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POImporting multi-Relational Data with magicalpanda's MagicalRecord
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  1. POImporting multi-Relational Data with magicalpanda's MagicalRecord
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    copied!<p>I would like to import a json-file into my SQLite-CoreData-Database with the help of magical panda's MagicalRecord. This is the Content of my json-file: </p> <pre><code>{ "title":"Gebratener Schweinebauch auf dänische Art", "subtitle":"Stegt flaesk med persillesauce", "preparation_time":"35 Min.", "preparation_subtitle":"bei 225°C, nicht vorheizen.", "components":[ { "name":"Hauptgericht", "ingredients": [ { "name":"1 kg geschälte und gekochte Kartoffeln" } ] } ] } </code></pre> <p>i am trying to import the content of the file into the following core-data-model: Image of the Data model: <a href="http://twitpic.com/8fa0y9" rel="nofollow">http://twitpic.com/8fa0y9</a></p> <p>i use the following code to import the json-file: </p> <pre><code>- (void)initializeRecipeDatabase { NSString *resource = [[NSBundle mainBundle] pathForResource:kRecipeInitialDatabaseContentFilename ofType:kRecipeInitialDatabaseContentFileType]; NSError *parsingError = nil; NSDictionary *result = nil; if (NSClassFromString(@"NSJSONSerialization")) { NSInputStream *inputStream = [NSInputStream inputStreamWithFileAtPath:resource]; [inputStream open]; result = [NSJSONSerialization JSONObjectWithStream:inputStream options:0 error:&amp;parsingError]; } else { NSData *jsonData = [NSData dataWithContentsOfFile:resource]; result = [jsonData objectFromJSONData]; } [Recipe MR_truncateAll]; [[NSManagedObjectContext MR_defaultContext] MR_save]; [Recipe MR_importFromDictionary:result]; [[NSManagedObjectContext MR_defaultContext] MR_save]; } </code></pre> <p>The import works without giving me an error, but when i inspect the content of the SQLite-Database, i have two equal entries in the Ingredient-Table:</p> <p>Image of the Database-Content: <a href="http://twitpic.com/8fa0k3" rel="nofollow">http://twitpic.com/8fa0k3</a></p> <p>Currently i am kind of helpless, to solve this problem, and i would be very happy, if someone could help me out.</p>
 

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