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Tag Archives: NSPredicate

CoreData generic findManyByKey

The base for many of my SELECT-ish queries when querying by exact match is one generic method I created in some category methods on NSManagedObjectContext:
-(NSArray*)entityName:(NSString*)entityName findManyByRelation:(NSDictionary*)dict
{
// TODO handle dict nil and emptyness
NSMutableArray *arr = initWithCapacity:dict.count];
for(NSString *key in dict)
{
…

Posted 09 Dezember 2009 † Marcus Rohrmoser § Articles in english § development ‡ Comments (0) ° Also tagged: , , , , , ,

CocoaTouch, CoreData and binary String Search

The query optimiser for NSPredicate queries ontop CoreData/SQLite on the iPhone is a bit rudimentary (cough) and so I had to optimise myself to get binary-search enabled quick results:

+(NSPredicate*)findBySearchTerm:(NSString*)rawTerm within:(BOOL)within context:(NSManagedObjectContext*)context
{
NSSet *tokens = ;
if(tokens == nil || tokens.count < = 0)
…

Posted 23 Oktober 2009 † Marcus Rohrmoser § Articles in english § development ‡ Comments (1) ° Also tagged: , , , , ,