Re: Core Data: strange keypath problem
Re: Core Data: strange keypath problem
- Subject: Re: Core Data: strange keypath problem
- From: Quincey Morris <email@hidden>
- Date: Thu, 17 Sep 2009 10:10:54 -0700
On Sep 17, 2009, at 10:00, Michael Swan wrote:
So I am working on a simple Core Data app that can track how much I
have made from various apps I sell (right now I just have two iPhone
ones I charge for). This is also the app that my Expenses tutorial
is based on. I am working on the monthly totals portion again and
trying to use fetching for the totals. I have added a 'month'
derived attribute to the AppSales entity (yes, I know it should be
singular, but I dare not change it now). I have added a text field
to the interface that shows the month attribute correctly with
bindings. However, when I am in the Application entity's class and
do a fetch for all AppSales that have an application of self and a
month of x (varies by method, 1-12) I get a keypath not found in
entity message in the log. I have tested to make sure that I can in
fact fetch AppSales entities based on the Application instance and
that part works, I can even NSLog the month of the first item in the
array. I must be missing something really simple but have no idea
what it is. I have listed relevant code below:
What do you mean by "derived attribute"? A transient attribute? That
won't work.
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