fetched-property

I have tried to use fetched properties a couple of times, and although it seems to be the right approach, it never works. In my latest attempt I added the fetched-property to my entity, selected the other entity in the model as the 'destination', and set the predicate to a condition that I know is valid. Problem 1: When the NSManagedObject-class for the entity is generated it does not include anything for the fetched-property. After some searching I added the declaration for it in the .h file and the @dynamic statement for it in the .m file (yes, I know it's an NSArray * type). Problem 2: Even

I have a question about using fetched properties inside a NSPredicate (see below 'My question'). It's not about the predicate to get the fetched property. For clarification and for others, which may also face this problem I tried to make a small sample project. SAMPLE PROJECT The need to use Fetched Properties came, because my app was rejected because of violating the iOS Data Storage Guidelines. In QA1719 they write: Apps should avoid mingling app data and user data in the same file. I think this may be necessary for easier ICloud sync and may also help in migration. So, how to do this? I had

I'm relatively new to Core Data (coming from an SQLite background). Just finished reading the 'Core Data for iOS' book but I'm left with a number of baffling questions when I started modelling an app which has the following model: 'Accounts' entity which has a to-many 'transactions' relationship and a 'startingBalance' property 'Transaction' entity which has a to-many 'payments' relationship (and an inverse to Accounts) 'Payment' entity which contains details of the actual 'amount' paid For performance reasons I wanted to de-normalize the model and add a 'TotalAmountSpent' property in the

The Core Data Documentation states that: The fetch request associated with the [fetched] property can have a sort ordering, and thus the fetched property may be ordered. How do I specify the sort descriptors for the fetched property in Xcode's data model editor? I can't find a relevant field anywhere. I'm developing for the iPhone platform, if this makes any difference. If this is not possible via the graphical model editor, how do I go about modifying the fetch request for the fetched property in code so that it has a sort descriptor? The modeling tool doesn't appear to have a way to set the