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POMagicalRecord save array with relationship
 

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  1. POMagicalRecord save array with relationship
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    <p>I have three tables. Table Run,Pin and Note. Relationship between them are:</p> <p><strong>1 Run N Pin</strong></p> <p><strong>1 Pin N Note</strong></p> <p>I'm trying to update Run, insert one Pin(pointing to Run) and insert N Notes(pointing to Pin). And, when user goes to another screen, I get the notes of the inserted pin. But, my problem is that is returning just one note. So, I don't know if the error is on the Update/Insert method or on find method. I tried a lot of different ways to do that, but any of them solved my problem.</p> <p><em>Insert/Update:</em></p> <pre><code>[MagicalRecord saveWithBlock:^(NSManagedObjectContext *localContext) { // Get current Run Run *runDb = (Run*) [localContext objectWithID:self.idRun]; //Create a pin Pin *newPin = [Pin MR_createInContext:localContext]; [newPin setSt_description:self.txtName.text]; [newPin setRun: runDb]; /* Set latitude &amp; longitude */ newPin.dec_latitude = (NSDecimalNumber *)[NSDecimalNumber numberWithDouble:currentLocation.coordinate.latitude]; newPin.dec_longitude = (NSDecimalNumber *)[NSDecimalNumber numberWithDouble:currentLocation.coordinate.longitude]; /* Update run, incrementing total pins*/ int pins = [runDb.int_total_pin intValue]; NSNumber *pinsN = [NSNumber numberWithInt:pins+1]; [runDb setInt_total_pin:pinsN]; for (int i=0; i&lt;[notes count]; i++) { Note *note = [Note MR_createInContext:localContext]; [note setSt_note:[[notes objectAtIndex:i] st_note]]; [note setPin:newPin]; } } completion:^(BOOL success, NSError *error) { if(!success) NSLog(@"%@", error); }]; </code></pre> <p><em>Find Method (Get all notes of a pin)</em></p> <pre><code>-(NSArray*) getNotesFromPin:(NSManagedObjectID*) pinId{ NSPredicate *predicate1 = [NSPredicate predicateWithFormat:@"pin == %@", pinId]; //Return notes from pin return [Note MR_findAllWithPredicate:predicate1]; } </code></pre> <p>On the log, I can see that MagicalRecord is inserting 5 objects (3 notes, 1 pin and 1 run):</p> <pre><code>NSManagedObjectContext(MagicalRecord) MR_contextWillSave:](0xba9ba70) Context BACKGROUND SAVING (ROOT) is about to save. Obtaining permanent IDs for new 5 inserted objects 2013-11-24 19:24:28.103 MyProject[35447:1ea1b] __70-[NSManagedObjectContext(MagicalSaves) MR_saveWithOptions:completion:]_block_invoke_021(0xba9ba70) → Finished saving: &lt;NSManagedObjectContext (0xba9ba70): *** BACKGROUND SAVING (ROOT) ***&gt; on *** BACKGROUND THREAD *** </code></pre>
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