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POCoreData for Adding under an Object in Relationship
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  1. POCoreData for Adding under an Object in Relationship
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    copied!<p>This is probably easier for iPhone devs who are familiar with CoreData but i am not and would really like to know how to properly access my data within a crucial deadline.</p> <p>This is what my core data is once its set to an <code>NSMutableArray</code> and pulled with NSLog</p> <pre><code>Questions List KM: ( "&lt;Question: 0x8589630&gt; (entity: Question; id: 0x8588820 &lt;x-coredata://FDC76465-4884-473A-B46A-3451BCB74F5C/Question/p1&gt; ; data: {\n orderID = 0;\n project = \"0x818e300 &lt;x-coredata://FDC76465-4884-473A-B46A-3451BCB74F5C/Project/p1&gt;\";\n question = \"What is ...? \";\n strategy = \"&lt;relationship fault: 0x8264930 'strategy'&gt;\";\n})", "&lt;Question: 0x85898d0&gt; (entity: Question; id: 0x8588830 &lt;x-coredata://FDC76465-4884-473A-B46A-3451BCB74F5C/Question/p2&gt; ; data: {\n orderID = 1;\n project = \"0x818e300 &lt;x-coredata://FDC76465-4884-473A-B46A-3451BCB74F5C/Project/p1&gt;\";\n question = \"How is ...? \";\n strategy = \"&lt;relationship fault: 0x826fa60 'strategy'&gt;\";\n})", "&lt;Question: 0x8589930&gt; (entity: Question; id: 0x8588840 &lt;x-coredata://FDC76465-4884-473A-B46A-3451BCB74F5C/Question/p3&gt; ; data: {\n orderID = 2;\n project = \"0x818e300 &lt;x-coredata://FDC76465-4884-473A-B46A-3451BCB74F5C/Project/p1&gt;\";\n question = \"Where is ...? \";\n strategy = \"&lt;relationship fault: 0x826c430 'strategy'&gt;\";\n})" ) </code></pre> <p>I was able to easily pull this to an array with the below:</p> <pre><code>// fetch and sort questions NSFetchRequest *request = [[NSFetchRequest alloc] init]; NSEntityDescription *entity = [NSEntityDescription entityForName:@"Question" inManagedObjectContext:self.managedObjectContext]; [request setEntity:entity]; NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"orderID" ascending:YES]; NSArray *sortDescriptors = [[NSArray alloc] initWithObjects:sortDescriptor, nil]; [request setSortDescriptors:sortDescriptors]; NSError *error = nil; NSMutableArray *mutableFetchResults = [[self.managedObjectContext executeFetchRequest:request error:&amp;error] mutableCopy]; if (mutableFetchResults == nil) { // Handle the error. NSLog(@"No Results in Questions Array."); } [self setQuestionsList:mutableFetchResults]; </code></pre> <p>Here is the Question.h or Question Definitions:</p> <pre><code>#import &lt;Foundation/Foundation.h&gt; #import &lt;CoreData/CoreData.h&gt; @class Project, Strategy; @interface Question : NSManagedObject @property (nonatomic, retain) NSNumber * orderID; @property (nonatomic, retain) NSString * question; @property (nonatomic, retain) Project *project; @property (nonatomic, retain) NSSet *strategy; @end @interface Question (CoreDataGeneratedAccessors) - (void)addStrategyObject:(Strategy *)value; - (void)removeStrategyObject:(Strategy *)value; - (void)addStrategy:(NSSet *)values; - (void)removeStrategy:(NSSet *)values; @end </code></pre> <p>here is Strategy.h for definitions:</p> <pre><code>#import &lt;Foundation/Foundation.h&gt; #import &lt;CoreData/CoreData.h&gt; @class Question; @interface Strategy : NSManagedObject @property (nonatomic, retain) NSString * strategy; @property (nonatomic, retain) Question *question; @end </code></pre> <p>You can see in the NsLog of the data that there are Three Questions</p> <ol> <li>question = \"What is ...? </li> <li>question = \"How is ...?</li> <li>question = \"Where is ...?</li> </ol> <p>It also shows that there is a Strategy Section in the Relationship:</p> <pre><code>strategy = \"&lt;relationship fault: 0x826c430 'strategy'&gt;\ </code></pre> <p>What I need to be able to do is access this Strategy and Add a single Object to it of Type NSString.</p> <p>Once assigned then i need to Pull as the Strategies to an NSMutableArray to be pushing into a UITableView.</p> <p>I know this is a lot to take in but to an Apple Guru this probably sounds like Cake and Ice Cream.</p> <p>If more Information is needed to answer, please let me know in the comments....a great StackOverflow member once told me </p> <blockquote> <p>"sometimes the hardest part is finding the right way to ask a question."</p> </blockquote> <p>Any Help is Much Appreciated!</p>
 

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