strong) NSString *price;
@property (nonatomic, strong) RLMArray<Person> *translators;
@end
RLM_ARRAY_TYPE(Book)


@interface Books : RLMObject

@property (nonatomic, assign) NSInteger count;
@property (nonatomic, strong) NSString *year;
@property (nonatomic, strong) RLMArray<Book> *books;
@end

@implementation Person

+ (NSString *)primaryKey {
    return @"id";
}

@end

When I get array of books, turn them from dictionary to the Books object. Then add it into realm.

[[RLMRealm defaultRealm] transactionWithBlock:^{
        [[RLMRealm defaultRealm] addObject:[Books mj_objectWithKeyValues:responseObject]];
    } error:nil];

It crashed.Because there're two books which had same translators. Can't set primary key property 'id' to existing value '1314331'.

So, like this situation, how to put data into RLMRealm and keep every person object is the only one by primaryKey?

Upvotes: 0

Views: 280

Answers (1)

Anoop Rawat
Anoop Rawat

Reputation: 357

Try this

[[RLMRealm defaultRealm] transactionWithBlock:^{
    RLMObject *object = [Books mj_objectWithKeyValues:responseObject];
    [[RLMRealm defaultRealm] addOrUpdateObject:object];
} error:nil];

Upvotes: 1

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