iPhone CoreData join

Question

this is my core data model:

I\'m trying to get all LanguageEntries fro

Answer 1

The predicate properly wasn't created correctly, you must pass the parameters to predicateWithFormat. It should have been:

fetchRequest.predicate = [NSPredicate predicateWithFormat:@"Category.categoryName = %@ AND LanguageSet.languageSetName = %@", 
                                                          @"Food", 
                                                          @"English####Spanish"];

In case you were wondering what that does is it puts quotes around the string parameters automatically which are required when using a string in a predicate. When you created the query using NSString's format method that did not put the required quotes in.