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POcoredata relationship is set nil automatically
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  1. POcoredata relationship is set nil automatically
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    copied!<p>I have two entities. (Deal, Customer) Deal and Customer have 1:1 relationship. so Deal has customer, and Customer has deal.</p> <p>first, I made Customer object named "John". second, I made Deal object and set customer with "John" (#1 deal) third, I made another Deal object and set customer with "John" (#2 deal)</p> <p>at that time, I found some problem. that is #1 deal's customer set nil automatically, and #2 deal's customer is "John".</p> <p>how can I solve that?</p> <p>ps1. I got the data from web server as JSON like this deals = [id: .., ..., customer: { ... }]</p> <p>ps2. I update objects whenever receive data from server.</p> <pre><code>+ (Deal *)dealWithDealsDictionary:(NSDictionary *)dic inManagedObjectContext:(NSManagedObjectContext *)context { Deal *deal = nil; NSFetchRequest *request = [NSFetchRequest fetchRequestWithEntityName:@"Deal"]; request.predicate = [NSPredicate predicateWithFormat:@"deal_id = %@", [dic[@"id"] description]]; // Execute the fetch NSError *error = nil; NSArray *matches = [context executeFetchRequest:request error:&amp;error]; // Check what happened in the fetch if (!matches || ([matches count] &gt; 1)) { // nil means fetch failed; more than one impossible (unique!) deal = [matches lastObject]; // handle error } else if (![matches count]) { deal = [NSEntityDescription insertNewObjectForEntityForName:@"Deal" inManagedObjectContext:context]; } else { deal = [matches lastObject]; } deal.deal_id = [dic[@"id"] description]; deal.deal_status = [dic[@"deal_status"] description]; deal.deal_stage = [dic[@"deal_stage"] description]; deal.deal_desc = [dic[@"deal_desc"] description]; deal.localized_deal_status = [dic[@"localized_deal_status"] description]; deal.localized_deal_stage = [dic[@"localized_deal_stage"] description]; if (dic[@"customer"]) { [context performBlock:^{ deal.customer = [Customer customerWithDictionary:dic[@"customer"] inManagedObjectContext:context]; }]; } return deal; } </code></pre>
 

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