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POJSON to Core Data SQLITE Error
primarykey
Id
18222407
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AcceptedAnswerId
18236954
AnswerCount
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ClosedDate
CommentCount
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CreationDate
2013-08-14T02:46:43.707
FavoriteCount
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2013-08-14T20:16:15.537
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2013-08-14T20:16:15.537
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2512523
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Body
<p>Can anyone help figure out what i've done wrong within this code? trying to populate core data structure through JSON file</p> <pre><code>// Create the managed object context NSManagedObjectContext *context = managedObjectContext(); // Save the managed object context NSError *error = nil; if (![context save:&error]) { NSLog(@"Error while saving %@", ([error localizedDescription] != nil) ? [error localizedDescription] : @"Unknown Error"); exit(1); } NSError* err = nil; NSString* dataPath = [[NSBundle mainBundle] pathForResource:@"Exercises" ofType:@"json"]; NSArray* Exercises = [NSJSONSerialization JSONObjectWithData:[NSData dataWithContentsOfFile:dataPath] options:kNilOptions error:&err]; //NSLog(@"Imported Exercises: %@", Exercises); NSManagedObject *object = [NSEntityDescription insertNewObjectForEntityForName:@"Exercise" inManagedObjectContext:context]; NSString *theJSONString = @"{\"key\":\"value\"}"; NSError *theError = NULL; NSDictionary *jsonDict = [NSDictionary dictionaryWithJSONString:theJSONString error:&theError]; Exercise *exercise = [NSEntityDescription insertNewObjectForEntityForName:@"Exercise" inManagedObjectContext:context]; [Exercises enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) { NSDictionary *attributes = [[object entity] attributesByName]; for (NSString *attribute in attributes) { id value = [jsonDict objectForKey:attribute]; if (value == nil) { continue; } [exercise setValue:value forKey:attribute]; } NSError *error; if (![context save:&error]) { NSLog(@"Whoops, couldn't save: %@", [error localizedDescription]); } }]; </code></pre> <p>Edited: Code now compiles but i get null values in the core data model. Thanks</p>
Tags
<ios><json><sqlite><core-data>
Title
JSON to Core Data SQLITE Error
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PostAcceptedAnswerId
1. PO
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  PostTypePostTypeId
  PTAnswer
PostParentId
1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
UserLastEditorUserId
1. USuser2512523
UserOwnerUserId
1. USuser2512523
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PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. PO
  singulars
  PostTypePostTypeId
  PTAnswer
VotesPostIdCreationDate
1. This table or related slice is empty.
CommentsPostId
1. COIn this code you're actually not saving anything. The save calls will do nothing. Where is the Entity subclass to feed the value of your JSON data ?
  singulars
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  POJSON to Core Data SQLITE Error
  UserUserId
  USCodenameLambda1

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