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POhow can I put all fetch requests in a Core Data DAL?
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  1. POhow can I put all fetch requests in a Core Data DAL?
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    copied!<p>Totally new to Objective-C and Core Data, coming from a .net background I really want to put all of my fetch requests into some sort of class that I can call, preferably statically to get my objects, something like:</p> <p>ObjectType *myObject = [CoreDataDAL GetObject:ID];</p> <p>Anyone have a pattern to implement this?</p> <p>I am hacking my way through one right now but it's probably not quite right, will post code when I have it.</p> <p>EIDT: Here is my code as it stands right now - seems to work great - please rip it part if I am going down the wrong road - here is the basic DAL:</p> <pre><code>#import "CoreDataDAL.h" #import "CoreDataAppDelegate.h" @implementation CoreDataDAL @synthesize managedObjectContext; -(id)init { if (self=[super init]) { CoreDataAppDelegate *appDelegate = [[UIApplication sharedApplication] delegate]; self.managedObjectContext = appDelegate.managedObjectContext; } return self; } -(Client *) GetClient:(NSString *) ClientID{ /* Client Fetch Request */ NSFetchRequest *request = [[NSFetchRequest alloc]init]; NSEntityDescription *entityType = [NSEntityDescription entityForName:@"Client" inManagedObjectContext:managedObjectContext]; [request setEntity:entityType]; NSPredicate *predicate =[NSPredicate predicateWithFormat:@"ClientID==%@",ClientID]; [request setPredicate:predicate]; NSError *error; NSArray *entities = [[managedObjectContext executeFetchRequest:request error:&amp;error] mutableCopy]; return [entities objectAtIndex:0]; } @end </code></pre> <p>And here is how it is used in my view controllers:</p> <pre><code>CoreDataDAL *dal = [[CoreDataDAL alloc]init]; Client *client = [dal GetClient:clientID]; [dal release]; </code></pre> <p>Seems straight forward enough, thoughts?</p>
 

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